Field Evaluation of Certain Chemical Insecticides and Bioagents against Diamondback Moth, (Plutella xylostella L.) on Cabbage (Brassica oleracea var. capitata L.): An Investigational Research | Chapter 1 | Emerging Issues in Agricultural Sciences Vol. 1

 An experiment was transported at the research plot of the Department of Agricultural Entomology at Central Research Farm, Sam Higginbottom University of Agriculture, Technology and Sciences, Prayagraj all the while the rabi season of 2021. The main aim to conduct this research was to experience the Insecticides and bioagents effect on control of Plutella xylostella. The field was store randomised block design (RBD) with seven situations and individual controlled plot. The Mean basic public plant was captured day before and 3, 7 and 14 days subsequently each spray. Mean decline in the larval culture per plant told that all the situations were significantly superior over the control (6.51). Chlorantraniliprole 18.5% SC written shortest mean larval public of P xylostella (1.52), attended by Spinosad 45% SC (1.75), Indoxacarb 14.SC (2.00), Emamectin Benzoate 5%SG (2.28), B thuringiensis (2.68), B bassiana (2.87), M anisopilae (3.02). Highest yield (280 q/ha) as well as B:C percentage (1:6.37) was got from the situation Chlorantraniliprole 18.5% SC followed by Indoxacarb 14.5 SC (1:6.33), Emamectin Benzoate 5%SG ( 1:6.25), B thuringiensis (1:5.97), Spinosad 45% SC (1:5.75), B bassiana (1:5.72), M anisopilae (1:5.50) as distinguished to control (1:3.34).

Author(s) Details:

Shaik Ahmed Razack Khan,
Department of Entomology, SHUATS, U.P., India.

Prajakta Anil Mohite,
Department of Entomology, SHUATS, U.P., India.

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Effects of Aqueous Neem Leaves Extract on 4th Stage Larvae of Diamondback Moth Plutella xylostella L. (Lepidoptera: Plutellidae): New Perspectives | Chapter 5 | Advances and Trends in Agricultural Sciences Vol. 4

The diamondback moth Plutella xylostella Linnaeus, 1758 (Lepidoptera: Plutellidae) is improperly and excessively controlled with synthetic insecticides in vegetable crops. Neem (Azadirachta indica A. Juss) is reported to be an alternative natural insecticide in the control of many insect pests including P. xylostella. The aims of this study are to evaluate the lethal, antifeedant and post- treatment effects of neem leaves extract, on the 4th instar larvae of P. xylostella compared to those of 2 synthetic insecticides (Conquest Plus 388 EC and Cydim Super). Exposure of larvae on cabbage leaves (Ø = 90 mm) treated or not during 24 h, showed mortality rates between 1.67 and 13.33% and highest mortalities were due to neem extract and Cydim Super. Larvae fed with cabbage leaves disks treated with neem extract, consumed 271.67 ± 47.64 mm2 of the surface while in the control, the consumption was 309.50 ± 35.57 mm2. The emerging rate of P. xylostella adults was lower 57.78 ± 13.04% for neem leaves extract compared to controls and insecticide treatments whose rates were from 65.32 ± 7.34 to 89.63 ± 4.23% (p = 0). Neem extract caused wing damage to 21.86% of emerged P. xylostella, compared to the controls and insecticide treatments where all emerging adults were normal. The neem leaves extract could enhance the management of 4th instar larvae of P. xylostella by regulating its development to adults and deforming wings. Therefore it can be considered as a new hope in developing a management program against P. xylostella.

Author (s) Details

Abla Déla Mondédji
Laboratoire d’Ecologie et d’Ecotoxicologie (LaEE), Département de Zoologie et de Biologie Animale, Faculté des Sciences, Université de Lomé, Togo.

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