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Potash and Sulphur Fertilizer Influencing Insect Infestation on Onion

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

K. M. Nasiruddin
Department of Horticulture, Bangladesh Agricultural, University, Mymesingh.

Abstract/ Executive Summary:

An investigation was made to find out the effects of potash (K) and sulphur (S) fertilizers on the infestation of onion Inset pests. Among the six pests that attacked onion plants in the field, the aphids and cutworms were greater in number than others. The incidence of these insects on onion showed significantly different population levels at different doses of K and S fertilizer. Higher dose of these fertilizers, ranging from 50-100 kg/ha in combination, produced significant reduction of infestation of these pests.

Keywords: Potash, Sulphur fertilizers, Infestation,Onion.

Location: Horticulture Farm of Bangladesh Agricultural University, Mymansingh

Start Date: 00-12-1988

End Date: 00-05-1989

Program Area: Crop-Soil-Water Management

Commodity: Onion

Objectives:

The present work was undertaken with special reference to the effect of K and S fertilizers against insect pest infestation.

Methodology:

The research was carried out in the Horticulture Farm of Bangladesh Agricultural University, Mymansingh between December, 1988 and May. 1989. The individual plot size was 2 x 1 m and experiment was laid out in split plot design with 3 replicates, where potassium was used in the main plots and sulphur in the sub-plots. The doses of potassium (as muriate of potash) were 0, 50 and 100 kg/ha and thoseof sulphur (as gypsum) were 0, 30, 50and 70 kg/ha. Tripie superphosphate (TSP) @ 200 kg/ha was applied to the soil during final land preparation. Urea@ 200 kg/ha and the above rate ofmuriate of potash were applied in 3 instalments as basal, 40, and 60 days after sowing. About 40-day old seedlings of onion of Faridpur Bhatti cv. were transplanted at a spacing of 12 em x 10 em on December 29, 1988. intercultural operations, and irligation were done as and when necessary but no pesticide was applied. The data on insect population and infestad leaves per plant ware recorded,statistically analysed, and the means were compared following OM RT.

Source of Information: Bangladesh J.Agril. Sci. 20 (1): 125-129, January, 1993 ISSN 0379-4296

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The incidence of these insects on onion showed significantly different population levels at different doses of K and S fertilizer. Higher dose of these fertilizers, ranging from 50-100 kg/ha in combination, produced significant reduction of infestation of these pests.

Knowledge Management: Journal