青椒的落花、落果及落叶通称“三落”,我国的东北、华北到南方都有发生,且逐年加重,对青椒产量影响很大。一般落花率可达20％,落果率5—10％左右。亩减产60％以上,三落原因及防治措施主要有以下几方面: 一、生理性“三落” (一)早春低温,影响授粉及花粉管的伸长,中柱花及短柱花增多,授粉受精不良而引起大量落花。可采用地膜覆盖、小拱棚等保护设施,提高地温及气温,防止低温侵袭。一般白天温度不超过30℃,夜间 Green peppers falling, falling fruit and leaves commonly known as “three falling”, China’s northeast, north China to the south have occurred, and increased year by year, a great impact on the yield of green peppers. General rag rate of up to 20%, drop rate of about 5-10%. Mu yield reduction of more than 60%, three reasons and prevention and control measures are the following aspects: First, the physiological “three falls” (A) low temperature in early spring, affecting pollination and pollen tube elongation, Poor fertilization pollination caused a large number of falling flowers. Can be covered with plastic film, small shed and other protection facilities to improve ground temperature and temperature, to prevent low temperature invasion. The general daytime temperature does not exceed 30 ℃, night