Efficiency of natural extract, Aaloe barbadensis gainst two species of phytophagous mites

الملخص EN

-Three different extracts of Aloe barbadensis Miller leaves were evaluated for acaricidal activity against adult female of mites, Tetranychusurticae and Cenopalpuspulcher by spray bioassay.

At 72 h after treatment the acetone extract showed the strongest acaricidal activity with LC50 value of 105 ppm while, the LC50 values for ethanol and water extracts were 322 and 366 ppm for T.

urticae, respectively.

LC50 values were 80, 289 and 320 ppm at the same order for extracts against C.

pulcher.

The acetone extract was fractionated using GC-MS analysis to twenty-three fractions.

Using LC50 of acetone extract a reduction in longevity of adult females of both species occurredas 14.45 and 12.37 days for T.

urticae and C.

pulcher, respectively.

While, control treatment was 20.27 and 16.18 days for T.urticae and C.

pulcher, respectively.

Acetone extract caused significant reduction on fecundity.

Deterrent index were 43.61 and 31.29 % for T.urticae and C.

pulcher, respectively.

The obtained results indicated that A.barbadensis has a great potential as a botanical acaricide for T.

urticae and C.

pulcher control.

Conclusively, from these results of the present study show great potential and must be more advanced for developing Aloe extracting based mite control products