菊花是我国的传统名花。品种数以千计,花色、花型,千姿百态,鲜艳夺目,深受人们所喜爱。但是在栽培的过程中,常遇到各种病害,现简介几种防治方法。一、锈病(一) 症状该病主要危害菊花的叶和茎。开始时在叶片上产生淡黄色的小斑点,以后变褐,并凸起,这是病菌夏孢子堆,破裂后散出黄褐色粉末,即夏孢子。有时环 Chrysanthemum is our country’s traditional famous flower. Thousands of species, color, pattern, mix, colorful, loved by the people. However, in the process of cultivation, often encounter a variety of diseases, are introduced several methods of prevention and treatment. First, rust (a) Symptoms The disease endanger the leaves and stems of chrysanthemum. The beginning of a small yellowish spots on the leaves, later brown, and bulge, which is the disease bacteria summer spore reactor, rupture of brown powder, that is, summer spores. Sometimes ring