Investigation on Occurrence Regularity and Control Technology of Pinus Huashanensis Blister Rust in Zhaoba Forest Farm at the Southern Foot of Qinling Mountains
In order to investigate the occurrence regularity and improve the control effect of Pinus huashanensis blister rust in Zhaoba forest farm in the southern foot of Qinling Mountains,the symptoms,pathogenic bacteria and pathogenesis of pinus huashanensis were investigated,and the difference of control effect of different fungicides triazolone,carbendazim and chlorothalonil were studied.The results showed that the leaf,branch and stem of Pinus huashanensis could be infected with blister rust,and the pathogen was infected by leaf,branch and stem successively.The pathogenic bacterium was cylindricum ribes,which had the characteristics of multihost and transmigration,and its life span lasted for 1～4 years.After spraying triazolone,carbendazim and chlorothalonil by canopy UAV,the incidence and disease index of the needles,branches and trunks of triazolone were the lowest,which were 8.33％,5.33％,2.33％ and 0.18,0.10 and 0.08,respectively.Compared with CK water,it was reduced by 74.23％,80.26％,77.44％ and 70.97％,71.43％ and 66.67％,respectively.The comprehensive control effect was the best,so it was recommended to give priority to using triazolone in the control of Pinus huashanensis blister rust.
blister rustoccurrence regularityprevention and control technologyPinus armandi
万方数据
维普
