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A preliminary biological control study on Tetranychus urticae Koch on rose bushes (Acari: Tetranychidae
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Abstract: A preliminary study was conducted during two successive seasons on rose bushes at Orman garden (Giza Governorate) to control the two-spotted spider mite, Tetranychus urticae KOCH by releasing the predatory mite,Phytoseiulus macropilis (Banks), at the rate of 20or 40 individuals/bush using gelatin capsules or bean leaflets harbouring the predator individuals. In 2003 season the predator was lately released on April the 2nd .Few predators were recoded on the release bushes during the different post- counts probably due to the prevailing unfavourable environmental conditions where several hot spells coincided the time of predator release which might negatively affected the predator activity.In2004 season, the predator was eariy released on February the 10th . Satisfied results were obtained. Releasing the predator using gelatin capsules or bean leaflets at the rate of 20 or 40 individuals/bush greatly reduced the T. urticae population after 4 weeks from the predator release. Mean reduction of the pest population over the experimental period was 76% (20 predators /bush) and 82% (40 predators /bush) when using gelatin capsules and 85 and 87% when using bean leaves, respectively.
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| Publication year |
2004
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| Pages |
365-371
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| Organization Name |
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| Author(s) from ARC |
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| External authors (outside ARC) |
El-Sayed,K. M
معهد بحوث وقاية النباتات
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| Publication Type |
Researsh & Applied Activities
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