Evaluation of fenazaquin 20 percent SC for the control of African red mite, Eutetranychus africanus (Tucker) in durian
1999
Amnat Chomchajchawarn | Kittiphum Guywipakbanyai | Singhadej Techanaparuks | Veerayut Jirapanich | Sayomchai Singhara Na Ayuthaya(Dow AgroSciences (Thailand) Ltd., Bangkok (Thailand))
African red mite (ARM) is one of the most serious sucking pest of durian in Eastern part of Thailand. It attacks and damages the durian leaves. The infested durian leaves lose chlorophyll and dry up prematurely. At present the resistance to some acaricides were observed in the field. The new approach of alternate application with different mode of action of acaricide or even new acaricide might be needed to study to provide some alternatives for the future. Two trials were conducted in Chanthaburi province, Eastern part of Thailand to evaluate the efficacy and phytotoxicity of fenazaquin 20 percent SC at the rate of 5, 10 and 15 ml/20 liters of water compared to untreated treatment and standard treatment, propargite (Omite) 30 percent WP at 30 g/20 liters of water. One application of acaricide was carried out after ARM outbreaked. The number of ARM were counted by using hand lens on 20 early mature leaves per plant (1 plant = 1 replication) and evaluated before and 1, 3, 5, 7, 14, 21, 28 days after application. Fenazaurin at 5, 10, 15 ml/20 liters and propargite gave the average percent control at 89.2, 94.6, 97.8 and 90.6 at 28 days, respectively.
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