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Prevalence of Insect Pests and Their Effects on Growth and Yield of Mungbean Grown Under Multipurpose Trees

M. S. Rahman
Department of Agroforestry, Bangladesh Agricultural University, Mymensingh-2202

M. A. Wadud
Department of Agroforestry, Bangladesh Agricultural University, Mymensingh-2202

M. K. Hasan
Department of Agroforestry, Bangladesh Agricultural University, Mymensingh-2202

A. Chakma
Department of Agroforestry, Bangladesh Agricultural University, Mymensingh-2202

M. Ahmad
Department of Entomology, Bangladesh Agricultural University, Mymensingh-2202

Abstract/ Executive Summary:

Insect infestation and yield performance of mungbean in association with Akashmoni (Acacia auriculiformis), Jhau (Casuarina equisetifolia), Sissoo (Dalbergia sissoo), and in the open field condition were studied during January to May 2008 in the field laboratory of Agroforestry Department, Bangladesh Agricultural University (BAU), Mymensingh. Twelve different insect species were identified in the mungbean field grown in association with three MPTs of which two were natural enemies i. e. insect predator. Highest insect population was recorded under Dalbergia sissoo (347) followed by Akashmoni (251), open field (159) and Jhau (141), respectively. Severe infestation was recorded in the vegetative stage followed by Pod maturation, pod initiation, flowering and pod filling stages, respectively. Highest yield was under Jhau tree (1.23 t ha^-1) which was statistically similar with yield in the open field (1.21 t ha^-1). Lowest yield was recorded under Sissoo tree (0.78 t ha^-1) which was statistically similar with yield under Akashmoni trees (0.89 t ha^-1). Compared with recommended mungbean yield (BINA, 2006), 36%, 12%, 46% and 14% yield reduced under Akashmoni tree, Jhau tree, Sissoo tree and in the open field condition, respectively.

Keywords: MPTs, Agroforesry, Mungbean, Insect pests, Growth and yield

Location: Field laboratory of Agroforestry Department, Bangladesh Agricultural University (BAU), Mymensingh

Start Date: 00-01-2008

End Date: 00-05-2008

Program Area: Farming System

Commodity: Jhao, Akash moni, Sisso, Mungbean

Objectives:

1. This study investigates the insect pests prevalence, severity of infestation and effects of infestation on the yield contributing characters and yield performance of mungbean in association with different MPTs.

Methodology:

An experiment was conducted to investigate the insect pests and their effect on the growth yield of mungbean (cv. BINA Mung-5) grown in association with three MPTs during January to May 2008. Three multipurpose trees (MPTs) were Akashmoni (Acacia auriculiformis), Jhau (Casuarina equisetifolia) and Sissoo (Dalbergia sissoo) insect infestation and yield performance of mungbean was observed under these three MPTs and these were the treatments of this study. The experiment was laid out in a Randomized Complete Block Design (RCBD) with 4 replications. The treatments were randomly distributed within the block separately for each species. Treatments were as: T₁ - insect infestation and yield performance of mungbean under Akashmoni; T₂ - insect infestation and yield performance of mungbean under Jhau; T₃ - insect infestation and yield performance of mungbean under Sissoo and T₄ - insect infestation and yield performance of mungbean in the open field condition. Except insect control, all necessary intercultural operations were done when required. The common insect pests of mungbean from the different treatments were sampled at different growth stages of mungbean. Sampling stages were vegetative, flowering, pod initiation, pod filling and pod maturation. Sampled insects were identified and confirmed with the help of specified person of the Department of Entomology, BAU, Mymensingh. Infested leaves of mungbean plants were counted only in the vegetative stage. Infested leaf counting was started from 30 days after sowing (DAS), every five days interval infested leaves was counted and continued upto 55 DAS (i. e., 30, 35, 40, 45, 50 and 55 DAS). Plant height (cm) was measured only just before the harvesting by meter scale. Number of pods per plants was counted after the pod maturation. yield of mungbean as grain were determined for each individual plots (4 m x 2.5 m i. e., 10 m²) and then converted to tha^-1. Finally treatments yields were compared with the recommended yield (BINA, 2006) of BINA mung-5. The collected data were analyzed statistically following the analysis of variance (ANOVA) technique and the mean differences were recorded by Duncan’s Multiple Range Test (DMRT) using the statistical computer package programme, MSTAT.

Source of Information: J. Agrofor. Environ. 2(1): 1-6, 2008; ISSN 1995-6983

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Twelve different insect species were identified in the mungbean field grown in association with three MPTs of which two were natural enemies i. e. insect predator. Highest insect population was recorded under Dalbergia sissoo (347) followed by Akashmoni (251), open field (159) and Jhau (141), respectively. Severe infestation was recorded in the vegetative stage followed by Pod maturation, pod initiation, flowering and pod filling stages, respectively.

Knowledge Management: Journal