| 南充油菜菌核病发生流行成因分析及综合防控措施研究 |
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| 作者姓名： | 杜晓宇 黄庆 黄云 何相才 王正跃 刘建国 张昭 李吉兴 |
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| 作者单位： | 杜晓宇(南充市农业技术推广站,四川南充,637000);黄庆,黄云(四川农业大学植物病理学系,四川雅安,625014);何相才(南充市气象局,四川南充,637000);王正跃(高坪区植保站,四川南充,637100);刘建国(营山县植保站,四川营山,637700);张昭(南充市农业局科教科,四川南充,637000);李吉兴(高坪区农技站,四川南充,637100)? |
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| 基金项目： | 农业部公益性行业(农业)科研专项"油菜菌核病早期诊断技术与成灾规律研究"? |
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| 摘 要： | 对1998——2008年油菜菌核病田间系统调查和病情普查分析表明,南充市油菜菌核病具有单年流行的菌源量基数和长达18～25天的病菌孢子最适侵染期,而适宜的气象条件则是菌核病重发的决定性因素.根据11年来2-4月的气象因子,结合最终茎秆发病面积比、最终茎病株率和最终病情指数建立了3个数学模型,并取得较好回检效果.利用稻草覆盖、适当调整播栽期等轻简化栽培控病措施,对油菜菌核病的综合防治效果可达50%以上;用2次50%多菌灵100 g/667m<''2>防效可达85%以上,菌核病在南充尚未对多菌灵产生明显的抗药性.
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| 关 键 词： | 油菜菌核病 重发成因 综合防控 |
Analysis on Field Occurrence Reason and Integrated Control For Rape Sclerotinia stem rot in Nanchong |
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| Authors: | DU Xiao-Yu |
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| Abstract: | Based on the systematic survey and disease investigation of Rape Sclerotinia stem rot from 1998 to 2008 in Nanchong, the single-year prevalence could be caused by the cardinal number of sclerotia from Sclerotinia sclerotiorum , and the optimum infection period of ascospore was 18~25days. The suitable weather conditions were the decisive factors of the serious disease. According to the meteorological factors in the past eleven years from February to April , three mathematical models had been established and achieved good test results. The mathematical models respectively related to the area ratio of ultimate incidence in stem, the diseased plant rate of stem disease and the final disease index. Utilizing lightened and simplified disease-control cultivation measures such as straw mulching, appropriate adjustment of sowing and transplanting period, the effect of integrated control on Rape Sclerotinia stem rot could reach more than 50%. The drug-resistance of Sclerotinia sclerotiorum to carbendazim wasn’t obvious yet on local. When applied with 50% carbendazim at 100g/667m2 twice in field, the control effect was over 85%. |
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| Keywords: | Rape Sclerotinia stem rotzz cause of a serious diseasezz Integrated Controlzz |
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