STUDIES ON THE EFFECT OF SOME GROWTH REGULATORS ON THE INCIDENCE OF LEAF SPOT, ROOT AND POD ROT DISEASES AND YIELD OF PEANUT | ||||
| Journal of Plant Production | ||||
| Article 14, Volume 27, Issue 8, August 2002, Page 5317-5326 PDF (1.11 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2002.256242 | ||||
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| Author | ||||
| M. A. I. Khalil, | ||||
| Onion, Garlic & Oil Crops Res. Dis. Dept., Plant Pathology Res. Institute, Agric. Res. Center, Giza, Egypt. | ||||
| Abstract | ||||
| Growth regulators. i.e. Gibberellic acid (GA3' Cicocel (CCC) and Indole Acetic acid (IAA) reduced the linear growth of Sclerotium rolfsii and Fusarium moniliforme and the reduction increased as the growth regulators concentration, was increased, on contrast with Macrophomina phaseolina and Aspergillus nevus. However, a reduction in sclerotial formation was noticed with all concentrations, compared with untreated control with M. p < /em>haseolina and S. ro/fsii. A. nevus and F. moniliforme sporulation decreased as the concentrations of growth regulators increased and it was fluctuated with some increase at the rate of 1000 ppm of all tested growth regulators. The growth regulators effect were investigated in field experiments under naturally infection conditions in South·Tahrir, 8ehira Governorate, during two successive seasons, 1999 and 2000. Spraying peanut with growth regulators significantly reduced leaf spots disease compared with untreated control in both successive seasons. The same effect in reducing peanut root rot was noticed as well as yield increase (gram/plant). Indole Acetic acid, Cicocel followed by Gibberellic acid were effective in reducing pod rots, brown lesions (Rhizoctonia solam), pink discoloration (Fusarium moniliforme) and breakdown caused by some soilborne fungi. Generally, IAA was the best in reducing leaf spots. root and pod rots followed by GA3 then CCC which was the least effective one. | ||||
| Keywords | ||||
| Growth regulators; leaf spot; Root and pod rots; Peanut | ||||
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