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Insecticide mixtures for the management of pest complex in brinjal (Record no. 193908)

MARC details
000 -LEADER
fixed length control field	05551nam a22001937a 4500
082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER
Classification number	632.6
Item number	BIS/IN PG
100 ## - MAIN ENTRY--PERSONAL NAME
Personal name	Bista Jeba Bakthiyar
245 ## - TITLE STATEMENT
Title	Insecticide mixtures for the management of pest complex in brinjal
260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT)
Place of publication, distribution, etc	Vellayani
Name of publisher, distributor, etc	Department of Agricultural Entomology ,College of Agriculture
Date of publication, distribution, etc	2019
300 ## - PHYSICAL DESCRIPTION
Extent	81p
502 ## - DISSERTATION NOTE
Dissertation note	MSc
520 3# - SUMMARY, ETC.
Abstract	A study on “Insecticide mixtures for the management of pest complex in brinjal” aims to evaluate the efficacy of insecticide mixtures having component molecules of different mode of action against pests of brinjal and to find out the harvest time residues in fruits. Experiment was conducted at Instructional Farm, College of Agriculture, Vellayani, Thiruvananthapuram during 2018-19. <br/> Preliminary experiment was carried out in CRD to evaluate the efficacy of insecticide mixtures against grub and adults of epilachna beetle, Epilachna vigintioctopunctata, and nymphs of mealy bug, Coccidohystrix insolita. Insecticide mixtures viz. pyriproxyfen 5% + fenpropathrin 15% EC @ 25+75g a.i ha-1, fipronil 40% + imidacloprid 40% WG @ 175+175g a.i ha-1, thiamethoxam 12.6% + lambda cyhalothrin 9.5% ZC @ 27.5g a.i ha-1, betacyfluthrin 8.91% + imidacloprid 19.81%w/w @ 15.75+36.7g a.i ha-1, flubendiamide 19.92% w/w + thiacloprid 19.92% w/w @ 48+48g a.i ha-1, cypermethrin 3% + quinalphos 20% EC @ 30 + 200 g a.i ha-1 , deltamethrin 1% + triazophos 35% EC @ 10+350g a.i ha-1 were selected for the study. The recommended dose of these mixtures were prepared in aqueous solution and bioassay was done using 3rd instar grubs and adults of epilachna and 3rd instar nymphs of mealy bug. <br/> Results of the laboratory experiment revealed, cent per cent mortality of epilachna adults which were treated with betacyfluthrin 8.91% + imidacloprid 19.81% w/w @ 15.75+36.7g a.i ha-1, cypermethrin 3% + quinalphos 20% EC @ 30 + 200 g a.i ha-1 and fipronil 40% + imidacloprid 40% WG @ 175+175g a.i ha-1 after 96 h of treatment. Similar results were obtained in the mortality of epilachna grub after 72 h of treatment. Cent per cent mortality of mealy bug was observed when treated with betacyfluthrin 8.91% + imidacloprid 19.81% w/w @ 15.75+36.7g a.i ha-1, fipronil 40% + imidacloprid 40% WG @ 175+175g a.i ha-1 , cypermethrin 3% + quinalphos 20% EC @ 30 + 200 g a.i ha-1 and deltamethrin 1% + triazophos 35% EC @ 10+350g a.i ha-1 after 120 h of treatment. Based on the laboratory results three insecticide mixtures were selected for field study viz., betacyfluthrin 8.91% + imidacloprid 19.81% w/w @ 15.75+36.7g a.i ha-1, cypermethrin 3% + quinalphos 20% EC @ 30 + 200 g a.i ha-1 and fipronil 40% + imidacloprid 40% WG @ 175+175g a.i ha-1 . <br/> Field experiment was laid out in RBD at Instructional Farm, College of Agriculture, Vellayani, Thiruvananthapuram during summer 2018-19. Major pests documented in experimental field were whitefly, leafhopper, mealybug and shoot and fruit borer. Less incidence of whiteflies was observed in cypermethrin 3 % + quinalphos 20 % EC @ 30 + 200 g a.i ha-1 (0.72 plant-1) treated plants on fifteenth day after spraying followed by fipronil 40 % + imidacloprid 40 % WG @ 175+175g a.i ha-1 (1.78 plant-1) and betacyfluthrin 8.91 % + imidacloprid 19.81% w/w @ 15.75+36.7g a.i ha-1 (1.92 plant-1). The Lowest population of leaf hopper was observed in plants treated with cypermethrin 3% + quinalphos 20 % EC @ 30 + 200 g a.i ha-1 (0.32 plant-1) on fifteenth day after spraying followed by fipronil 40 % + imidacloprid 40 % WG @ 175+175g a.i ha-1 (0.96 plant-1) and betacyfluthrin 8.91% + imidacloprid 19.81 % w/w @ 15.75+36.7g a.i ha-1 (1.04 plant-1). Cypermethrin 3% + quinalphos 20 % EC @ 30 + 200 g a.i ha-1 was found to be superior over other treatments, in managing the population of mealy bug (1.71 plant-1) on fifteen days after treatment and was found on par with betacyfluthrin 8.91 % + imidacloprid 19.81 % w/w @ 15.75+36.7g a.i ha-1 (4.08 plant-1). Low percentage of shoot borer damage was recorded in plants treated with betacyfluthrin 8.91 % + imidacloprid 19.81 % w/w @ 15.75+36.7g a.i ha-1 (1.74%) on 30 DAS and was found on par with cypermethrin 3% + quinalphos 20 % EC @ 30 + 200 g a.i ha-1 (1.82 %) and fipronil 40 % + imidacloprid 40% WG @ 175+175g a.i ha-1 (1.93% ). Cypermethrin 3% + quinalphos 20 % EC @ 30 + 200 g a.i ha-1 treated plants showed the lowest fruit damage (8.85%) on 30 days after spraying followed by betacyfluthrin 8.91 % + imidacloprid 19.81% w/w @ 15.75+36.7g a.i ha-1 (10.34%). <br/> Betacyfluthrin 8.91 % + imidacloprid 19.81% w/w @ 15.75+36.7g a.i ha-1 treated plots recorded maximum yield (1.72 kg plant-1) followed by fipronil 40% + imidacloprid 40% WG @ 175+175g a.i ha-1 (1.64 kg plant-1) and cypermethrin 3 % + quinalphos 20 % EC @ 30 + 200 g a.i ha-1 (1.42 kg plant-1). <br/>The harvest time residues of these effective insecticide mixtures were studied and results revealed that all three effective insecticide mixtures were below limit of quantification (LOQ). <br/> The results of present study revealed that insecticide mixtures viz., betacyfluthrin 8.91% + imidacloprid 19.81% w/w @ 15.75+36.7g a.i ha-1, cypermethrin 3%+ quinalphos 20% EC @ 30 + 200 g a.i ha-1 and fipronil 40 % + imidacloprid 40 % WG @ 175+175g a.i ha-1 could effectively manage pest complex in brinjal.
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name as entry element	Agricultural Entomology
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name as entry element	Pest complex in brinjal
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name as entry element	Insecticide mixtures
700 ## - ADDED ENTRY--PERSONAL NAME
Personal name	Anitha, N (Guide)
856 ## - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier	http://krishikosh.egranth.ac.in/handle/1/5810145842
942 ## - ADDED ENTRY ELEMENTS (KOHA)
Source of classification or shelving scheme	Dewey Decimal Classification
Item type	Theses

Holdings
Not for loan	Collection code	Home library	Current library	Shelving location	Date acquired	Full call number	Barcode	Date last seen	Koha item type
Not For Loan	Reference Book	KAU Central Library, Thrissur	KAU Central Library, Thrissur	Theses	27/12/2019	632.6 BIS/IN PG	174702	27/12/2019	Theses