论文部分内容阅读
早春大棚蔬菜生产中,要按照无公害农产品生产标准,综合运用农业、生态、物理及化学等防治手段,控制好病虫害的危害,提高种植效益。春季北方地区出现雨雪天气,会导致设施大棚内气温持续偏低,空气湿度偏大,这是病害发生和蔓延的主要原因。寒害是番茄在生长过程中遇到持续低温而造成的一种生理性病害。当棚温持续8~10℃,植株会表现轻微寒害,具体表现在叶色暗绿,无光泽,花芽不正常分化。棚温持续6℃以
In early spring greenhouse vegetable production, according to the pollution-free agricultural production standards, comprehensive use of agriculture, ecology, physics and chemistry and other prevention and control measures to control the hazards of pests and diseases, improve planting efficiency. The rainy and snowy weather in the northern part of the spring will lead to the continuous low temperature in the greenhouse and the high humidity of the air, which is the main reason for the occurrence and spread of diseases. Chilling injury is a physiological disease caused by the persistent low temperature encountered in the growth of tomato. When the shed temperature continued 8 ~ 10 ℃, the plant will show a slight chill injury, specifically in the dark green leaf color, dull, flower buds are not normal differentiation. Shed temperature for 6 ℃