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Survey and Documentation of Insect Pests of Wheat and Determination of Their Damage Severity Along with the Associated Natural Enemies

T. Jahan
Scientific Officer
WRC, Nashipur, Dinajpur.

M. M. R. Shah
Scientific Officer
WRC, Nashipur, Dinajpur.

Abstract/ Executive Summary:

A survey was conducted at the research field of Wheat Research Centre, Dinajpur and at some farmers’ field in Dinajpur region during 2009-10 to record the status of insect pests attacking wheat and their associated natural enemies. Results revealed that in both research and farmers' fields several insect pests viz. wireworm, aphid, stem borer, termite, hairy caterpillar, armyworm, stinkbug, grasshopper, green leaf hopper (GLH) and red cotton bug were found to attack the crop at different growth stages. With a few exceptions the population of insect pests and natural enemies was low in wheat. Among the insect pests, aphid population was prominent at grain filling stage and heading stages of the crop. Among the natural enemies, ladybird beetle was also dominant in heading and grain filling stages of the crop.

Keywords: Insect pests, natural enemies, wheat

Location: Dinajpur

Start Date: 15-11-2009

End Date: 05-04-2010

Program Area: Pest Management

Commodity: Diseases and insects

Objectives:

To document the infestation status of different insect pests of wheat along with their associated natural enemies.

Methodology:

To assess the presence of insect pests and their natural enemies, regular surveys were conducted at seedling, tillering, heading and grain filling stages of wheat during rabi season of 2009-2010 in Dinajpur region. In-situ data collection was done in farmers field and research field of Wheat Research Centre, Dinajpur. Plots were selected randomly and sampling was done by using a 1m x 1m quadrant. Out of 180 samplings, 90 were done in the research field and other 90 were in the farmers’ fields. For assessing the presence of insects, the number of infested plants as well as the number of insect pests and their natural enemies were counted without interrupting them in each quadrant. But for recording aphid population, 5 randomly selected plants from four corner and middle of each quadrant were collected in polythene bag and carried them in the laboratory and then the number of aphids per plant was counted.

Source of Information: Annual Report 2009-2010, Entomology Division, BARI, Gazipur

Article Link (Online Journal):

Funding Source:

1.	Budget: 30,000

Total Budget (Tk.) : 30,000

Achievement/Findings:

Wireworm, aphid, stem borer, termite, hairy caterpillar, armyworm, stinkbug, grasshopper, green leaf hopper (GLH) and red cotton bug were found to attack the crop at different growth stages. With a few exceptions the population of insect pests and natural enemies was low in wheat. Among the insect pests, aphid population was prominent at grain filling stage and heading stages of the crop. Among the natural enemies, ladybird beetle was found dominant in heading and grain filling stages of the crop.

Knowledge Management: Report/Proceedings