VARIETAL RESISTANCE: BIOLOGICAL EVALUATION AND SCREENING OF CERTAIN RICE ENTRIES AGAINST THE RICE STEM BORER, CHILO AGAMEMNON BLES. | ||||
| Egyptian Journal of Agricultural Research | ||||
| Article 16, Volume 75, Issue 1, March 1997, Page 1655-1723 PDF (2 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejar.1997.403186 | ||||
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| Authors | ||||
| ALI M. SOLIMAN; SAADIA ABDEL-BASIR | ||||
| Plant protection Research Institute, Agricultural Research Centre, Dokki, Giza, Egypt | ||||
| Abstract | ||||
| Sixteen rice varieties and promising lines were evaluated at two growth stages, for resistance to feeding by the rice stem borer; Chilo agamemnon Bles. larvae using laboratory methods. Study reported here showed that :- A)At tillering stage Larval mortality: Giza 167, GZ 4294-10-2, Todorokiwase, GZ 42567-4-7 and GZ 4122-23-4-2 were the most resistant entries causing from 20.0 to 55.6% larval mortality. Larval duration: Todorokiwase, GZ 4294-10-2 and Giza 176 were the most resistant entries resulting in longest developmental periods of larvae ranging from 32.3 to 35.2 days. Pupal duration: Todorokiwase and Giza 176 were the most resistant entries resulting in longest duration periods of pupae ranging from 7.0 to 7.7 days. Pupal weight: Todorokiwase and Giza 176 appeared to be the most resistant entries resulting in least weights of pupae ranging from 40.2 to 24.6 mg. Adult longevity: Telle Hamsa and Toride-1 were the most resistant entries with longest adult longevity ranging from 9.0 to 7.6 days. B)At flowering stage Larval Mortality : GZ 4071-16-2-1 and Kagahikari were the highest resistant entries causing 42.6 and 35.0% larval mortality. Larval duration:GZ 4071-16-2-1 and Kagahikari were the highest resistant entries with 34.6 and 33.2 days as longest duration of larval feeding. Pupal duration: GZ 181 and Kagahikari were the highest resistant entries with longest pupal duration ranging from 8.9 to 7.2 days. | ||||
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