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The Role of Some Chemical Insecticide and fungal Suspension of Beauveria bassiana in control The Dust Spider Mite Oligonychus afrasiaticus (Acari: Tetranchidae) in Date Palms | ||
| basrah journal of science | ||
| Article 1, Volume 25, Issue 2, 2007, Pages 103-112 PDF (0 K) | ||
| Authors | ||
| Nasser H. Al-Dosary; and Ala N. Ahmad; Hayat M. R. Mahdi | ||
| Abstract | ||
| The results of lab study showed that the treatments by the mixture (Byby5%20EC insecticide + fungal isolate Beauveria bassiana(BI)) & Byby%20EC insecticide alone was the best treatments in eggs mortality which amounted to % 41.9 & 44.5 respectively 72 hrs after treatment as well as those treatments gave the best results in killing the immatures which was about % 68.3 & 69.8 (24) hrs after spraying &% 87.3& 85.9 (72) hrs after spraying ,& those treatments gave the same results for the nymph killing percentage which was % 87.1& 85.2 (72)hrs after spraying, respectively . while concerning the adult stage ,the rate of killing reached %85.3& 86.3 (72)hrs after spraying ,using the mixture (Byby%20EC insecticide + fungal isolate B. bassiana(BI)) and byby%20EC insecticide alone, respectively . In terms of field results , treatment by the mixture ( byby%20EC insecticide + B. bassiana(BI)isolate)) showed the best results in eggs number reduction , from (50)eggs/fruit to 18.7, 24, 23.7, 25& 26.7 egg/fruit after 1, 3, 7, 14 & 30 days of treatment respectively with a morel significant difference . while there was no significant difference between the two treatments to limit population density of adults 1,3,7 & 30days after treatment, where there was a moral significant difference between the two treatments (14) days after spraying . the treatment by mixture (byby%20EC insecticide + B. bassiana(BI)isolate ) and Byby%20EC insecticide gave the best results in decreasing the adults number ,decrease percentage was 16, 19 & 17.6 mite/fruit , respectively in compare with the average of its density prior to the treatment which was 58.7, 47.3 & 51 mite/fruit , respectively | ||
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