Resistance Of Different Wheat Cultivated Varieties And Key Control Techniques To Wheat Sharp Eyespot

1. Indoor toxicity measurement for different sharp eyespot of wheat microbicidesThe paper studied the sensitivity baselines of Rhizoctonia cerealis which caused the sharp eyespot of wheat to 4 fungicides and the selection of fungicides for controlling the disease.Using the method of hypha growth rate we tested the anti-fungal activity of 6 fungicides to Rhizoctonia cerealis. Rhizoctonia cerealis of 4 strains of bacteria in nuclear fungicides sensitivity of the research results show that the level of Rhizoctonia cerealis nuclear sensitivity of different level of fungicide. Measured fungicide, tebuconazole on sharp eyespot of wheat, Kaiser high antibacterial activity, their sensitivity EC50 and EC90 are 0.07173 mg/1 and 2.67415mg/1 respectively. Rhizoctonia cerealis of nuclear AnKe sensitivity for the worst with the EC50 is 1.399μg/ml. The listed on Rhizoctonia cerealis is nuclear bacteria antibacterial activity. But it can only inhibit the growth of bacteria, not restrain linear sclerotia germination, the the mycelia which was processed by tebucoruzole change greatly, making the irulence of the mycelium decline.This paper also studies the Rhizoctonia cerealis nuclear mushroom relevan biological properties.2 The Inhibition of 6 Fungicides to Rhizoetonia cerealis Vander Hoeven and the influence of 6 fungicides to the morphology characters of Rhizoctonia cerealisThe Paper studied the inhibition of 6 fungicides to Rhizoetonia cerealis Vander Hoeven of which caused the sharp eyespot of wheat and the influence of 6 fungicides to the morphology of Rhizoetonia cerealis Vander Hoeven.The results of the inhibition of 6 fungicides to Rhizoetonia cerealis Vander Hoeven showed that the inhibition of different types of fungicides was significantly different. To all fungicides, Tebuconazole appeared very high activity in vitro with its average EC50 at 0.035ug/ml respectively,while the activity of Ankedimethomorph)against the pathogen was the lowest with EC501.399ug/ml.Another fungicide also showed respectively high activity to all isolates of the fungous.The paper studied also the influence of 6 fungicides to the morphology characters of Rhizoctonia cerealis.3 The control effect evalution of field about six fungicides on heat sharp eyespotWheat sharp eyespot,a major soil-borne disease caused by Rhizoctonia cerealis,was widely distributed in Huanghuai winter wheat area,northwest spring wheat area and the middle-lower regions of Yangzi river.At present,there is no resistant varieties available and the only way to control this disease effectively is chemical control with pesticide.The following eonelusions were Proved by field effieacy trials.Wheat sharp eyespot was treated with 25% ProPieonazole WG,25% tebueonazole WG and 10% difenoeonazole WG, their effects were all over36% after being treated in 14 days;.Wheat sharp eyespot was treated with 25% sanzuotong EC and 10% wuzuochun EC, their effects were all over30% after being treated in 14 days;.Wheat sharp eyespot was treated with 25% baijunqing WG, its effects was over25% after being treated in 14 days.4 Different Cultivars and Plant Density to Wheat Sharp EyespotWheat sharp eyespot,a major soil-borne disease caused by Rhizoctonia cerealis,was widely distributed in Huanghuai winter wheat area,northwest spring wheat area and the middle-lower regions of Yangzi river.At present,there is no resistant varieties available and the only way to control this disease effectively is chemical control with pesticide.The following eonelusions were Proved by field effieacy trials. Wheat sharp eyespot was treated with 25% ProPieonazole WG,25% tebueonazole WG and 10% difenoeonazole WG, their effects were all over36% after being treated in 14 days; Wheat sharp eyespot was treated with 25% sanzuotong EC and 10% wuzuochun EC, their effects were all over30% after being treated in 14 days;.Wheat sharp eyespot was treated with 25% baijunqing WG, its effects was over25% after being treated in 14 days.