BIOLOGICAL CONTROL OF TETRANYCHUS URTICAE KOCH ON WATERMELON IN OPEN FIELD AND GREENHOUSE BY USING THE PREDATORY MITE SPECIES PHYTOSEIULUS PERSIMILIS (A.-H.) | ||||
Egyptian Journal of Agricultural Research | ||||
Article 15, Volume 87, Issue 4, December 2009, Page 1057-1062 PDF (223.2 K) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/ejar.2009.198819 | ||||
View on SCiNiTO | ||||
Authors | ||||
NAZEH M. ABDEL-WAHED; KARM M. EL-SAYED; MONA S. EL-GHOBASHI | ||||
Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt | ||||
Abstract | ||||
Biological control of the two-spotted spider mite, Tetranychus urticae Koch in Behera Governorate on watermelon field and greenhouse are possible by using the predatory mite, Phytoseiulus persimilis (A.-H.). The predacious mite was released at three levels 20, 30 and 40 individuals/bit in open field, while was released in greenhouse at one level with 30 individuals/bit, the best one in the level C (40 individuals/bit) followed by B and A levels, respectively. The percent reduction of T. urticae population in open field reached 98.25% after seven weeks from released at level C (40 individu-als/bit), while reached 94.82 and 92.38% at levels B and A, respec-tively. The reduction percentage of T. urticae in greenhouse at rate 30 individuals/bit was 98.83% in the end of experiment. This re-sults indicated that the possibility of this predator to control T. urti-cae on watermelon in open field and greenhouse. | ||||
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