菊花病虫来源主要是花土、旧花盆、扦插条、种子和幼苗。所以在种植前应采用新鲜花土,进行曝晒,或用1:80福尔马林液消毒土壤和花盆,或在土中混进一定量(中盆15克以下)代森锌粉。扦插、移栽前,用800—1000倍多菌灵喷一次。下面主要介绍定苗后病虫害的防治方法。 (一)病害主要有以下几种: 1.斑点病主要从土壤传 The main sources of chrysanthemum pests are flower soil, old flower pots, cuttings, seeds and seedlings. Therefore, before planting should be used fresh flowers and soil, exposure, or disinfect the soil and flower pots with 1:80 formalin, or mixed into the soil in a certain amount (15 grams in the basin) desenzine powder. Cutting, before transplanting, with 800-1000 times more time to spray. The following describes the prevention and treatment of pests and diseases after Dingmiao. (A) The main diseases are the following: 1. Spots disease spread from the soil