CONTROL OF SMUT DISEASE OF SUGARCANE BY CERTAIN CULTURAL PRACTICES AND CHEMICALS

Document Type : Original Article

Authors

1 Faculty of Agriculture, Cairo University, Giza, Egypt

2 Plant Pathology Research Institute, Agricultural Research Centre, Giza, Egypt

Abstract

The winter crops, clover, broad bean, lupin, chick pea, lentile and fenugreek and the summer crops, maize, grain sorghum and soybean were rotated with sugarcane in artificially infested soil. Longevity of teli‌ospores bloassayed by infection in sugarcane was examined. No infec‌tion occurred and spores either died or germinated in the absence of the host; however, the remaining live spores were below the infective poten‌tial. Root exudates of these crops drastically decreased teliospores ger‌mination. While, that of sugarcane (NCo 310, susceptible variety) was nearly the same like the control (in distilled water). Intercropping of these crops with sugarcane in infested potted soil suppressed and/or decreased infection to one third its level in the control for winter and summer crops, respectively. However, the use of dip inoculation technique of seed-cuttings prevented the control effect of these crops. The results suggest the use of crop rotation containing such crops and intercropping for disease con‌trol. In vitro, Benlate 50%, Bayleton 25%, Vitavax/captan 75% and Tilt 10% at 5 ug/m1 and above, in a descending order were effective against mycelia' growth and Benlate was fungitoxic. In pot experiment, Benlate, Bayleton and Vitavax/captan prevented infection in artificially inoculated seed cuttings. Chemical treatment is feasible under high dis‌ease incidence.

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