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通过人工接种筛选抗病品种资源,研究播期、种植密度对病害发生的影响,明确玉米镰孢菌穗腐病发生与品种资源、播期、种植密度的关系,分析棘孢木霉菌颗粒剂(TCF)和XDS种衣剂(40%毒死蜱乳油、20%辛硫磷和10%井岗霉素混剂)对玉米穗腐病的防效。结果表明,32个自交系中有6个抗病自交系,延迟播种玉米镰孢菌穗腐病发生严重,播种密度对病害发生程度无显著影响。人工接种条件下,TCF颗粒剂穴施、XDS种衣剂拌种2个处理表现为百粒重增加、秃尖长度降低,TCF颗粒剂穴施处理的防效最高,为48.69%。
The resistant varieties were screened by artificial inoculation to study the effects of sowing date and planting density on the occurrence of diseases. The relationship between occurrence of Fusarium ear rot of corn and the resources, sowing dates and planting density was studied. TCF) and XDS Seed Coatings (40% Chlorpyrifos EC, 20% Phoxim and 10% Jingangmycin) against corn ear rot. The results showed that there were 6 disease-resistant inbred lines among 32 inbred lines, and the densities of Fusarium graminearum with delayed seeding were serious. The sowing density had no significant effect on the disease occurrence. Under artificial inoculation conditions, the treatment of TCF granules and XDS seed dressing showed the increase of 100-grain weight and the decrease of baldness length. The control effect of TCF granules was the highest, 48.69%.