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Integrated Management Practices of Hairy Catterpillar of Soybean

M.A. Monim
Oil Seed Research Centre, RARS, Bangladesh Agricultural Research Institute, Rahmatpur, Barisal

A.S.M.A. Monim
Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka

D. J costa
RARS, Bangladesh Agricultural Research Institute, Jamalpur

M.A. Baset
RARS, Bangladesh Agricultural Research Institute, Jamalpur

M.M. Rahman
RARS, Bangladesh Agricultural Research Institute, Jamalpur

Abstract/ Executive Summary:

Management of hairy catterpillar of soybean (Spilarctia obliqua Walker) using zetpowder, neem kernel extract, neem oil and Ripcord 10EC alone and their integration was studied at Regional Agricultural Research Station, .Bangladesh Agricultural Research Institute, Rahmatpur, Barisal during rabi season of 2007-2008 and 2008-2009. The highest hairy catterpillar was 40 per plant observed in the last week of March in 2008, 2009. Among the treatments Ripcord 10EC reduced the highest Hairy catterpillar (99.17%) with the highest BCR (5.36) followed by Neem kernel extract + Zet powder (27.08%) and Neem oil + Zet powder (20.00%) and Neem kernel extract (16.67%) recorded at 15 days after spray over the pre-treatment count. Neem oil +Zet powder gave the second highest BCR (2.78) followed by Zetpowder (2.75), Neem kernel extract + Zetpowder (2.54) and Neem kernel extract (2.24).

Keywords: Integrated, Management, Practices, Hairy catterpillar, Soybean

Location: Oilseed Research Centre, Regional Agricultural Research station, Bangladesh Agricultural Research Institute (BARI), Rahmatpur, Barisal

Start Date: 00-00-2007

End Date: 00-00-2009

Program Area: Pest Management

Commodity: Soybean

Objectives:

1. To find out the most effective plant materials with their integration for the management of hairy catterpillar of soybean.

Methodology:

The experiment was carried out during the period from rabi season of 2007-2008 to 2008-2009 at the field of Oilseed Research Centre, Regional Agricultural Research station, Bangladesh Agricultural Research Institute (BARI), Rahmatpur, Barisal, The experiment was laid out in a randomized complete block design (RCBD) with three replications. The unit plot size was 3 m X 4 m Fertilizers were applied at the rate of 25: 30: 60: 16: 2: 1 NPKSZnB kg/ha respectively as recommended for Bangladesh (Anon, 2004). Half of N (as urea) and all others fertilizers were applied during final land preparation and the rest of half N was applied at the initial stage of flowering. During land preparation, cowdung was applied at 10 ton/ha. The spacing maintained for soybean entries was 30 cm row to row and 10 cm seed to seed distances. The soybean variety BARI soybean-5 were sown in 30 December, 07 and 08. Intercultural operations, such as irrigation was given twice, weeding and mulching were done as and when necessary as per recommendation of Mondall and wahhab (2001). Six treatments namely, Zet powder @5g/l, Neem kernal extract(2.5%), neem kernal extract+ Zet powder, Neem oil 5ml/l +Zet powder, Ripcod 10EC@ 2ml/l and untreated control were evaluated against hairy catterpillar of soybean under field condition. Three hundred fifty gram (350g) neem seed kernal was crushed and added to 10 litre of water and kept over night and sieved with fine net. Then the solution was ready for spray. Four gram (4g) detergent powder (Zet powder) added to 1 litre of water stirring and sieved with fine net. Four (4) ml neem oil added to 1 litre of water with 4 g zet powder stirring and sieved then the solution was ready for spray. Botanicals and insecticide were applied on February 20, 2008, 2009 at the vegetative and pod formation stage of the crop with the help of knapsack sprayer. Randomly 10 plants were selected per plot for counting hairy catterpillar of soybean. Larvae of the hairy catterpillar were counted bellow the leaf, shoot and pod of the plant before 5, 10 and 15 days after spray in all the treatments. The crop was harvested on 20-04-08, 09. Seed yield of different treatments were recorded. Recorded data were compiled and analyzed in the computer package programmee MSTAT-C for Randomized Complete Block Design (RCBD) and mean value were separated by Duncan’s Multiple Range Test (DMRT). Benefit cost ratios (BCR) of different treatments were also calculated.

Source of Information: J. Agrofor. Environ. 4 (2): 77-79, 2010; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Result revealed that neem formations and Zetpowder are effective in checking the hairy catterpillar in soybean only up to 10-15 days after spray. Their performance was inferior to Ripcord 10 EC treated plots. Morde and Blackwell (1993) reported that antifeedant and insect growth regulatory effect are present in azadirachtin and neem product which can be used for insect management. It is reported that about 50% mortality of Spilarctia oblique occurred in jute plant when applied 5% concentration of neem oil in Bangladesh. Result revealed that although botanicals fail to reduce 100% hairy catterpillar but it safe for natural enemies and also safe for environmental pollution.

Knowledge Management: Journal