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为给葡萄避雨栽培中白粉病的防治提供参考,于2008和2009年监测了避雨和露天栽培处理中葡萄白粉病的发生流行与植株冠层气象因子的变化情况,研究了避雨棚内外气象因子变化对白粉病的影响。田间监测结果表明,常规露天栽培处理中雨季来临之前有白粉病发生,但集中降雨后白粉病的病情指数显著降低,而避雨栽培处理均加重白粉病的发生。避雨和常规露天栽培植株冠层气象因子差异分析结果表明,避雨栽培正好创造了适宜白粉病发生的高湿(60%~90%)但叶面干燥的环境,避雨栽培还减弱了葡萄植株冠层的光照强度(6.4%),消弱了光照对白粉病菌的抑制效果,有利于白粉病的侵染和流行。但通过合理施用杀菌剂能有效地控制白粉病的发生和危害。
In order to provide a reference for the prevention and control of powdery mildew in rain shelter cultivation in grapevine, the prevalence of grape powdery mildew in rain sheltering and open-air cultivation was monitored in 2008 and 2009, and the changes of canopy meteorological factors were studied. Influence of Variation of Meteorological Factors on Powdery Mildew. The results of field monitoring showed that powdery mildew occurred before the onset of the rainy season in conventional open-field cultivation, but the disease index of powdery mildew was significantly decreased after intensive rainfall, while the occurrence of powdery mildew was all aggravated by rain-shelter cultivation. The results of canopy meteorological factors analysis between shelter-type and conventional open-air cultivation showed that rain shelter culture just created a high-humidity (60% -90%) but leaf-dry environment suitable for powdery mildew, The canopy light intensity (6.4%) weakens the inhibitory effect of light on powdery mildew, and is beneficial to the infection and epidemic of powdery mildew. However, through the rational application of fungicides can effectively control the occurrence and harm of powdery mildew.