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  DOI Prefix   10.20431


 

International Journal of Research Studies in Agricultural Sciences
Volume 4, Issue 11, 2018, Page No: 18-22

Occurrence and Evaluation of Insecticides for Control of Coffee Thrips (Diarthrothrips Coffeae) at Cheleleki, Southwest Ethiopia

Tamiru Shimales* , Desalegn Alemayehu

Ethiopian Institute of Agricultural Research, Jimma Agricultural Research Center, Jimma, Ethiopia.

Citation : Tamiru Shimales*, Desalegn Alemayehu*, Occurrence and Evaluation of Insecticides for Control of Coffee Thrips (Diarthrothrips Coffeae) at Cheleleki, Southwest Ethiopia International Journal of Research Studies in Agricultural Sciences 2018, 4(11) : 18-22.

Abstract

Ethiopia is the source of several economically important cultivated crops around the world and among these crops, Coffea arabica L. is the most important gift to Ethiopia. The average national production is very low. Biotic and a complex set of abiotic stresses are among the factors reducing coffee yield and quality. Diarthrothrips coffeae is one of the drought dependent insect and which defoliated the coffee leaves heavily during prolonged drought. This pest distributed and damaged coffee gravely in different coffee growing areas of the country. Due to the climate change, there is an increase in number of population, distribution and damage level of coffee thrips in Ethiopia. For occurrence of these insect assessment 20 -25 coffee trees per selected coffee farms were selected, and the percent incidence of Diarthrothrips coffeae ranged from 0.04% to 100%. To reduce the damage caused by this insect some organic insecticides evaluated as one component of integrated pest management. Five treatments including unsprayed plots were evaluated by using completely randomized block design with three replications at Cheleleki estate farm on naturally infested coffee field. The mortality percent of mixed treatment i.e. nimbecidine with detergent five days up to twenty one days after application resulted 100%. This treatment is more effective as compared to others in terms of thrips management and cost of control.


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