ECO-FRIENDLY APPROACHES FOR THE MANAGEMENT OF MAJOR INSECT PESTS OF VEGETABLE PIGEONPEA
Loading...
![Thumbnail Image](assets/images/Item.jpg)
Date
2021-01
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
University of Horticultural Sciences Bagalkot. (College of Horticulture, Bagalkot).
Abstract
Studies on eco-friendly approaches for the management of major insect pests
of vegetable pigeonpea was carried out at College of Horticulture, University of
Horticultural Sciences, Bagalkot during 2018-2020. A total number of 25 insect
species belonging to seven orders viz., Lepidoptera, Hemiptera, Coleoptera, Diptera,
Orthoptera, Thysanoptera and Hymenoptera were recorded during the period of
investigation. Among which pod borer, Helicoverpa armigera (Hubner); blue
butterfly, Lampides boeticus (Linnaeus); pod fly, Melanagromyza obtusa (Malloch);
green plant bug, Nezara viridula (Linnaeus) and pod bug, Clavigralla gibbosa
(Spinola) were found as major insect pests of vegetable pigeonpea. The peak activity
of pod borer and blue butterfly was noticed at 46th SMW (November) however, the
maximum population of green plant bug, pod bug and pod fly were noticed at 46th
SMW (November), 50th SMW (December) and 4th SMW (January), respectively. The
influence of different date of sowing and varieties on the incidence of major insect
pests revealed that early sown vegetable pigeonpea var ICP 7035 (June 15th)
registered lower incidence of insect pests and higher grain pod yield.
The efficacy of different insecticides tested against pod borer and blue
butterfly revealed that two sprays of chlorantraniliprole 18. 5 SC at 0.2 ml/l and
cyantraniliprole 10 OD at 1.2 ml/l were found highly effective. Whereas, higher green
pod yield of 66.96 q/ha was recorded in the plots treated with chlorantraniliprole 18. 5
SC at 0.2 ml/l with highest B: C ratio (6.59).
Evaluation of insecticides against pod fly and pod bugs suggested that
sequential application of chlorantraniliprole 18.5 SC at 0.2 ml/l - acephate 75 SP at
1.0 g/ml was effective in reducing the seed damage by pod fly and pod bugs and
resulted in higher green pod yield (60.98 q/ha) and B: C ratio (5.40).
Among the different IPM modules, the ecofriendly integrated module
comprising of i) sorghum as mixed crop at 100 g per hectare, ii) application of neem
cake at 250 kg per hectare at the time of sowing, iii) first spray of HearNPV (1 x 109
POB/ml) + azadirachtin 10000 ppm at 1.0 ml per litre, iv) spraying of
chlorantraniliprole 18.5 SC at 0.2 ml per litre after ten days of first spray, v) spraying
of acephate 75 SP at 1.0 g per litre + sweetener after ten days of second spray,
vi) spraying of fipronil 5 EC at 1.0 ml per litre + sweetener after ten days of third
spray, vii) spraying of Flubendiamide 480 SC at 0.2 ml per litre after ten days of
fourth spray can be employed in vegetable pigeonpea instead of superior chemi
intensive module to effectively manage insect pests of vegetable pigeonpea.