Effect of acaricide, Envidor speed, on figs spider mite, Eotetranychus hirsti (Acari: Tetranycidae)

Subject Areas : Plant Protection

Mehdi Gheibi ¹ , Yazdanbakhsh Taheri ²

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Received: 2014-10-26 Accepted : 2014-12-27 Published : 2014-11-22

Keywords:

Abstract :

Fig spider mite, Eotetranychus hirsti (Acari: Tetranychidae) is a serious pest of figs (Ficus carica L.) in Iran and other fig growing areas in the world. Under low mite infestation level, the leaves show small transparent patches while under high infestation the leaves with yellowish-green appearance drop down prematurely. Effects of three doses (0.3, 0.4, 0.5 per thousand liters) of new acaricide envidor speed (spirodiclofen 222+abamactin, 18g/l SC) evaluated in comparison with three other acaricides i.e. spirodiclifen (0.5 per thousand liters), bromopropylate (1.5 per thousand liters) and abamectin (0.5 per thousand liters) on egg and adult stages of fig spider on Ezmir variety of fig orchards in Agricultural Research Center (ARC) of Estahban-Fars, during 2014. Five replications for every treatment done through randomized complete block design. 50 leaves were plucked from each block at random and number of egg and adult of Eo. hirsti recorded through ten sampling interval, one day before, 1, 3, 5, 7, 10, 15, 20, 24 and 30 days after chemical applications. The efficacy of the acaricides was calculated by Henderson and Tilton formula. The data were subjected to ANOVA and the means were analyzed by Duncan test. The results showed that after 5 days, three dose of envidor speed have a good effect than bromopropylate and abamectin. While the treated trees with bromopropylate and abamectin have a significant population of egg mite 16.6 and 22.5 eggs respectively, after 30 days. The mean number of eggs in treated trees with bromopropylate and abamectin increased after 15 days. Efficacy of bromopropylate and abamectin showed an absolute control on adult mite after one day and mean mortality was 93.12 and 98.12 percent, respectively. Different concentration of envidor speed showed high efficacy after 3 days and for 03, 0.4 and 0.5 mortality were 94.99, 94.65 and 100%, respectively. Spirodiclofen showed high efficacy after 7 days. The efficacy of bromopropylate and abamectin decreased after 15 days and were 47.13 and 72.43% after 30 days, respectively. The results showed that envidor speed has a longer and good effect on egg and adult form of fig spider mite.

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