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Incidence and Damage Severity of Insect Pests and Their Natural Enemies in Some Selected Crops

A.K.M.Z. Rahman
Entomology Division, BARI, Gazipur

D. Sarker
Entomology Division, BARI, Gazipur

S.N. Alam
Entomology Division, BARI, Gazipur

Abstract/ Executive Summary:

A field survey was carried out at Gazipur in seven different crops viz. tomato, cabbage, cauliflower, chilli, brinjal, mustard and soybean during 2013-2014 to document the incidece and pest status of insect pests and their associated natural enemies. In seedling stage very less number of insect pests and natural enemy was observed in the study. In vegetative stage the highest leaf infestation was observed in cabbage (2.36%) by Spodoptera litura and highest no. of syrphid fly (45.89) was observed in mustard in vegetative stage. In reproductive stage, significantly the highest % infestation by Spodoptera litura was noticed in cabbage (3.79%), which was statistically similar to chilli and soybean. Significantly the highest no. of leaf folder and jute hairy caterpillar larvae were observed in soybean followed by brinjal. At harvesting stage, due to different insects pests, the infested fruits ranged from 0.71 to 51.56 %. The lowest infested fruit (0.71%) was obtained from chilli, while the highest infested fruits (51.56 %) were attained in brinjal.

Keywords: Incidence,Damage, Insects pests, Selected crops

Location: Gazipur

Start Date: 00-00-2013

End Date: 00-00-2014

Program Area: Pest Management

Commodity: Insects

Objectives:

The present study was undertaken to document the infestation status of major insect pests of seven different crops along with their natural enemies.

Methodology:

Studies were carried out at Entomology research field, BARI, Gazipur to collect data on the severity of insect pest problems of seven different crops along with their natural enemies at the three crop growth stages (seedling, vegetative and reproductive). Per cent infestation by number and weight also recorded during harvest. Soybean (var.BARI soybean 6) and mustard (var. BAR! Sharisha 16) were sown on 20 November 2013 rest of crops like cabbage, cauliflower, brinjal, chilli and tomato were transplanted on 20 December 2013. The plot size was 3m x 4m and distance between rows was I meter, plot to plot distance was 75 em. The experiment was laid out in RCB design with 3 replications. At each stage 10 plants were randomly selected for collecting data on no. of insect pests attacked, their infestation status, and natural enemies at 7 days interval.

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 lowest infested fruit (0.71 %) was obtained from chilli which was statistically significant from other treatments except cabbage while the highest infested fruits (51.56 %) were attained in brinjal which was statistically identical to cauliflower (39.89%). There was no significant difference in insect infestation in tomato and soybean.

Knowledge Management: Report/Proceedings