Thumbnail Image

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

20192
Reset filters
Subject: Agricultural Entomology × Author: WANKHEDE, UMESH ASHOKRAO. × Start date: 2017 ×
Reset filters

Search Results

Now showing 1 - 2 of 2
  • Thumbnail Image
    ThesisItemOpen Access
    COMPATIBILITY AND PERSISTENCE TOXICITY OF SOME PESTICIDES AGAINST Helicoverpa armigera (Hub.) UNDER LABORATORY CONDITION.
    (Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola, Maharashtra., 2019-07-30) WANKHEDE, UMESH ASHOKRAO.; Yadgirwar, Dr. P. V.
    The present investigation entitled on Compatibility and persistence toxicity of some pesticides against Helicoverpa armigera (Hub.) under laboratory condition was conducted in order to study the effect of some insecticide-fungicide mixtures, phytotoxicity effect of insecticide-fungicide mixtures on cotton plants and the persistence toxicity of insecticide-fungicide mixtures on cotton against Helicoverpa armigera. The experiment was conducted during the year 2018-2019 in the Toxicology Laboratory of Department of Entomology, Dr. PDKV, Akola. The experiment was laid in Completely Randomized Design with twelve treatments and replicated thrice. The treatments included, Acephate 75 SP, Chlorantraniliprole 18.5 SC, Emamectin benzoate 5 % SG, Indoxacarb 15.8 EC, Profenophos 50 % EC, Thiodicarb 75 % WP, Acephate 75 SP + [Mancozeb 63 % WP + Carbendazim 12 % WP], Chlorantraniliprole 18.5 SC + [Mancozeb 63 % WP + Carbendazim 12 % WP], Emamectin benzoate 5% SG + [Mancozeb 63 % WP + Carbendazim 12 % WP], Indoxacarb 15.8 EC + [Mancozeb 63 % WP + Carbendazim 12 % WP], Profenophos 50 % EC + [Mancozeb 63 % WP + Carbendazim 12 % WP], and Thiodicarb 75 % WP + [Mancozeb 63 % WP + Carbendazim 12 % WP]. The larvae of H. armigera (Hub.) were reared on artificial diet using standard rearing technique under laboratory conditions for studying mortality percentage as well as for use in persistent toxicity studies. Artificial diet (Kranthi et al., 2005) method of bioassays were followed in order to determine the mortality percentage and working out of persistent toxicity (PT) values of different pesticides formulations against Helicoverpa armigera (Hub.). The observations of mortalities on each concentration were recorded at a regular interval upto 48 hours. The mortality percentage studies revealed that Emamectin benzoate 5 % SG + [Mancozeb 63 % WP + Carbendazim 12 % WP] was highly toxic to the 3rd instar larvae of Helicoverpa armigera in artificial diet method of bioassays. From the results, pesticides combinations studied for effect of insecticide-fungicide mixtures or mortality percentage by artificial diet methods can be arranged in their descending order of toxicities i.e. Emamectin benzoate 5 % SG + [Mancozeb 63 % WP + Carbendazim 12 % WP] > Chlorantraniliprole 18.5 SC + [Mancozeb 63 % WP + Carbendazim 12 % WP] > Emamectin benzoate 5 % SG > Acephate 75 SP + [Mancozeb 63 % WP + Carbendazim 12 % WP] > Chlorantraniliprole 18.5 SC > Acephate 75 SP > Profenophos 50 % EC + [Mancozeb 63 % WP + Carbendazim 12 % WP] > Indoxacarb 15.8 EC + [Mancozeb 63 % WP + Carbendazim 12 % WP] > Profenophos 50 % EC > Indoxacarb 15.8 EC > Thiodicarb 75 % WP + [Mancozeb 63 % WP + Carbendazim 12 % WP] > Thiodicarb 75 % WP. In phytotoxicity studies all the test insecticide-fungicide mixture viz., insecticide alone i.e. Acephate 75 SP, Chlorantraniliprole 18.5 SC, Emamectin benzoate 5 % SG, Indoxacarb 15.8 EC, Profenophos 50 % EC, Thiodicarb 75 % WP and their combination with Mancozeb 63 % WP + Carbendazim 12 % WP had not caused any phytotoxic symptoms such as injury to leaf tip and leaf surface, wilting, vein clearing, necrosis and epinasty and hyponasty on cotton crop. Under the persistence studies of insecticide-fungicide mixture, the sprays of insecticide–fungicide mixtures (as treatment) at recommended doses were applied on cotton crop in the field. Fresh fruiting bodies from each insecticide treated plots were plucked after spray at 2, 4, 6 and 9, 11 (and so on till mortality persist) days of application along with peduncle and brought in the laboratory. They were allowed to feed on the treated fruits under ambient conditions in the laboratory. Simultaneously, the observations on mortalities in treated and untreated fruits were recorded at regular interval upto 72 hours period. The persistent toxicity studies after spray revealed that Acephate 75 SP + [Mancozeb 63 % WP + Carbendazim 12 % WP] recorded the highest Persistent Toxicity index (PTi) while Thiodicarb 75 % WP. recorded the lowest PTi. Computation on PT50 values to determine time duration for 50 % kill on residual toxicity revealed that Acephate 75 SP + [Mancozeb 63 % WP + Carbendazim 12 % WP] recorded highest residual toxicity while Thiodicarb 75 % WP. Recorded the lowest residual toxicity. Based on PTi and PT50 values the insecticide-fungicide mixture can be arranged in descending order for their Relative Persistence as Acephate 75 SP + [Mancozeb 63 % WP + Carbendazim 12 % WP] > Emamectin benzoate + 5 % SG + [Mancozeb 63 % WP + Carbendazim 12 % WP] > Chlorantraniliprole 18.5 SC + [Mancozeb 63 % WP + Carbendazim 12 % WP] > Emamectin benzoate 5 % SG > Chlorantraniliprole 18.5 SC > Acephate 75 SP > Profenophos 50 % EC + [Mancozeb 63 % WP + Carbendazim 12 % WP] > Indoxacarb 15.8 EC + [Mancozeb 63 % WP + Carbendazim 12 % WP] > Profenophos 50 % EC > Indoxacarb 15.8 EC > Thiodicarb 75 % WP + [Mancozeb 63 % WP + Carbendazim 12 % WP] > Thiodicarb 75 % WP.
  • Thumbnail Image
    ThesisItemOpen Access
    COMPATIBILITY AND PERSISTENCE TOXICITY OF SOME PESTICIDES AGAINST Helicoverpa armigera (Hub.) UNDER LABORATORY CONDITION.
    (PUNJABR.AO KHISHI VIDYAPEETH, AKOLA, (M. S.), 2019-07-30) WANKHEDE, UMESH ASHOKRAO.; Yadgirwar, Dr. P. V.