兰花病虫害的防治兰花本生于山林深谷，作为观赏植物栽培后，改变了原来的生长环境，病虫害就多了，要防止兰花病虫害的发生，最重要的手段进行土壤消毒；一是将营养土曝晒，通过紫外线照射，可杀死病菌、虫卵。二是化学药剂消毒。用浓度为１６％的福尔马林液泼浇营养土，... Orchids pest prevention and treatment of orchids Born in the mountains and deep valleys, as ornamental plants cultivated, changed the original growth environment, pests and diseases on more, to prevent the occurrence of orchids pests, the most important means of soil disinfection; First, the nutrition soil exposure , Through ultraviolet radiation, can kill bacteria, eggs. Second, chemical disinfection. Formaldehyde solution is poured into the nutrient soil with a concentration of 16% formalin, ...