ISHS Acta Horticulturae 492: I International Symposium on Cucurbits
BIOLOGICAL CONTROL OF THRIPS TABACI LINDEMAN (THYSANOPTERA: THRIPIDAE) BY AMBLYSEIUS CUCUMERIS (OUDEMANS) (ACARINA: PHYTOSEIIDAE) ON GREENHOUSE CUCUMBER IN ADANA, TURKEY |
| Authors: | C. KAZAK, K. KARUT, S. YILDIZ, E. SEKEROGLU |
| Keywords: | Thrips tabaci, Amblyseius cucumeris, biological control, cucumber |
| DOI: | 10.17660/ActaHortic.1999.492.20 |
| Abstract:
Biological control of Thrips tabaci was studied on greenhouse grown cucumbers by using predatory mite, Amblyseius cucumeris. Trials were conducted on cv. Kahya of cucumber in 1995, and on cv. Kahya and cv. Özde in 1996. In both years plot size consisted of 3 rows of 40 plants for each predator release and non-release control plots. Predators were released at a rate of 4–5 individuals per plant as soon as thrips were detected on host plants. In both years predator was able to bring thrips populations down to low levels. Immature populations of thrips reached to a peak of about 260/leaf in non-release control plots but never exceeded 160/leaf on cv. Özde and 80/leaf on cv. Kahya. Adult populations of thrips were also higher in control plots compared to predator released plots. In all plots age distribution of thrips populations were similar (85–90 % immatures, 10–15 adults), however the low numbers of immatures in predator release plots indicated that predation was heavier on immatures. A. cucumeris was more effective on cv. Kahya compared to cv. Özde. This might be due to an allowance of plant characteristics to the predator to prey more efficiently. | |
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