火疫病为苹果和梨树上的主要病害,是由细菌E.amylovora引起。风雨和昆虫可将细菌传播至花上,温暖潮湿的天气有利于细菌的繁殖。该病不是每年大发生,但一旦爆发,种植者必须花费巨大的人力财力去清除感染的 Fire blight is a major disease on apple and pear trees and is caused by the bacteria E.amylovora. Storms and insects can spread bacteria to the flowers, warm and humid weather conducive to the breeding of bacteria. The disease does not occur every year, but once it breaks out, growers have to spend enormous financial and human resources to clear the infected