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Effect of Pesticide Spray on Pollinators, Natural Enemies and Yield of Mustard

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

S.N. Alam
Entomology Division, BARI, Gazipur

Abstract/ Executive Summary:

A field experiment was carried out at the Entomology Research field during 2013-2014 to find the effect of insecticide spraying on pollinators, natural enemies and yield of mustard. The highest no. of honey bee (22.75) was observed in non-sprayed plot which statistically differed from all other treatments. No significant difference on honey bee population was observed on spray and adjacent to the spray plot. No significant differences among the natural enemy population on different treatments were also observed. The lowest aphid population was observed on spray plot (4.75) which was statistically significant from other treatments. The highest yield was observed in non- spray plots (1.78 t/ha) followed by adjacent to spray plots (1.52 t/ha).

Keywords: Impact, Honey bee, Natural enemy, Pesticides, Yield of mustard

Location: Entomology Research field, BARI

Start Date: 00-00-2013

End Date: 00-00-2014

Program Area: Pest Management

Commodity: Mustard

Objectives:

To determine impact on insecticide spray on honeybee and natural enemy population and it effect on the yield of Mustard

Methodology:

The study was carried out at the Entomology research field, BARI, Gazipur to collect data on pollinator number and natural enemy population. The treatments were as follows: T₁: Sprayed plot (two times spray of Emamectin benzoate @ 0.5ml/L at an interval of 7 days), T₂: Adjacent to sprayed plot, T_3: Non sprayed plot (100 m apart from the spray plot where no insecticide spraying was done). The experiment was laid out in RCBD with 4 replications. Data were recorded on: Honey bee population, natural enemy population (syrphid fly), aphid population and yield of mustard. Number of honey bee and natural enemies were recorded from randomly selected three I x I m areas per treatment replicates. Number of aphid was counted from 10 cm area of infested plants covering lrn x I m sampling area of mustard field. Yield data were recorded at harvest.

Source of Information: Annual Research report,BARI, Gazipur,2013-2014

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The highest number (22.75) of honey bee was observed in non-spray plot which was statistically differed from all other treatments. No significant difference was observed on spray and adjacent to the spray plot. There were no significant difference among the natural enemy population on different treatments. The lowest aphid population (4.75) was observed on spray plot which was statistically significant from other treatments. The highest yield of 1.78 t/ha was observed in non- spray plot which was statistically significant from other treatments followed by adjacent to spray plot (1.52 t/ha).

Knowledge Management: Report/Proceedings