Loading...
Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola
Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola was established on 20th October, 1969 with its head-quarter at Akola. This Agricultural University was named after the illustrious son of Vidarbha Dr. Panjabrao (alias Bhausaheb) Deshmukh, who was the Minister for Agriculture,Govt. of India. The jurisdiction of this university is spread over the eleven districts of Vidarbha. According to the University Act 1983 (of the Government of Maharashtra), the University is entrusted with the responsibility of agricultural education, research and extension education alongwith breeder and foundation seed programme.
The University has its main campus at Akola. The instructional programmes at main campus are spread over in 5 Colleges namely, College of Agriculture, College of Agricultural Engineering & Technology, College of Forestry, College of Horticulture and Post Graduate Institute. At this campus 4 degree programmes namely B.Sc.(Agri.) B.Sc. (Hort.), B.Sc. (Forestry) and B.Tech. (Ag. Engg.) , two Master’s Degree Programmes viz. M.Sc.(Agri.) and M.Tech. (Agri.Engg.) and Doctoral Degree Programmes in the faculties of Agriculture and Agril. Engineering are offered.
The University has its sub-campus at Nagpur with constituent College, College of Agriculture which offers B.Sc.(Agri.) and M.Sc.(Agri.) degree programmes. The Nagpur Campus is accomplished with a garden, surrounded by its natural beauty and a well established Zoo which attract the general public and visitors to the city. A separate botanic Garden is being maintained on 22 hectares with a green house for the benefit of research workers.
In addition there are 2 affiliated grant-in-aid colleges and 14 private non-grant-in-aid colleges under the umbrella of this University
A Central Research Station is situated at the main Campus which caters to the need of research projects undertaken by Crop Scientists of the principle crops of the region are Cotton, Sorghum, Oilseeds and Pulses.
Browse
55 results
Search Results
ThesisItem Open Access BIOEFFICACY OF INSECTICIDES AGAINST POD BORER COMPLEX OF PIGEONPEA.(Dr. Punjabrao Deshmukh Krishi Vidyapeeth, Akola, Maharashtra., 2019-07-22) RAMTEKE, KU. PRIYANKA DHANRAJ.; Nandanwar, Shri. V. N.The experiment was laid out in a randomized blocked design (RBD) incorporating eight treatments with three replications. The pre-treatment observation were recorded 24 hours before application of treatment while, post treatment observations were recorded at 3,7 and 10 days after application of treatment. The parameters on larval population of H. armigera and E. atomosa, per cent pod damage at harvest was recorded in experimental field and natural enemies was recorded in another separate plot. Yield of pigeonpea accordingly the yield per ha was calculated to study the economics (ICBR) of different treatments. During this investigation on the basis of above parameters revealed that treatment Rynaxypyr 18.5 SC emerged out as the most superior against pigeonpea pod borer complex in recording the lower larval population of H. armigera, E.atomosa, per cent pod damage at harvest. Another treatment Viz, Spinosad 45 SC, Emamectin benzoate 5 SG and Neem oil 2% also perform better and emerged as next effective treatments against pod borer complex and recorded significant lower larval population, per cent pod damage at harvest, and yield of pigeonpea. The treatment Neem oil 2% perform better for pod borer complex as compared to other treatments including control (water spray). The observation of natural enemies on pigeonpea recorded at weekly interval. Ladybird beetle activity started from 29th SMW (0.6/plant). The peak populatin of ladybird beetle was observed in 34thSMW (1.2/plant), Chrysopa was noticed from 37th SMW (0.4/ plant) with Peak population of (4.6 chrysopa/ plant) was observed during 45th SMW and occurrence of spider started from 33rd SMW (0.2) and peak Period was observed in 44th SMW with a peak incidence(1.4 spiders /plant). The treatment Rynaxypyr 18.5 SC recoreded the higher yield followed by Spinosad 45 SC, Emamectin benzoate 5 SG.Maximum incremental cost benefit ratio obtained from Emamectin benzoate. The treatment with Spinosad 45 SC recorded lowest cost benefit ratio.ThesisItem Open Access HERBAL MANAGEMENT OF MAJOR INSECT PESTS OF PADDY.(Dr. Punjabrao Deshmukh Krishi Vidyapeeth, Akola, Maharashtra., 2019-07-24) SAMRIT, KU. REKHA MADHUKAR.; Chaudhari, Dr. B. N.The results of seasonal incidence experiment were revealed that, yellow stem borer, gall midge, leaf folder, green leaf hopper and brown plant hopper were the main pests which damaged the crop. The results revealed that, Incidence of stem borer was initiated from 32nd MW and continued to 47th MW and its peak incidence during 36th MW (6.45 % DH) and 42nd MW (11.23% DH). The incidence of gall midge was initiated from 35th MW and continued to 45th MW and its peak incidence during 40th MW (15.21 % SS). The incidence of leaf folder was initiated from 33rd MW and continued to 47th MW and reached peak level during 44th MW (6.62 % damaged leaves). Population of green leaf hopper were initiated from 32nd MW and continued to 47th MW and its peak incidence during 44th MW (2.77 nos./hill). Population of brown plant hopper was initiated from 36th MW and continued to 47th MW and its peak incidence during 44th MW (12.6 nos./hill). Population of white backed plant hopper were initiated from last week of august (35th MW) to 47th MW and its peak incidence during 44th MW (4.47 nos./hill) and Incidence of army worm started from 29th MW and then reached zero level. Further the fluctuation in the incidence was recorded from 33rd MW up to 47th MW and attained peak infestation during 40th MW (0.36 nos./hill). The incidence of rice gundhi bug was commenced from 44th MW to 47th MW and attained peak incidence during 46th MW. The correlation analysis results revealed that, minimum temperature (r= -0.501) had significant negative correlation with incidence of rice stem borer. Maximum temperature (r= 0.680) had significant positive correlation with incidence of gall midge. Incidence of leaf folder had significant positive correlation with maximum temperature (r= 0.606) and significant negative correlation with minimum temperature at 5 % significant level. Rainfall (r= -0.655) and minimum temperature (r= -0.749) had significant negative correlation and maximum temperature (r= 0.734) and green mirid bug (r= 0.767) had significant positive correlation with population of green leaf hopper. Rainy days (r= -615) had significant negative correlation and brown mirid bug (r= 0.585) had significant positive correlation with population of green leaf hopper. Rainfall (r= -0.617) and rainy days (r= -671) had significant negative correlation and maximum temperature (r= 0.597) had significant positive correlation with population of brown plant hopper at 5 % significant level. Similarly, impact of green mirid bug (r= 0.953) and brown mirid bug (r= 0.898) on population of brown plant hopper showed significant positive correlation at 1 % significant level. Minimum temperature (r= -0.798) showed significant negative significant correlation with population of brown plant hopper at 1% significant level. In case of white backed plant hopper, rainfall (r= -0.615) and rainy days (r= -638) had significant negative correlation and maximum temperature (r= 0.646) had positive significant correlation with population of white backed plant hopper at 5 % significant level. Similarly, impact of green mirid bug (r= 0.870) and brown mirid bug (r= 0.842) on population of white backed plant hopper showed positive significant correlation at 1 % significant level. Minimum temperature (r= -0.781) showed significant negative correlation with population of white backed plant hopper at 1 % significant level. From the findings of present investigation in second experiment of insect pests management the treatment of 5% NSKE (1.57 % DH) was found significantly superior in reducing the incidence of dead hearts and for the management of white earheads (stem borer) of paddy 5 % NSKE (2.81 % WE) was found significantly superior treatment. The treatment of 5% garadi leaf extract (1.36 % SS) was found significantly superior in reducing the incidence of gall midge and treatment of 5 % bitter gourd leaf extract (2.06 % damaged leaves) was found significantly superior in reducing the incidence of leaf folder. Treatment of neem oil (1.01 nos./hill) was found significantly superior in reducing the population of green leaf hopper to other treatments and 5 % bitter gourd leaf extract + 5 % garadi leaf extract + 5 % custard apple leaf extract (2.42 nos./hill) was found significantly superior in reducing the population of brown plant hopper. Treatment of M. anisopliae (1.20 nos./hill) was found significantly superior in reducing the population of white backed plant hopper than other treatments. Regarding to natural enemies, the treatment of 5 % bitter gourd leaf extract + 5 % garadi leaf extract + 5 % custard apple leaf extract was found superior with higher population of brown mirid bug, green mirid bug, coccinellid beetle and spiders. The maximum yield recorded in the treatment combination of 5 % bitter gourd leaf extract + 5 % garadi leaf extract + 5 % custard apple leaf extract (39.33 q/ha). However, the ICBR was found in the treatment with treatment M. anisopliae (1:12.13).ThesisItem Open Access ESTIMATION OF DEVELOPMENTAL THRESHOLDS AND THERMAL REQUIREMENTS FOR COTTON PINK BOLLWORM, Pectinophora gossypiella (Saunders).(Dr. Punjabrao Deshmukh Krishi Vidyapeeth, Akola, Maharashtra., 2019-07-22) PEDDU, HEMANT VENKTESHWARA PRASAD.; Sawai, Dr. H. R.The pink bollworm, Pectinophora gossypiella (Saunders) is one of the most damaging insectpests of cotton, worldwide. The recent re-emergence of pink bollwormon Bt cotton in central and south cotton growing zones of India posed a serious challenge to the cotton production of the country. With predicted climatic changes, the pest status of pink bollworm is likely to be aggravated. In this context, a detailed knowledge of temperature-dependent population growth potential of pink bollworm is of paramount importance to undertake timely management actions before the pest could inflict much damage to the crop. In present study, a temperature-dependent population growth potential of pink bollworm was studied by rearing it on detached green bolls of cotton (~10 day old) at six different constant temperatures (15⁰C - 38⁰C) in laboratory. Several linear and non-linear models of biological significance to the development of poikilothermic organismswere fitted to the data on each life stage, e.g. cumulative logit distribution function (development time), Sharpe and DeMichele model (Development rate), Wang model (mortality), Stinner model (adult longevity), Gaussian with log function (total fecundity) and exponential modified function (age-related oviposition rate). Based on the established functions, the thermal thresholds, thermal unit requirements and temperature-dependent population growth potential of pink bollworm were estimated. Using stochastic simulation centered on cohort updating and rate summation approach, the life table parameters of pink bollworm at different constant temperatures were simulated. All the analyses were carried out using Insect Life Cycle Modeling (ILCYM) software, Version 3.0, developed by International Potato Center, Lima, Peru. The results revealed that the temperature-dependent rate of development for all the immature life stages of pink bollworm increased linearly until approximately 34°C-35°C, after which it became non-linear and declined abruptly. The theoretical lower developmentthreshold temperatures estimated using linear regressions for immature life stages of pink bollworm applied to mean development rateswere 11.23⁰C, 11.37⁰C, 11.00⁰C and 11.20°C for egg, larvae, pupae and mean threshold for egg-pupae, respectively. The thermal unit requirements for development of different life stages of pink bollworm obtained using inverse of the slope of the regression equation were 72.99 DD, 285.71 DD, 144.92 DD and 503.62 DD for eggs, larvae, pupae and cumulative DD for egg-pupae, respectively. The extreme temperature of 38°C was found lethal to egg and larval stages of pink bollworm at which no development to the next stage occurred. Both the female and the male adults of pink bollworm had an optimal lifespan at temperatures between 20°C and 35°C. The females laid very few eggs at 15°C temperature, and no egg laying occurred at 38°C temperature. This demonstrates the importance of prevailing temperatures in determining the climatic suitability for mating and reproduction in pink bollworm.The life table parameters estimated at different constant temperatures indicated that the pink bollworm population could grow at temperatures between 20⁰C-35⁰C, however themostfavoured range of temperature for its optimum growth was observed between 25⁰C -30⁰C. The maximum net reproductive rate of 16.302 females/ female/ generation and highest total fecundity of 56.565 individuals/ female/ generation were obtained at 25⁰C temperature. Mean length of generations decreased from 63.183 days at 20⁰C to 31.673 days at 30⁰C. The maximum finite rate of increase (1.059 - 1.064 females/ female/ day) and shortest doubling time (11.228 – 12.278 days) were observed at temperatures between 25⁰C and 30⁰C. All the estimated developmental functions and life table parameters of pink bollworm at constant temperatures between 15-38⁰C were reasonably similar when compared with literature reports. The outputs of the present study will be helpful in understanding and comprehending seasonal dynamics of pink bollworm under varied temperature conditions, which could facilitate in undertaking agro-ecoregion specific management strategies for this pest in the context of climate change.ThesisItem Open Access STUDIES ON EGG PARASITOIDS Trichogramma species ON PINK BOLLWORM, Pectinophora gossypiella (Saunders) ON COTTON.(Dr. Punjabrao Deshmukh Krishi Vidyapeeth, Akola, Maharashtra., 2019-07-22) S, KU. ASHA.; Neharkar, Dr. P. S.The present studies entitled “Studies on egg parasitoids Trichogramma species on pink bollworm, Pectinophora gossypiella (saunders) in cotton’’ was undertaken at laboratory conditions in the Insect Biocontrol Laboratory, ICAR-CICR, Nagpur during 2018-2019 covering the objectives, to identify the most effective species of Trichogramma from the available lab cultured species for parasitisation of pink bollworm eggs, to study the efficacy of parasitisation by Trichogramma species on pink bollworm reared from early and late season population in laboratory and to study the efficacy of parasitisation by Trichogramma species at different temperatures. Different species of Trichogramma used for the investigation are Trichogramma bactrae (Nagaraja), Trichogramma brasiliensis (Ashmead), Trichogramma japonicum (Ashmead) and Trichogramma chilonis (Ishii) @ four gravid females per a batch of hundred pink bollworm eggs. The fitness life parameters of all the four Trichogramma species such as per cent parasitisation, per cent adult emergence, developmental period, per cent unparasitised host eggs and per cent larval emergence from the host (pink bollworm) eggs were investigated under laboratory conditions. Among all the Trichogramma species the maximum per cent parasitisation and adult emergence was recorded by T. bactrae with 87.83 and 91.25 per cent, respectively when reared at room temperature conditions. However, the next best performance under the same laboratory conditions was recorded by T. chilonis with 83.83 per cent parasitisation and 88.66 per cent adult emergence. On the early population of pink bollworm collected from the rosette flowers during the month of August from the control plots grown with non Bt cotton variety at ICAR- CICR, Nagpur the maximum per cent parasitisation (89.80%) and adult emergence (94.68%) was recorded under T. bactrae which was significantly superior over other Trichogramma species. Whereas, on the late population of pink bollworm collected from the infested cotton bolls during the month of Nov-Dec from the same plots, the performance of T. chilonis was significantly superior over T. brasiliensis and T. japonicum and it was statistically at par with T. bactrae. However, there was no significant difference found in developmental period and per cent larval emergence from the pink bollworm eggs among all the treatments on both early and late population pink bollworm eggs. Among different temperatures used to carry out the experiment T. bactrae was recorded with maximum per cent parasitisation and adult emergence at both 280C and 250C, where in per cent parasitisation recorded was 88.50 and 87.83 whereas 92.22 and 95.82 per cent adult emergence was recorded at these two temperatures, respectively. Whereas, at 180C T. chilonis recorded highest per cent parasitisation i.e. 80.83 per cent and adult emergence recorded was 90.82 per cent. Non significant difference was found in developmental period and per cent host larval emergence from pink bollworm eggs among the treatments at different temperatures. However, the developmental period of all the Trichogramma species was recorded to decline with increase in temperature from 18, 25 and 280C. The development period ranged from 12.67 to 13.33 days at 180C and 9.50 to 10.50 days at 250C whereas only 6.00 to 7.00 days at 280C. As per the study Trichogramma species i.e. T. brasiliensis (Ashmead) and T. japonicum (Ashmead) were recorded to be less effective in parasitising pink bollworm eggs. However one day old (24 hr) eggs of pink bollworm were the most preferred age group for parasitisation by all the Trichogramma species and their ability to parasitise older eggs declined subsequently.ThesisItem Open Access STUDIES ON DIVERSITY OF COTTON THRIPS IN MAHARSHTRA.(Dr. Punjabrao Deshmukh Krishi Vidyapeeth, Akola, Maharashtra., 2019-07-22) BAGHELE, KU. DURGA JANARDAN.; Biradar, Dr. V. K.The results revealed diversity of 4 species of thrips viz., Ayyaria chaetophora Karny, Rhipiphorothrips cruentatus Hood, Thrips hawaiiensis Morgan and Thrips palmi Karny belongs to order Thysanoptera and family Thripidae, infest the cotton crop in Maharashtra. Ayyaria chaetophora identified from surveyed field of Nagpur and Parbhani districts. Thrips palmi was identified from Nagpur, Amravati, Wardha, Buldhana, Akola, Yavatmal, Jalgaon, Dhule, Ahmednagar and Parbhani districts. Rhipiphorothrips cruentatus species identified from the Katol region of Nagpur. Thrips hawaiiensis was identified from Washim. Comparison of the sequences with those in Gene bank and The barcode of life data (BOLD) revealed that 9 samples of T. palmi showed the close sequence matches of 100% with the National Center for Biotechnology Information (NCBI) sequences and 3 samples of T. palmi species were found 99% similarity. Both T. hawaiiensis and R. cruentatus showed 100% similarity with NCBI sequences whereas 3 samples of A. chaetophora resembles about 91% similarity with NCBI sequences. Phylogenetic analysis of molecular data, results into the formation of three major clusters (clades) in 17 thrips samples collected from 11 cotton growing districts of Maharashtra. Abundant species T. palmi comes under clade 1 due to similarity in their sequences. Whereas all three identified species A. chaetophora shared same clade under the clade 2. However, T. hawaiiensis and R. cruentatus comes under clade 3 showed close relatedness or genetic similarity among them. Identified thrips species from cotton growing districts revealed that T. palmi was most abundant species found throughout the cotton growing districts of Maharashtra. A. chaetophora thrips species also identified from different locations of Maharashtra from where samples collected. T. hawaiiensis and R. cruentatus reported from the limited location indicated that the distribution of this thrips species is limited on cotton crop.ThesisItem Open Access BIORATIONAL MANAGEMENT OF MAJOR PESTS OF OKRA.(Dr. Punjabrao Deshmukh Krishi Vidyapeeth, Akola, Maharashtra., 2019-07-22) PANBUDE, CHETAN UTTAM.; Neharkar, Dr. P. S.The present investigation entitled, “Biorational management of major pests of okra” was undertaken during the kharif season of 2018 in the field of Agricultural Entomology Section, College of Agriculture, Nagpur. The trial incorporating eight treatments including control which were replicated thrice in Randomized Block Design. Jassids attained maximum (3.26 jassids/leaf) during 35th standard week and aphids attained maximum during 36th standard meteorological week (6.13 aphids/leaf) while the peak incidence of whiteflies (8.49 whiteflies/leaf) was observed during 37th standard meteorological week. Jassids showed negatively significant correlation with evaporation (r = -0. 6789**) while whiteflies populations showed positively significant correlation with minimum temperature (r = 0.5487*). The observations were recorded on the basis of shoot infestation, fruit infestation (number basis), fruit damage (weight basis) and yield of marketable fruits. Also sucking pest population were recorded on top, middle and bottom leaves of plant. During this investigation, on the basis of above parameters revealed that, lowest infestation (shoot and fruit infestation) and highest yield over control was observed in treatment of Spinosad 45 SC 0.01% (T8; 7.06%) shoot infestation, 18.40% fruit infestation on number basis and 18.63% fruit infestation on weight basis with 87.18 q/ha yield followed by, Metarhizium anisopliae CFU 1×108 (T4), Verticillium lecanii CFU 1×108 (T5), Beauveria bassiana CFU 1×108 (T6), Neem oil 2% (T1), Neem Seed Extract 5% (T3) and Karanj oil 2% (T2). In case of sucking pests all the treatments were found significantly superior over control (T8; untreated). The treatment of Spinosad 45 SC 0.01% (T7) recorded lowest aphid population of 8.45 no. of aphids/leaf, jassid population of 4.63 jassids/leaf, whitefly population 2.76 whiteflies/leaf and recorded yield of 87.18 q/ha yield of marketable fruits. The next best treatments were of Neem oil 2% (T1) followed by Neem Seed Extract 5% (T3) which recorded 74.12 and 70.95 q/ha yield of marketable fruits respectively. The next promising treatments were of Karanj oil 2% (T2) which recorded 8.96 no. of aphids/leaf, 5.88 jassids/leaf, 3.39 no. of whiteflies/leaf with 64.44 q/ha yield of marketable fruits. In the treatments, Verticillium lecanii CFU 1×108 (T5) recorded 9.29 aphids/leaf, 6.17 jassids/leaf, 3.01 whiteflies/leaf and recorded 66.82 q/ha yield of marketable fruits. Metarhizium anisopliae CFU 1×108 (T4) recorded 10.07 aphids/leaf, 5.96 jassids/leaf, 3.74 whiteflies/leaf and recorded 59.20 q/ha yield. The treatment Beauveria bassiana CFU 1×108 (T6) recorded 9.81 aphids/leaf, 6.08 jassids/leaf, 3.58 whiteflies/leaf and recorded 51.11 q/ha yield which is smallest among yield of rest of treatments but superior over control (T8) for managing the okra shoot and fruit borer infestation and sucking pests on okra. The ICBR (incremental cost benefit ratio) was also worked out to know the economy of the treatments. Higher ICBR of (32.37) was observed in treatment with the Spinosad 45 SC 0.01% (T7) next promising treatment according to ICBR were of Verticillium lecanii CFU 1×108 (T5; 23.75), Neem Seed Extract 5% (T3; 18.49), Metarhizium anisopliae CFU 1×108 (T4; 17.91), Beauveria bassiana CFU 1×108 (T6; 11.70), Neem oil 2% (T1; 9.68 q/ha), Karanj oil 2% (T2; 7.07).ThesisItem Open Access MANAGEMENT OF SUCKING PESTS OF Bt. COTTON.(Dr. Punjabrao Deshmukh Krishi Vidyapeeth, Akola, Maharashtra., 2019-07-22) BHARKADE, KU. POOJA SHRIRAM.; Lavhe, Dr. N. V.The results on the bio-efficacy of pesticides used for sucking pests of Bt cotton shows that the chemical pesticides caused higher per cent reduction, while biopesticides caused moderate to lower per cent reduction.Among the insecticidal treatments, Flonicamid 0.02 per cent, Acetamiprid 0.004 per cent and Imidacloprid 0.008 per cent were found more effective against aphids, jassids, thripsand whiteflies on Bt cotton followed by thiamethoxam 0.005 per cent. Among the biopesticides, Neem oil 2.0 per cent and NSKE 5.0 per cent were found moderate effective and Lecanicilliumlecanii 4g/l found least effective against sucking pests of Bt cotton. Effect of various insecticides on field population of natural enemies of cotton sucking pests revealed that, the treatment with biopesticidesviz,.Neem oil 2.00 per cent, NSKE 5.0, Lecanicilliumlecanii4g/lwere found safer against Coccinellids, Chrysoperla and Spider predator after their application in the cotton field. The treatments with chemical pesticides Flonicamid 0.02 per cent, Imidacloprid 0.008 per cent and Acetamiprid 0.004 per cent were found moderately safer against population of natural enemies.While,Thiamethoxam 0.005 per cent was found toxic against Coccinellids,Chrysoperla and spider predator. The study revealed that, incidence of aphids and whiteflies initiated from 29th MWand its peak incidence was in 39thMW. Incidence of jassidsand thrips initiated 29th MW, respectively and its peak period was in 37th MW. The correlation analysis results revealed that, incidence of aphids was significant and positively correlated with maximum temperature (0.781**) and minimum temperature (0.614**) and highly significant and negatively correlated with morning humidity(-0.525**) and evening humidity(-0.514**). Jassids correlated significant and positively with maximum temperature (0.583**) and minimum temperature (0.710**).Thrips positive significant with maximum temperature (0.458*) and minimum temperature (750**).Whiteflies positive significant with maximum temperature (0.736**) and minimum temperature (0.596**) and highly significant negatively correlated with morning humidity (-0.497*). Among the different treatments higher yield of cotton was recorded in plot treated with Flonicamid 0.02 per cent followed by Acetamiprid 0.004 per cent, Imidacloprid 0.008 per cent. Lecanicilliumlecanii 4 g/l gave the lowest yield among the different treatments.ThesisItem Open Access SEASONAL OCCURRENCE AND MANAGEMENT OF MAJOR INSECT PESTS OF SOYBEAN.(Dr. Punjabrao Deshmukh Krishi Vidyapeeth, Akola, Maharashtra., 2019-07-22) RAUT, ASHISH RAMKRUSHNA.; Deotale, Dr. R. O.The present study entitled, “Seasonal occurrence and management of major insect pests of soybean” was undertaken incorporating nine treatments (which includes botanicals also) consisting of neem oil @ 2% (T1), neem seed extract (NSE) @ 5% (T2), quinalphos 25 EC @ 0.05% (T3), fenvalerate 20 EC @ 0.01% (T4), emamectin benzoate 5 SG @ 0.02 % (T5), indoxacarb 15.8 EC @ 0.01% (T6), spinosad 45 SC @ 0.01% (T7) and control (water spray) (T8) against major insect pests on soybean i.e. tobacco leaf eating caterpillar, green semilooper, girdle beetle and stem fly. The average population of major insect pests on soybean was observed at 3, 7 and 14 days after each spray application. The experiment was laid out in RBD during Kharif 2018. The efforts were made to correlate the incidence of different insect pests with abiotic factors in a separate experimental plot of 5 X 5 m2. The results revealed that, green semilooper Thysanoplusia orchalcea Walker, tobacco caterpillar Spodoptera litura Fabricius, Stem fly Melanagromyza sojae Zehntner and girdle beetle Obereopsis bravis were the main pests which damaged the crop. The incidence of semilooper and tobacco caterpillar initiated in 29th and 30th MW respectively and its peak incidence was in 34th and 35rd MW respectively. Incidence of stem fly and girdle beetle initiated from 29nd and 32th MW respectively and its peak period was in 39st MW. The correlation analysis results revealed that, incidence of girdle beetle was significant and positively correlated with maximum temperature (0.751*) and highly significant and positively correlated with minimum temperature (0.721**) and. Stem fly infestation non-significant and positively correlated with maximum temperature (0.601*) and highly significant and positively correlated with minimum temperature (0.642**). Minimum cumulative mean number of tobacco caterpillar were recorded at 3, 7 and 14 DAT in the treatment of spinosad 45 SC @ 0.01% (0.13, 0.07 and 0.06 larvae/mrl)was found to be very effective treatment followed by the treatments of fenvalerate 20 EC @ 0.01% (0.13, 0.10 and 0.06 larvae/mrl), emamectin benzoate 5 SG @ 0.02% (0.21, 0.15 and 0.10 larvae/mrl), indoxacarb 15.8EC @ 0.01% (0.23, 0.18 and 0.13 larvae/mrl), quinalphos 25 EC @ 0.05% (0.46, 0.38 and 0.33 larvae/mrl), neem oil 2%(0.97, 1.06 and 1.19 larvae/mrl), neem seed extract (NSE) @ 5% (1.02, 1.11 and 1.26 larvae/mrl) and control (1.34, 1.52 and 1.63 larvae/mrl). Minimum cumulative mean number of green semilooper were recorded at 3, 7 and 14 DAT in the treatment of emamectin benzoate 5 SG @ 0.02% (0.10, 0.07 and 0.06 larvae/mrl) was found to be very effective treatment followed by the treatments of fenvalerate 20 EC @ 0.01% (0.13, 0.09 and 0.03 larvae/mrl), spinosad 45 SC 0.01% (0.13, 0.09 and 0.08 larvae/mrl), indoxacarb 15.8 EC @ 0.01% (0.39, 0.20 and 0.14 larvae/mrl), quinalphos 25 EC @ 0.05% (0.39, 0.36 and 0.35 larvae/mrl), neem oil 2% (0.74, 0.80 and 0.90 larvae/mrl), neem seed extract (NSE) @ 5% (0.81, 0.92 and 1.07 larvae/mrl) and control (1.02, 1.16 and 1.38 larvae/mrl). Minimum cumulative mean per cent foliage damage due to tobacco caterpillar and green semilooper were recorded at 3, 7 and 14 DAT in the treatment of fenvalerate 20 EC @ 0.01% (1.04, 0.74 and 0.67%) was found to be very effective treatment followed by the treatments of spinosad 45 SC 0.01%. (1.11, 0.90 and 0.84%), emamectin benzoate 5 SG @ 0.02% (1.26; 1.03 and 0.99%), indoxacarb 15.8 EC @ 0.01% (1.30, 1.15 and 1.08%), quinalphos 25 EC @ 0.05% (6.12, 6.68 and 7.19%), neem oil 2% (6.50, 7.61 and 7.93%), neem seed extract (NSE) @ 5% (6.86, 7.93 and 8.37 %) and control (9.32, 11.38 and 12.56%). Minimum cumulative mean per cent infestation of girdle beetle was recorded at 3, 7 and 14 DAT in the treatment of spinosad 45 SC 0.01%. (4.15, 4.28 and 4.42%) was found to be very effective treatment followed by the treatments of emamectin benzoate 5 SG @ 0.02% (4.45, 4.58 and 4.67%), fenvalerate 20 EC @ 0.01% (5.12, 4.51 and 4.60%), indoxacarb 15.8 EC @ 0.01% (4.90, 5.04 and 5.26%), quinalphos 25 EC @ 0.05% (5.05, 5.10 and 5.26%), neem oil 2%(5.75, 5.94 and 5.91%), neem seed extract (NSE) @ 5% (6.68, 6.80 and 6.80%) and control (14.21, 14.20 and 14.20%). Minimum cumulative mean per cent infestation and tunneling at physiological maturity due to stem fly were recorded after three sprays in the treatment of spinosad 45 SC @ 0.01% (T7:37.10% infestation and 8.15% tunnel/5plants) was found to be very effective treatment followed by the treatments of fenvalerate 20 EC @0.01% (T4:38.00% infestation and 9.10% tunnel/5plants), emamectin benzoate 5 SG @ 0.02% (T5:39.10% infestation and 8.20% tunnel/5plants), indoxacarb 15.8 EC @ 0.01% (T6:45.23% infestation and 10.02% tunnel/5plants), quinalphos 25 EC @ 0.05% (T3:47.20% infestation and 11.05% tunnel/5plants), neem oil @ 2% (T1:50.75% infestation and 12.00% tunnel/5plants) and neem seed extract (NSE) @ 5 per cent (T2:54.95% infestation and 12.20% tunnel/5plants) and control (T8:61.20% infestation and 15.60% tunnel/5plants). The treatment with spinosad 45 SC @ 0.01% recorded maximum yield and the highest ICBR was recorded in the treatment of fenvalerate 20 EC 0.01%. The other treatments in descending order in respect to yield were T7> T4> T5> T6> T3> T1> T2 and in respect to ICBR were T4>T7> T3> T6> T5> T2> T1.ThesisItem Open Access DYNAMICS OF MAJOR PESTS OF SOYBEAN UNDER DIFFERENT DATES OF SOWING.(Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola, Maharashtra., 2017-06-23) BALORE , BHIMASHANKAR PANDURANG.; Kolhe, Dr. A. V.
