论文部分内容阅读
高梁炭疽病(Colletotrichum graminicolum(Ges·)wils)症状分叶疽和穗疽,以穗疽损失最重,常年为20～30％。其病情发展主要受品种、气象、施肥管理的制约,与6月份雨日数、平均日照时数关系尤为密切,该病在田间为正二项分布。病情指数与产量损失率的描述方程为y=14.8073e~(-73·4231)/X据此可求不同单产和防治效果下的防治指标。经决策分析,于孕穗期每公顷施用6％春雷霉素1.125公斤或50％多菌灵1.50公斤为宜。
Sorghum anthracnose (Colletotrichum graminicolum (Ges.) Wils) symptom points of gangrene and paniculosis, the heaviest loss of seeding, perennial 20 to 30%. The disease development is mainly controlled by varieties, meteorology and fertilization management, and is closely related to the number of rainy days in June and the average number of sunshine hours. The disease is in positive binomial distribution in the field. The equation of disease index and yield loss rate is y = 14.8073e ~ (-73.4231) / X, so we can find the control index under different yield and control effects. According to the decision-making analysis, it is advisable to apply 6% kasugamycin 1.125 kg or 50% carbendazim 1.50 kg per hectare at booting stage.