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波尔多液杀菌剂有成本低、防治范围广、不易被雨水冲刷、残效期长及病菌不易产生抗药性等优点。但在使用中也发现一些问题:如用得过多影响光合作用和果实着色,在平原果园生石灰的来源少以及配制药液较麻烦等。因此,近几年在农药市场上出现“直接兑水喷雾的波尔多液”,但效果不理想,并时有药害(烧叶、烧果)发生。现浅淡波尔多液使用中的一些普遍问题和建议,供参考。 1.配制方法:波尔多液是由硫酸铜、生石灰和水,按一定比例混合而成的,但对混合的方法,许多人并不清楚,因而配出的药液不均匀,沉淀快,
Bordeaux liquid fungicides have the advantages of low cost, wide range of prevention and control, easy to be washed by rainwater, long residual period and bacteria resistant to antibiotics. However, some problems have also been found in use: if too much is used to affect photosynthesis and fruit coloring, the source of lime in the plain orchards is less and preparation of liquid chemicals is more troublesome and the like. Therefore, in recent years, “Bordeaux mixture directly sprayed with water” appears on the pesticide market, but the effect is not satisfactory and phytotoxicity (burning leaves and burning fruit) occurs from time to time. Bordeaux solution is pale on the use of some of the common problems and suggestions for reference. 1. Preparation: Bordeaux mixture of copper sulfate, quicklime and water, according to a certain percentage of mixed, but the mixing method, many people do not know, and thus the distribution of liquid non-uniform, rapid precipitation,