| Forestry construction is an important part of the ecological construction and economic construction in our country.The forest resources of our country are so rich.The total amounts of the forest resources are in the leading of the world,but the per capita is relatively few.The forest resources get the attention of more and more people,because they can bring abundant ecological benefits and economic benefits.As well,a lot of problems have happened at the moment of the rapid development of forestry and the most serious is the great threat of the disease and pests of forest resources.Therefore,the investigation of our article introduced the necessity,occurrence,reason ofprevention of the disease and pests of forest resources.According to the problems existed,we put forward some scientific,efficient and reasonable prevention method and feasible opinions.In this article,the method we chose was combined with field investigation and data collection.The investigation of the common tree species and disease and pests of the forest resources was processed.Not only that,five main types of the forest trees in Nature reserve of Luya moutain was chose to research their major occurrence characteristic and prevention method of disease and pests,for example Pinaceae,Cupressaceae,Sophora,Populus and Salix.On the basis of above investigation,the specific problems of the prevention process were found out and how we could used to carry out the prevention work was discussed.According to the result of the investigation,the list of the forest resources of forest district of Luya moutain was made and there were 26 families,90 species trees.Among them,there had great difference in the number of the different species.Pinaceae,Cupressaceae,Sophora,Populus and Salix was the five main species forest trees and the proportion of the total trees was respectively 17.8%,5.6%,5.6%,6.7%and 3.3%.The species of the disease of forest resources in forest district of Luya moutain was 17.The big difference expressed in incidence parts,incidence seasons,disease types,pathogenic types,transmission ways and incidence characteristics.Among them,the most incidence part was the leave and the total of it was 8.The most incidence season was the whole year and the total of it was 11.The major disease types were infectious disease and the total of it was 16.The major disease types were fungal infection and bacterial invasion and the total of it was 15.And the major transmission ways were natural communication and the total of it was 10.The pests of forest resources in forest district of Luya moutain were 11 families,26 species.We also chose 3 sides to introduce the basic differences of the pests of forest resources,like the damage parts,damage tree species and incidence characteristics.As well,the most damage parts were leaves and stems and the total of it was respectively 17 and 11.At the same time,the damage tree species were so different.The most species was poplar and willow and the total of it was 13.The six major diseases of the five major forest trees of Luya moutain were respectively brown spot,canker disease,decay,powdery mildew,blister rust and pear rust.Among them,the most serious hazard degree was decay and canker disease.The chemical control was the major control method.The control effect of canker disease was the best.And blister rust had good control effect on the early time of the prevention.Pear rust had good control effect on the late time.The seven major pests of the five major forest trees of Luya moutain were respectively Anoplophora glaoripennis,Aegeriidae,Semiothisa cmerearia,Aphidoidea,Dendrolimuskikuchii,Semanotus sinoauster and Agrotis ypsilon.Among them,the most serious hazard degree was Semanotus sinoauster and Aphidoidea.The control method was chose by the different characteristics and the situation of the pests.The control effect of Anoplophora glaoripennis was the best.And Aegeriidae had good control effect on the early time of the prevention.Semanotus sinoauster had good control effect on the late time.In addition,Aegeriidae and Semanotus sinoauster always chose two ways to control,such as the chemical ways and physical ways.And the two ways commonly used to Semiothisa cmerearia and Dendrolimuskikuchii were physical control and biological control. |
