| Wheat take all disease?Wheat take-all??Sharp eyespot of wheat?sheath blight,root rot?Wheat common root rot?is an important production of wheat planting in China on soil borne disease.In this st udy,with eight fungicides of wheat seedling safety and indoor toxicity test for the determination of three kinds of soil borne pathogens.The indoor toxicity test results showed that:in the eight kinds of chemicals were detected,Rhizoctonia cerealis is sensitive to fludioxonil,thifluzamide and tebuconazole,which inhibit the concentration of thifluzamide on the growth of the mycelial minimum toxicity regression equation was Y=6.2053+0.6989X,EC50 value:0.0189?g·mL-1;Gaeumannomyces graminis of Tebuconazole,prochloraz and prothioconazole is more sensitive to the toxicity regression equations were Y=6.1243+0.8027X,Y=5.5249+1.1727X,Y=5.5249+1.1727X,EC50 value:0.1495G-mL-1,0.1511?g·mL-1,0.6088?g·mL-1.wheat root rot of prothioconazole,is also more sensitive to tebuconazole and fludioxonil,the regression equation of fludioxonil was Y=5.97+0.4859X,EC50value:0.0101?g·mL-1,tebuconazole toxicity regression equation for Y=5.7855+0.904X,5.2268for EC50?g·mL-1,linearregressionequation prothioconazole was Y=6.3658+1.7201X,EC50 was0.1607?g·mL-1.and prochloraz and Difenoconazole had ob vious inhibitory effect on th e mycelial growth of root rot of wheat seedlings were measured.The results show that the safety of seed treatments on.The early seedling was affected by temperature difference fungicides combination storage also affect growth of wheat seeds,the relatively large impact of chlorine nalidixic bacterium fat.Determination of comprehensive emergence of safety test and indoor toxicity results,select the main four kinds of soil borne diseases(control of Wheat Sheath Blight?main?,take all disease,A highly effective and safe a gent for root r ot disease:cefotaxime,pyrazole ether ester,miconazole,and propylene.In the screening test of additives,determine the mixture of BY140 and NNO#as wetting dispersing agent,formula 6 as dispersing agent and thickening agent,wetting agent.The optimum formula of abscission rate by detecting the film forming time,the results after dumping identified WLNO as seed coating film-forming agent.The compound drug safety test in indoor and indoor to take all disease prevention trial,comprehensive survey results:compared with the low temperature?4 DEG8 DEG?and high temperature?25 DEG28 DEG?,temperature?15 DEG20 DEG?under the condition of seed germination and growth of wheat storage better inhibition on wheat the maximum growth temperature conditions.In the middle of the pharmacy?three months before sowing seed germination and growth of wheat?to promote the relatively obvious effect,different agents generally have the advantage in the seedling length,root length and seedling emergence rate,and with the fungicides combination storage time is longer,the greater the inhibition effect on Seed growth.To take all of wheat in the room Control effect test:the best control effect is 6%AB,the average control effect was 62.06%,followed by 6%AD,the average control effect of 59.27%.6%AC and 6%AD had little difference,the field test results of the average control effect of 56.22%.compound drugs showed that seeds ratio is too large,not only to promote the growth of wheat germination,but also n egative influence on the grow th of wheat at j ointing stage.Results showed that 6%AD and 6%BD can promote the increase of wheat tiller number,6%AD and 6%AC promote wheat growth effect is more significant.The field of wheat sharp eyespot prevention trial survey showed that:6 The control effect of%AD is best,the control effect was 60.86%;in 6%BD,the relative control effect was 54.29%;while 6%AB and 6%BD almost no difference,the control effect was53.44%;the relative control effect of 6%BC and 6%AC were selected for five kinds of dru g combination for 50.36%and 48.82%.and after comprehensive comparison to 6%AC and the 6%AD formula is better. |
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