影响木霉菌在叶表定殖的因素

The Effect of Colonizing Factors for Trichoderma on Tomato Leaf Surface

试验着重研究了影响木霉菌在番茄叶表的定殖因子,即温度、湿度、光照与化学杀菌剂对木霉菌在番茄叶表定殖的关系。研究表明,温度和光照是环境因子中影响木霉菌定殖的主要因子。25￣30℃是木霉菌在番茄叶表定殖的最佳温度;连续光照有利于木霉菌在叶表的定殖,而不同湿度条件对木霉菌在番茄叶表的定殖影响不大。在几种化学杀菌剂对木霉菌在番茄叶表定殖影响的试验中,75%代森锰锌对木霉菌定殖的影响最小,可以通过调整其使用浓度,削弱叶表固有微生物区系对外源生防木霉菌的排斥作用,从而提高木霉菌的生防效果。

The trial is mainly about factors （such as temperature, illumination and so on） which affected colonizing of Trichoderma on leaf surface. The results showed that temperature and illumination were major factors which affected colonizing of Trichoderma on leaf surface. The maximum temperature rang was 25-30℃ for Trichoderma colonization on tomato leaf surface. Continuous illumination was benefit to colonization of Trichoderma on leaf surface, however no much affection of humidity was found on the Trichoderma colonization. There was little affection of chemical fungicide 75% mancozeb on colonizing ability of Trichoderma when the fungicide was sprayed on the leaf surface as compared with other fungicides. It was available to weaken the exclusion of orginal microflora to biocontrol agent, and then improve the biocontrol efficiency of Trichoderma sp against grey mold on leaf surface by adjusting the concentration of applied fungicide on the leaf surface.