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ThesisItem Open Access Studies on varietal screening and chemical control against major peats intesting Soyabean.(Mahatma Phule Krishi Vidyapeeth, Rahuri, 1995) Singh, R. K; 632.7/SINThesisItem Open Access Effect of different dates of showing on the incidence of petes of cotton(Mahatma Phule Krishi Vidyapeeth, Rahuri, 1974) Mahindrkar, G.R; Pokharkar R.N; 632.7/MAHThesisItem Open Access Efficacy of insecticidal Mixture on jassids on sunflower,Bhendi and shoot fly on Hybrid Jawar(Mahatma Phule Krishi Vidyapeeth, Rahuri, 1972) Rajpat, S.G; Khanvilkar, V.G; 632.7/RAJThesisItem Open Access Efficacy of some granulated systemic Insecticides against the the Pest complex intesting High yielding cotton varieties in early stage og crop growth(Mahatma Phule Krishi Vidyapeeth, Rahuri, 1972) Hadawale, G. G; Pokharkar, R.N; 632.7/HADThesisItem Open Access Studies on the comparative efficacy of different modes of pesticidal treatment against imp. pest of hybrid cotton(Mahatma Phule Krishi Vidyapeeth, Rahuri, 1972) More, U. N; Moholkar, P.R; 632.7/MORThesisItem Open Access Efficiency of certain Granulated systemic Insecticides Applied to soil with different placements Against some Imp. pests of Hybrid jawar(Mahatma Phule Krishi Vidyapeeth, Rahuri, 1972) Gandhale, D. N; Talgeri, G.M; 632.7/GANThesisItem Open Access Seasonal incidence, screening, biology and Management of Maruca Vitrata (geyer) on Pigeonpea(Mahatha Phule Krishi Vidyapeeth,Rahuri, 2020) Shejulpatil Sumedha Jayprakash; Kulkarni, S. R.The present investigation entitled, “Seasonal incidence, screening, biology and management of Maruca vitrata (Geyer) on pigeonpea”, was conducted during kharif 2017-19 at Department of Agricultural Entomology, Post Graduate Institute, Mahatma Phule Krishi Vidyapeeth, Rahuri. Studies on seasonal incidence of spotted pod borer during kharif 2017 and kharif 2018 revealed that the peak population of M. vitrata observed in last week September to first week of November and maximum pod damage observed in pod development stage. From the present study it has been concluded that the pest appears in the field from bud initiation stage and the maximum population recorded during flowering period of the crop. Hence, the similar trend of correlation between major weather parameters and pests was observed during both the season. The correlation studies during both the seasons revealed that there was a negative correlation between mean number of M. vitrata webs/plant, per cent pod damage and minimum temperature relative humidity, rainfall while positive correlation with maximum temperature, bright sunshine hours and evaporation. However, wind velocity showed positive impact on mean number of M. vitrata webs/plant in first season while it was negative in second season. This indicated that increase in both minimum temperature, relative humidity and rainfall was not congenial for population buildup of spotted pod borer, whereas increase in maximum temperature, bright sunshine hours and evaporation favoured the pest buildup. Laboratory studies was carried out during kharif 2017 and 2018 on biology of the spotted pod borer M. vitrata revealed that the incubation period of eggs varies from 2 to 6 days. There were five larval instars which required 12 to 16 days to complete their development. There was prepupal and pupal phase occurred after the larval Pupation took place on plant, inner side of damaged pods or some times on rearing containers in sliken cocoons under laboratory conditions. The pupal period varied from 6 to 8 days. The adult moth had medium brown wings and creamy white to brown body. As per the data recorded the longevity of male moths ranged from 2 to 6 days, while that of female moth varied from 4 to 10 days. The overall pooled on incidence of M. vitrata on pigeonpea genotypes revealed that the genotypes viz., ICP-8863, BDN-716 and BDN-711 had lowest M. vitrata larvae population, lowest per cent pod and seed damage and were graded under resistant category. The values of simple correlation coefficient of different morphological plant characters and biochemical factors in relation to infestation of larval population, pod damage, seed damage due to M. vitrata revealed that there was a significantly negative correlation of trichome density on leaves and pod wall with per cent pod damage and per cent seed damage, respectively. Whereas, trichome density on flower and days to 50 % flowering had significantly positive correlation with larval population of M. vitrata, per cent pod damage and per cent seed damage. Whereas, days to maturity had significantly negative correlation with the larval population of M. vitrata and per cent seed damage and significantly positive correlation with per cent pod damage. Similarly, the pod breadth showed significantly negative correlation with the per cent pod damage and per cent seed damage. The pod wall thickness and seed breadth showed significantly negative correlation with per cent pod and seed damage, respectively. Total phenol and tannin content in flower, pod wall and immature seed of different pigeonpea genotypes had significantly negative correlation with larval population of M. vitrata, per cent pod damage and per cent seed damage. Similarly, total sugar, chlorophyll and crude protein content in flower, pod wall and immature seed of different pigeonpea genotypes showed significantly positive correlation with larval population of M. vitrata, per cent pod damage and per cent seed damage. The pooled data on the effect of various chemical insecticides against M. vitrata larvae on pigeonpea crop revealed that Chlorantraniliprole 18.5 SC was most effective treatment in keeping lowest population of M. vitrata larvae and continued its superiority over rest of the treatments under study on 3, 7, 10 and 14 days after spray. The next effective treatment was Flubendiamide 480 SC which was found statistically at par with the treatment Spinosad 45 SC. Similarly, the pooled data on the effect of various biopesticides revealed that the Bacillus thuringiensis spp. kurstaki 0.5% WP continued its superiority over rest of the treatments under study on 3, 7, 10 and 14 days after spray. The next best treatment was Beauveria bassiana 1.15% WP @ 7.5 g/L found at par with the treatments Beauveria bassiana 1.15% WP @ 5 g/L.ThesisItem Open Access Field screening of different genotypes and Management of Citrus Psylla (Diaphorina citri kuwayama) on Acid Lime(Mahatha Phule Krishi Vidyapeeth,Rahuri, 2019) Wagh Shital Suryabhan; Datkhile, R. V.An experiment entitied “Field screening of different genotypes and management of citrus psylla (Diaphorina citri kuwayama) on acid lime” was conducted at the All India Co-ordinated Research Project on Fruits, Department of Horticulture, Mahatma Phule Krishi Vidyapeeth, Rahuri. Dist: Ahmednagar (Maharashtra) during 2018. The experiment was conducted in Randomized Block Design with three replication and ten treatments and screening of acid lime genotypes against citrus psylla. The result from the screening observation against citrus psylla was noted that the nymphal population recorded during 1st fortnight of October. The field experiment on screening of different acid lime genotypes against citrus psylla, Diaphorina citri, included total 12 genotypes under field condition (Balaji, Chakradhar, Rahuri Seedless, TAL-94/13, TAL-94/14, Phule Sharbati, Akola lime, NRCC Niboo-2, NRCC Niboo-3, NRCC Niboo-4, KL-12, Sai Sharbati). Amongst the acid lime genotypes tested under field condition, Phule Sharbati and Sai Sharbati genotypes having minimum psylla population and it was observed the significantly superior yield (12.00 and 10.50 ton/ha respectively). The genotypes viz.Rahuri seedless and Balaji next best ones. The maximum psylla population observed on NRCC Niboo-3 genotype and recorded minimum yield (06.50 ton/ha), which is highly susceptible to the citrus psylla. As regard the management of citrus psylla, all the insecticidal treatments were found to be significantly effective against citrus psylla over untreated control on acid lime. The treatment with the lowest population of citrus psylla was recorded by cyantraniliprole 10.26% OD (07.00 Psylla nymphs/5 cm twig) at 3rd, 7th and 14th days after sprays over rest of the treatments and it was significantly superior over other treatments. The next best treatment was spirotetramat 120 SC + imidacloprid 120 SC (07.66 psylla nymphs/5 cm twig) followed by tolfenpyrad 15% EC (08.00 psylla nymphs), spinetoram 11.7% SC (08.66 psylla nymphs), thiamethoxam 25% WG (08.66 nymphs) and emamectin benzoate 5% WG (09.00 psylla nymphs). The maximum population (34.33 psylla nymphs/5 cm twig) was recorded in untreated control.The treatment with cyantraniliprole 10.26% OD @1.0 ml/l recorded the highest (53.52 t/ha) yield of acid lime followed by spirotetramat 120 SC + imidacloprid 120 SC @ 0.5 ml/l (52.00 t/ha), tolfenpyrad 15% EC @ 1.6 ml/ha (50.50 t/ha) with ICBR (1:11.82, 1:32.66, 1:09.26), respectively. However, the above findings were based on the results of experimentation for only one season, they may be considered as merely indicative and further study is necessary for definite conclusion.ThesisItem Open Access Seasonal incidence and biology of flower bud Maggot (Dasineura gossypii FLETCHER ) : an emerging pest of Cotton(Mahatha Phule Krishi Vidyapeeth,Rahuri, 2018) Sale Kaveri Subhash; Hole, U.B.Studies on the “Seasonal incidence and biology of flower bud maggot (Dasineura gossypii Fletcher) : an emerging pest of cotton” were undertaken at the Cotton Improvement Project, Mahatma Phule Krishi Vidyapeeth, Rahuri 2017. The incidence of flower bud maggot was observed from September to December and maximum flower bud maggot infestation recorded during 44th MW. In addition to that, effect of meteorological parameters were also studied. The lower temperature, morning and evening humidity showed negative and non significant correlation and rainfall showed negative and significant correlation with flower bud maggot infestation; while the higher temperature and bright sunshine hour (BSH) showed positive and non significant correlation with flower bud maggot infestation. In the study of screening of Bt cotton genotypes against flower bud maggot, the incidence of flower bud maggot varied in Bt cotton genotypes. In Bt cotton genotypes, MRC7017, MRC-7383, Trinetra, Ajeet 104-2, Raja, Jadoo, Vitthal, Passion, Cotbank, Dr. Brent, Ajeet 199, Ajeet 155, MRC-7377, Pancham and Champion were recorded lower incidence of flower bud maggot. Mallika gold, Marvel, President gold and Bhakti were moderately susceptible to flower bud maggot; while MRC-7351 was comparatively highly susceptible to flower bud maggot infestation. The duration (days) of different life stages viz., eggs, first instar maggot, second instar maggot, third instar maggot, pupal period, adult stage (male) and adult stage (female) were recorded (days) as 4.3 ± 0.57, 1.7 ± 0.45, 2.8 ± 0.45, 3.5 ± 0.5, 4.1 ± 0.82, 1.3 ± 0.45 and 2.75 ± 0.56, respectively. The length (mm) of life stages was recorded as 1.28 ± 0.16, 0.98 ± 0.09, 1.33 ± 0.29, 2.13 ± 0.21, 1.59 ± 0.11, 1.82 ± 0,08 and 2.17 ± 0.12, respectively and the width (mm) was 0.63 ± 0.05, 0.50 ± 0.04, 0.52 ± 0.03, 0.86 ± 0.02, 1.41 ± 0.08, 0.42 ± 0.03 and 0.44 ± 0.05, respectively.
