The investigation of toxicity of phenpropathrin against Tetranichus urticae in the melon farms

Melon is the important crop in the Torbat ejam, Taybad, Fariman and Khaf from Razavi Khorasan. More than ۱۰۰,۰۰۰ hectares melons have planted in these areas. Many insects were reported as serious pests on the melon, contain Myopardalis pardalina, Dacus ciliates, Epilichna chrysomelina, Acytopeus curvistorius and Tetarnychus urticae. In this research, toxicity of phenpropathrin against T.urticae was evaluated in the spring and winter ۲۰۱۸ at the farms of around Torbate jam. Final concentration was ۰ (control), ۵۰۰, ۱۰۰۰ and ۱۵۰۰ ppm. Spraying was done in the early morning and three replicate were done for every treatments. Results showed that population acari in the toxic treatments were significantly reduced in comparison to control. The amount of reduction was ۵۲, ۸۸ and ۹۲ percent in the ۵۰۰, ۱۰۰۰ and ۱۵۰۰ ppm, respectively. Also, there was significant difference between ۵۰۰ with ۱۰۰۰ and ۱۵۰۰ ppm. Conclusion of current study is that the concentration of ۱۰۰۰ ppm of phenpropathrin is appropriate dose to recommendation for controlling of T.urticae in the melon farms.

کلیدواژه ها:

Acaricide ، Concentration ، Insect ، Population ، Treatment