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一、轮作的概念及病虫害防治原理轮作是指同一块地上有计划地按顺序轮种不同类型的作物和不同类型的复种形式称为轮作。同一块地上长期连年种植一种作物或一种复种形式称为连作,又叫重茬;两年连作称为迎茬。连作常引起减产。容易导致“土壤病”现象,这是因为:1.每种作物都有一些专门为害的病虫杂草。连作可使这些病虫草周而复始地恶性循环式地感染为害,如黄瓜的霜霉病、根腐病、跗线螨;番茄病毒病、晚疫病;辣椒的青枯病、立枯
First, the concept of rotation and pest control principles Crop rotation is the same piece of land on the ground in the order of rotation of different types of crops and different types of multiple crop rotation is called. The same piece of long-term perennial planted a crop or a compound crop form known as cropping, also known as cropping; two consecutive known as the stubble. Even often caused by production cuts. Easily lead to “soil disease” phenomenon, which is because: 1. Each crop has some pests and weeds specially detrimental. Continuous cropping can lead to the vicious cycle of infection of these diseases and insect repellents, such as cucumber downy mildew, root rot, Trichogramma; tomato virus disease, late blight; peppers bacterial wilt,