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Bio-rational Based Management of Insect Pest Complex of Country Bean

N. K. Dutta
Entomology Division, Bangladesh Agricultural Research Institute, Gazipur

M. Mahmudunnabi
Entomology Division, Bangladesh Agricultural Research Institute, Gazipur

D. Sarker
Entomology Division, Bangladesh Agricultural Research Institute, Gazipur

S. N. Alam
Entomology Division, Bangladesh Agricultural Research Institute, Gazipur

Abstract/ Executive Summary:

A field experiment was undertaken at research field of Bangladesh Agricultural Research Institute (BARl), Gazipur during 2013-14 cropping season to evaluate several bio-rational management packages against insect pest complex of country bean. Results indicated that, the management package (PI) comprising of Sanitation + release of bio-control agents, Trichogramma chi/onis and Bracon hebetor + spraying of Azadiractin 1 EC (Bioneem plus) + spraying of MNPV appeared as the best package which provided 82.40% and 75.52% reduction of flower and pod infestation, respectively over control by pod borer complex, although highest reduction of aphid population over control (92.02%) was noticed in sanitation + voliamflexi 300 SC (P4) treated plot The highest yield increase over control (82.09%) and benefit cost ratio (12.18) was also obtained from. (PI).

Keywords: Bio- rational based management, Insect, Pest,Country bean

Location: research field of Bangladesh Agricultural Research Institute (BARl), Gazipur

Start Date: 00-00-2013

End Date: 00-00-2014

Program Area: Pest Management

Commodity: Bean

Objectives:

To develop an environment friendly and bio-rational based management package against insect pest complex attacking country bean.

Methodology:

This study was conducted at the research field of Entomology Division, BARI, Gazipur during rabi 2013-14 cropping season. There were three dispersed replications and the experiment was set in RCB design. The country bean variety "BARI seem I" was grown following the recommended practices (Zaman 1992). The unit plot size was 4.0mx2.5m. There were five treatment packages and these were assigned as follows T_I= Sanitation (weekly hand picking and destruction of infested flowers, pods and larvae) +weekly release of bio-control agents, Trichogramma chilonis (@ I gm parasitised eggs/ha/week and Bracon hebetor @ 1000-1200 adults Iha/week + Azadiractin lEC (Bioneem plus) @ Iml II of water + MNPV @ l.Og / I of water (2sprays at IS days interval starting from the first initiation of borer attack). T₂= Sanitation +weekly release of bio-control agents as above + Azadiractin O.3EC (Bioneem) @ 3ml / I of water + ofBt powder @ OAg / I ofwater(2sprays at IS days interval starting from the first initiation of borer attack). T₃= Sanitation +weekly release of bio-control agents as above + 2 sprayings of Azadiractin 3EC (Fytomax) @ Iml / I of water + spraying of Spino sad 45 SC @ OAml / I of water (2 sprays at 15 days interval starting from the first initiation of pest attack) T₄= Sanitation + spraying of voliam flexi 300 SC (Chlorantraniliprole + Thiamethoxam) @ O.5ml/l of water ( at 7 days interval starting from the first initiation of pest attack and continued up to the last harvest) T₅= Untreated control. Numbers of healthy and borer infested flowers were counted and recorded from randomly selected 50 rachis. For counting aphid population 10 em top of the rachis was considered .At each harvest the number and weight of healthy and infested pods were also recorded. The percent flower, pod infestation by borer was calculated from the recorded data. The collected data were properly compiled, coded, tabulated and analyzed statistically using MSTAT-C software. The means were separated for significant difference using DMRT. For understanding the comparative profitability of different treatment packages benefit cost ratios were also calculated following Ali et al.,(1996).

Source of Information: Annual Research Report, Entomology Division, BARI, Gazipur,2013-2014

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The findings of the present study led to assumed that bio-contro1 based integrated management approach would help our farmers combating insect pests of country bean in a sustainable way without having particular dependence on conventional insecticides. However, further studies suggested for on-farm validation of the developed management package.

Knowledge Management: Report/Proceedings