DUCED RESISTANCE TO SPIDER MITE Tetranychus urticae Koch INFESTATION IN COTTON AND SOYBEAN PLANTS. | ||||
| Journal of Plant Protection and Pathology | ||||
| Article 5, Volume 27, Issue 1, January 2002, Page 625-630 PDF (614.12 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jppp.2002.252970 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| H. A. Taha,1; M. A. Ahmed2; Ahlam A. Younes1 | ||||
| 1Plant Protection Res. Inst., Dokki, Egypt. | ||||
| 2Fac. of Agric. Assuit Al-Azhar Univ. | ||||
| Abstract | ||||
| Studies were done to estimate the relationship between initial damage of spider mite Tetranychus urticae Koch and induced resistance in cotton and soybean plants. Spider mites raised on plants that had been damaged by a previous bout of mite feeding and on control plants that were previously not exposed to mites. The results indicated that the mite populations grew more rapidly on new growth of the seedlings whose cotyledons were undamaged than on new growth whose cotyledons had been damaged previously by spider mites. The ratio of the population on exposed plants to the population on controls was about 1 : 2 or more. Results of these works identify a new source of resistance, could be used as a management tool at the field. | ||||
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