Efficiency of some acaricides on the two spotted spider mite Tetranychus urticae koch. , infesting eggplant and pepper under laboratory and field conditions

الملخص EN

The aim of this study was to investigate the efficiency of six acaricides against the two spotted spider mite, T.

urticae, infesting eggplant and pepper plants during the two growing season, 2016 and 2017, under laboratory and field conditions.

The tested acaricides namely: abamectin 1.8% EC, buprofezin 25% WP, Abamectin 5% EC, chlorfenapyr 24% SC, hexythiazox 5% WP and fenpyroximate 5% EC.

Abamactin 1.8% was the most effective acaricides followed by buprofezin, abamactin 5% , chlorfenapyr, hexythiazox and fenpyroximate, respectively.

The LC₅₀ values were 1, 5, 10, 45, 88 and 100 mg/l, respectively.

The tested acaricides indicated significant reduction for population of T.

urticae under field conditions during the first and second seasons.

The reduction percentages were 77.1, 58.8 and 44.4% , in the first season (2016) and 71.47, 64.5 and 53.6% in the second season (2017) for abamectin 1.8% EC, fenpyroximate and hexythiazox, respectively on eggplant.

On the other hand, Buprofezin, chlorfenapyr and abamectin 5% showed significant reduction in population of T.

urticae on pepper plant, in the first and second seasons (2016, 2017) which recorded 71.5, 64.16 and 59.88% , 77.8, 66.85 and 66.4% , respectively.