EFFECT OF CERTAIN AGROCHEMICALS ON THE EFFICACY OF FUNGICIDES AGAINST DAMPING-OFF OF COTTON | ||||
| Egyptian Journal of Agricultural Research | ||||
| Article 11, Volume 79, Issue 4, October 2001, Page 1399-1412 PDF (4.1 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejar.2001.320904 | ||||
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| Authors | ||||
| NOR EL-DIN A. EL-SAFTY; FATMA M. GHALLAB; SAMY S. RAMSES; ABDEL-NASER A. EL-SOKKARY; HANUA A. ATIA; NAHED M. MORSY | ||||
| Central Agricultural Pesticides Laboratory, Agricultural Research Center, Dokki, Giza, Egypt | ||||
| Abstract | ||||
| This study was carried out to investigate the interaction between the cotton seed dresser fungicides monceren, monceren-combi, monceren-euparen, fixates-7 and vitavax-300, the fertilizer superphosphate and herbicides cotoran, goal and stomp in a soil infested with Rhizoctonia so- tani Kuhn under suitable conditions for infection in the greenhouse. All fungicides significantly reduced the infection. Monceren-euparen was the most effective compound, while monceren alone was the least effective. The efficacy of monceren in mixtures (monceren-combi and moncereneuparen) was better than monceren alone. Superphosphate had no significant effect on the efficacy of the fungicides. Herbicides alone or in combination with superphosphate had no effect on cotton damping-off. The interaction between fungicides and herbicides improved monceren efficacy when goal was applied, while stomp decreased the effect of monceren-euparen. In the presence of superphosphate, the interaction between fungicides and herbicides indicated that the effect of monceren was reduced with cotoran, while a little improvement in efficacy occurred with goal and stomp. Monceren-oombi lost its effect gradually with goal, but improved with cotoran through four weeks, then a slight reduction in efficacy was observed. No marked change was noticed In the efficacy of monceren-euparen when the tested herbicides were applied, except In case of stomp which reduced fungicides effect after 3 weeks. Rizolex-T and its combination with the herbicides started with nearly equal efficacies, but in the case of goal, the efficacy was reduced between the 2nd and the 3rd week. Application of stomp reduced the efficacy of vitavax300 at the beginning of the experiment. In spite of vitavax-300 and its combinations with cotoran and goal started with approximately equal efficacies, vitavax-300 alone and with cotoran lost their effects gradually to become similar to vitavax + stomp. Generally, In the presence of superphosphate, the most effective treatments were monceren-euparen + goal, monceren-oombi + cotoran, monceren-euparen alone, monceren + goal and monceren + stomp, respectively. Without superphosphate, there is no change in efficacies of fungicides except the reduction of efficacy in case of monceren + stomp and monceren-combi + cotoran. | ||||
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