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通过田间小区人工接种试验,分析比较了花生褐斑病和网斑病单独及混合发生的流行过程及对花生产量损失的影响。结果表明,在病害混发初期,病害间无明显的相关性,随着病情加重,病害间的负相关性逐渐增大并达到显著水平,说明病害间有明显的抑制作用。在不同生育期接种发病情况有所差异,在开花初期和盛花期接种,褐斑病和网斑病的病情较重,而在开花末期接种的病情较轻,但都能表现病害间的抑制作用。病害混发时造成的产量损失小于各病害单独造成损失之和,对白沙1016和四粒红接种2种病菌,病害混合发生所造成产量损失约为各病害单独引起损失之和的77.2%~85.7%和76.1%~79.6%。在不同生育期接种2种病菌,2个品种产量的损失均随着侵染时期的推迟而逐渐降低。
Through artificial inoculation experiments in field plots, the epidemic process of peanut leaf spot and net blotch separately and mixedly and the effect on peanut yield loss were analyzed and compared. The results showed that there was no obvious correlation between the diseases during the early phase of disease mixing. With the aggravation of the disease, the negative correlation between the diseases gradually increased and reached a significant level, indicating that the disease was significantly inhibited. Inoculation in different stages of growth are different, in the early flowering and flowering inoculation, brown spot and net blotch disease is more serious, but in late flowering inoculation of the disease is lighter, but can show the inhibition between diseases . The yield loss caused by disease mixing is less than the sum of the losses caused by each disease separately. The two kinds of bacteria inoculated with Baisha 1016 and Sifhong Red were mixed. The yield loss caused by disease mixing was about 77.2% ~ 85.7 % And 76.1% ~ 79.6%. Inoculation of two kinds of germs at different growth stages, the yield loss of two cultivars decreased gradually with the postponement of the infection period.