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Field Parasitism of Sugarcane Top Shoot Borer and Stem Borers Eggs

M. A. Alam
Sugarcane Research and Training Institute, Ishurdi, Pabna, Bangladesh.

A. Mannan
Sugarcane Research and Training Institute, Ishurdi, Pabna, Bangladesh.

M. A. H. Miah
Sugarcane Research and Training Institute, Ishurdi, Pabna, Bangladesh.

Abstract/ Executive Summary:

A survey was conducted on natural parasitisation of eggs of Top shoot borer and Stem borers of sugarcane. Telenomus dignoides Nixon and Tetrasiichus sp. parasitised TSB eggs where Telenomus sp. alone parasitised SB eggs. Parasitisation in both the borers ranged from 0 to 100 percent. Mean rate of parasitisation was 43.83 percent in TSB and 47.84 percent in SB during the year 1984.

Keywords: Parasitism, Sugarcane, Shoot borer, Stem borers eggs

Location: Sugarcane Research and Training Institute, Ishurdi, Pabna, Bangladesh.

Start Date: 00-00-1984

End Date: 00-00-1984

Program Area: Pest Management

Commodity: Insecticide

Objectives:

To survey of natural egg parasitism in the field which will enable to determine the need of insecticide sprays, parasite conservation or both through monitoring.

Methodology:

Egg masses of TSB were collected from a specific plot of 1.64 hectare area twice a week throughout the cropping season when egg masses were available. Egg masses laid on the leaves were clipped of and put into test tubes in the laboratory for 15 days when the eggs hatched or parasites emerged from them. Later the hairs were cleaned and soaked in 5% KOH solution to soften the egg shells and studied under microscope to discriminate parasitised and unparasitised eggs. In case of SB a field net cage (3.65m x 1.83m x 1.83m) was erected in the cane field where natural attack and breeding of SB was encouraged. Egg masses laid on leaves were clipped off twice a week during the SB infestation period. The process of dismantling the egg mass were similar to that of TSB.

Source of Information: Bangladesh Journal of Sugarcane. Vol: 7, pp: 52-54, ISSN 1991-8925, July-1985

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Natural parasitisation of TSB and SB eggs by different parasites was above 43%. These parasites if conserved according to the booster technique as devised for TSB may control both the pest species. Further work may suggest some modification of the technique of booster for stem borer.

Knowledge Management: Journal