SEASONAL INCIDENCE AND EVALUATION OF BRINJAL VARIETIES AGAINST BRINJAL SHOOT AND FRUIT BORER (Leucinodes orbonalis Guen.)

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dc.contributor.advisorSUNITHA DEVI, R
dc.contributor.author.PRASHANTH, K
dc.date.accessioned2021-09-23T05:21:14Z
dc.date.available2021-09-23T05:21:14Z
dc.date.issued2020
dc.description.abstractSeasonal incidence and evaluation of brinjal varieties against brinjal shoot and fruit borer (Leucinodes orbonalis Guen.)” was carried out at College farm, College of Agriculture, Professor Jayashankar Telangana State Agricultural University, Rajendranagar, Hyderabad during the kharif, 2016-17. Seasonal incidence of L. Orbonalis on shoot infestation started in fourth week of July i.e., 30th standard meteorological week with 2.06 per cent shoot infestation and reached its peak to 42.29 per cent during second week of October coinciding with 41st standard meteorological week. Thereafter, the infestation of shoot and fruit borer on shoots declined gradually and persisted up to 46th standard meteorological week (5.02%) and infestation reduced during last week of November. The infestation on fruits was observed from third week of August i.e. 33rd standard meteorological week with 10.05 per cent fruit infestation. The infestation increased gradually and reached its peak to 51.08 per cent during second week of October i.e. 41st standard meteorological week. Further, there was gradual decrease in infestation and persisted upto second week of December i.e. 49th standard meteorological week. Correlation coefficients worked out between shoot infestation and weather parameters indicated that the per cent shoot damage was positively correlated with maximum temperature (r=0.227) and rainfall (r=0.061), whereas minimum temperature (r= -0.164), morning (r= -0.126) and evening (r= -0.028) relative humidity showed negative correlation. Similarly, the incidence of brinjal shoot and fruit borer was positively correlated with maximum temperature (r=0.283) and negatively with other weather parameters such as minimum temperature (r= -0.292), rainfall (r=-0.385), morning (r=-0.175) and evening (r=-0.189) relative humidity. However, the correlation coefficients for all the weather parameters were found non significant for the shoot and fruit infestation by L.orbonalis. The results pertaining to the studies on shoot and fruit borer infestation in different varieties /hybrids by L. orbonalis in different varieties/ hybrids at vegetative stage of the crop growth period revealed that Mahyco-11 recorded significantly lowest shoot infestation of 10.14 per cent. While, the varieties Keerthana (28.12%), MEBH-99 (26.09%) and Ravina (24.54%) recorded significantly highest shoot infestation which were more susceptible to shoot borer compared to susceptible check Gulabi (13.77%). In rest of the varieties shoot infestation ranged from 12.00 to 22.42 per cent. Similarly, mean fruit infestation also revealed the similar trend. The varieties Mahyco-11 and Ravaiya recorded lowest fruit infestation of 14.59 and 16.77 per cent, respectively while the variety Keerthana recorded maximum fruit infestation of 44.31 per cent followed by MEBH-99 (44.21%) and Kanakadurga (42.82%) which was significantly on par with susceptible check, Gulabi (39.83%). In rest of the varieties mean fruit infestation ranged from 18.71 to 39.36 per cent. A field experiment was carried out during Kharif, 2016-17 at college farm, College of Agriculture, Rajendranagar to study the efficacy of seven insecticides viz., cyantraniliprole 10 OD @ 90 g a.i ha-1, chlorantraniliprole 18.5 SC @40 g a.i ha-1, emamectin benzoate 5 SG @10 g a.i ha-1, deltamethrin 2.8 SC @ 12.5 ga.i ha-1, spinosad 45 SC @ 75 g a.i ha-1 , flubendaminde + thiacloprid 480 SC @ 120 g a.i ha-1 and profenophos 50 EC @ 500 g a.i ha-1 against brinjal shoot and fruit borer. Overall mean of first spray showed that all the insecticidal treatment were significantly superior over untreated control. Among all the insecticidal treatments, spinosad 45 SC @ 75 g a.i ha-1 was the most effective treatment with lowest shoot infestation (8.97%) and fruit infestation (11.55 %) followed by profenophos 50 EC @ 500 g a.i ha-1 with shoot infestation of 10.27 per cent and fruit infestation of 13.31 per cent. Whereas, flubendamide+thiacloprid 480 SC @ 120 g a.i ha-1 and deltamethrin 2.8 SC @ 12.5 g a.i ha-1 were found least effective for the management of fruit and shoot borer. Similar trend were observed during second and third spray of new insecticides against shoot and fruit infestation by L. orbonalis. overall mean of second and third spray showed that all the insecticidal treatments were superior over untreated control. Among the treatments, spinosad 45 SC @ 75 g a.i ha-1 was the most effective treatment with lowest shoot infestation of 11.52 and 11.56 per cent and fruit infestation of 13.43 and 13.33 per cent during second and third spray, respectively followed by profenophos 50 EC @ 500 g a.i ha-1 with shoot infestation of 11.76 and 11.96 per cent and fruit infestation of 13.99 and 14.09 per cent, respectively. Whereas, flubendamide + thiacloprid 480 SC @ 120 g .a.i ha-1 and deltamethrin 2.8 EC @ 12.5 g a.i ha-1 were found least effective for the management of fruit and shoot borer.en_US
dc.identifier.citationD10,482en_US
dc.identifier.urihttps://krishikosh.egranth.ac.in/handle/1/5810176099
dc.keywordsSEASONAL INCIDENCE AND EVALUATION OF BRINJAL VARIETIES AGAINST BRINJAL SHOOT AND FRUIT BORER (Leucinodes orbonalis Guen.)en_US
dc.language.isoEnglishen_US
dc.publisherProfessor Jayashankar Telangana State Agricultural Universityen_US
dc.subEntomologyen_US
dc.themeM.Scen_US
dc.these.typeM.Scen_US
dc.titleSEASONAL INCIDENCE AND EVALUATION OF BRINJAL VARIETIES AGAINST BRINJAL SHOOT AND FRUIT BORER (Leucinodes orbonalis Guen.)en_US
dc.typeThesisen_US
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