DefinePK

Abstract

This study was conducted to evaluate the efficacy of five pesticides residue toxicity abamectin 1.8 ec, bifenazate 48 sc, hexythiazox 10 wp, fenbutatin oxide 55 sc and biopesticides tondexir 80 ec against two spotted spider mite Tetranychus urticae and the predator Scolothrips longicornis under laboratory condition. The results showed that bifenazate to be the most effective pesticides against the mite. The pesticides residue of bifenazate, abamectin and hexythiazox caused high mortality of two spotted spider mite through rates that ranged between 89.59 to 100% and this was significantly greater than the control. Furthermore, the results also showed pesticide residues of the tondexir very low mortality ratios 5.33 and 9.33% respectively after 7 days of the treatment. Hexythiazox and bifenazate were toxic to the predator up to two weeks after treatment and the mortality rates caused in low and high rates was 68.07, 78.33% and 39.55, 37.88% respectively. The result showed the mortality on leaf disks treated with tondexir, fenbutatin oxide was not significantly than control on untreated leaf disks at any time after application.