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随着大棚蔬菜面积的增加,灰霉病发生态势加重,成为冬、春蔬菜的常发性重要病害。据调查,番茄、茄子、黄瓜、青椒、西葫芦、草莓、菜豆、莴苣等茄瓜类蔬菜都会发病,常造成烂叶、烂果,严重影响冬春季节的蔬菜生产。为了提高针对性的防病效果,现将蔬菜灰霉病发生特点及优化防治技术介绍如下。 1.发病症状:蔬菜植株地上各部位都会发生灰霉病,以花、嫩叶、幼果卷须最易发病,常引发这些受害部位的植物组织变色、软化、焦枯,甚至坏死。在环境湿度较高时,病部伴有灰褐色或灰绿色霉状物产生,并有发霉气味。叶片染病多始自叶尖,病斑呈灰褐色,成“V”形向内扩展,并有深浅相间的轮纹。茎基部染病开始呈水渍状小斑点,后扩展为椭圆形或长条形坏死斑,湿度大时长出灰褐色的霉层,严重的引起幼苗或病部以上枯
With the increase of vegetable area in greenhouse, the occurrence of Botrytis cinerea aggravates and becomes a common and important disease of vegetables in winter and spring. According to the survey, tomatoes, eggplants, cucumbers, green peppers, zucchini, strawberries, beans, lettuce and other eggplant vegetables will be the disease, often causing rotten leaves, rotten fruit, seriously affecting the winter and spring vegetable production. In order to improve the effectiveness of targeted disease prevention, the characteristics of vegetable gray mold disease and optimization of prevention and treatment technology are as follows. 1. Symptoms: Botrytis cinerea occurs on all parts of the plant, with flowers, young leaves, and young tendons most likely to cause disease, often causing discolouration, softening, scorching and even necrosis of plant tissues in these affected parts. In the high humidity, the disease is accompanied by gray-brown or gray-green mildew, and moldy smell. Leaf blade disease mostly from the tip, the lesion was gray brown, into a “V ” shape inward expansion, and the depth of the phase of the wheel pattern. Stem base of the disease began to stain small spots, and then extended to oval or elongated necrotic spots, when the humidity is long gray-brown mold layer, causing severe seedlings or disease more than dry