杨树皱叶病的研究

杨树皱叶病是在黑龙江省杨树人工林中新发现的病害。该病害症状有两种类型，即皱缩型和卷团型。前者病源是类菌原体，后者是由昆虫所致。该病害对苗木生长有一定影响。７月末到８月上旬为发病盛期。防治措施是：（１）对插条苗进行脱毒处理；（２）抗病育种；（３）使用氧化乐果乳剂、久效磷、辛硫磷防治该病的媒介之一──瘿翅目幼虫。

STUDY ON CRINKLE DISEASE OF PRPLAR

Poplar crinkle disease is a new discovered in artificial poplar forest in Heilongjiang province.The symptom of the disease has two types.e.g.crenation type and crispate-round type.The former is caused by Mycoplasma like body. The latter is caused by insect.The disease can effect the growth of seedling.It is serious in end of Tuly to ten middle days of August.Control measurements are: (1)disinfecting cutting seedling;(2)disease-resistent breeding;(3)Using omethoate.monocrotophos and phoxim to control the larva of thrips.