DIMBOA AS A CHEMICAL RESISTANCE FACTOR AGAINST THE EUROPEAN CORN BORER, OSTRINIA NUBILALIS (HUBNER) IN CERTAIN MAIZE GENOTYPES | ||||
| Egyptian Journal of Agricultural Research | ||||
| Article 10, Volume 75, Issue 1, March 1997, Page 97-103 PDF (1.84 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejar.1997.403148 | ||||
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| Authors | ||||
| ALI M. SOLIMAN1; SADEK E. SADEK2 | ||||
| 1Plant protection Research Institute, Agricultural Research Centre, Giza, Dokki, Egypt | ||||
| 2Field Crops Research Institute, Agricultural Research Centre, Dokki, Giza, Egypt | ||||
| Abstract | ||||
| The chemical resistance factor DIMBOA, (2.4 dihydroxy7methoxy-1.4 benzoxazin, 3 one), was determined in ten maize genotypes. Laboratory evaluation of resistance of these types against Ostrinia nubilalis was recorded. The relationship between DIMBOA and resistance degree was estimated showing the following results. There is a positive correlation between DIMBOA absorption (at 266 nm) and larval mortality percentage in 50% of the tested inbred lines. Sixty per cent of the tested lines showd a positive correlation between DIMBOA and per cent larval duration. Fifty per cent of these lines showed a negative correlation between DIMBOA and pupal weight. DIM-BOA correlated with the general rating of laboratory resistance in 60% of the tested maize inbred lines. DIMBOA may play an important role as a chemical resistance factor in 60% of the tested inbred lines (Gm. 9, Gm, 6, Gm22, Gm. 14, Gm. 2 and Sids 34), while (Sids 7, Gm. 13, Gm. 4 and Gm. 31) were not affected by DIMBOA content. | ||||
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