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Studies on the Natural Enemies of Sugarcane Top Shoot Borers.

A. K. M. Mustafizur Rahman
Department of Entomology, Bangladesh Agricultural University, Mymensingh

S. M. H. Kabir
Department of Zoology. Dhaka University, Dhaka.

Abstract/ Executive Summary:

The sugarcane top shoot borer, Scirpophaga monostigma Zeller is usually attacked by natural enemies. Natural enemies fall under two categories: (a) Biotic natural enemies and (B) Abiotic causes. Both factors play a vital role in keeping down the population of the pest. During present investigation, four parasites were found to attack the top shoot borer's egg, larvae and pupae. When the temperature was high and practically no rain the population level of the top shoot borer reached its maximum. During monsoon borer attack was fairly low.

Keywords: Sugarcane, Top shoot borer, Natural enemies

Location: BAU, Mymensingh

Start Date:

End Date:

Program Area: Pest Management

Commodity: Sugarcane

Objectives:

To find out the natural enemies of the sugarcane top shoot borer.

Methodology:

The sugarcane top shoot borer, Scirpophaga monostigma Zeller is usually attacked by natural enemies. During present studies intensive search was made throughout the sugarcane growing season for finding out the natural enemies of the sugarcane top shoot borer. The infested stems were regularly collected from Agricultural University Farm and examined very closely by splitting the same to detect the parasites. Egg parasites were detected from the egg masses that were collected from the infested plants and preserved in the laboratory. Natural enemies fall under two categories: (A) Biotic natural enemies and (B) Abiotic causes. Both factors playa vital role in keeping down the population of the pest.

Source of Information: Bangladesh J. Agril. Sci. 5 (1):97-100: 1978

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

A. Biotic natural enemies. During present investigation, four parasites were found to attack the top' shoot borer. Of them, one is an egg parasite, two of them are larval parasite, and the rest is a pupal parasite. All the parasites belong to the order Hymenoptera.

Abiotic causes: When the temperature was high and practically no rain the population level of the top shoot borer reached its maximum. During monsoon borer attack was fairly low. It was also concluded that infestation by the borer varies inversely with the rainfall, the less the rainfall, the greater the number of infested canes.

Knowledge Management: Journal