About Pencycuron article： Effect of certain agrochemicals on the efficacy of fungicides against damping-off of cotton

Author(s): EL-SAFTY,N.A.,FATMA M.GHALLAB,S.S.RAMSES,A.A.EL-SOKKARY,HANUA A.ATIA AND NAHED M.MORSY.

This study was carrierd out to investigate the interaction between the cotton seed dresser fungicides moriceren, moriceren-combi , Pencycuron - euparen rizolex-T and vitavax-300. the fertilizer superphosphate and herbicides cotoran, goal and stomp in a soil infested with Rhizoctotnia so lani Kuhn under suitable conditions fur infection in the greenhouse. All fungicides significantly reduced the infection. Pencycuron euparen was the most effective compound. while Pencycuron a one was the east effective. The efficacy of Pencycuron n mixtures (Pencycuron-combi and Pencycuron euparen) was better than moriceren alone. Superphosphate had no significant effect on the efficacy of the fungicides. Herbicides a one or in comb nation with superphosphite had no effect on cotton damping off The interaction between fungicides and herbicides improved Pencycuron efficacy when goal was applied whi e stomp decreased the effect of Pencycuron- euparen. In the presence of superphosphate, the interaction between fun gicides and herbicides indicated] that the effect of Pencycuron was reduced with cotoran, while a little improvement n efficacy occurred with goal and stomp Pencycuron-combi lost its effect gradually with goale , but improved with cotoran through four weeks, their a slight reduction in efficacy was observed. No marked change was noticed in the efficacy of Pencycuron-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 vitavax 300 at the beginning of the experiment. In spite of vitavax 300 and its combinations wit[) cotoran and goal started with approximately equal efficacies, vitavax 300 alone arid with cotoran lost their effects gradually to become similar or to vitavix + stomp Generally, in the presence of an perphosphate, Vie most effective treatments were Pencycuron euparen 4 goal, Pencycuron-comb + cotorarn, Pencycuron-euparen alone. Pencycuron + goal arid Pencycuron + stomp, respectively Without Superphosphate, there is no change in efficacies of fungicides except the reduction of at fleecy in case of Pencycuron + stomp and Pencycuron combi + cotoran)


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