香榧主要病虫害发生情况调查

Investigation on Five Diseases and Pests Damaging to Torreya grandis ’Merrillii’ in Zhejiang

2019年4月-2020年6月,调查了浙江地区5个不同香榧Torreya grandis林主要病虫害发生情况。结果表明,香榧主要病害有香榧绿藻Chlorella sp.、香榧膏药病Septobasidium pedicellatum和香榧枝条黄化,主要虫害有香榧瘿螨Nalepella sp.和白蚁Odontotermes sp.。以诸暨东白湖香榧林的香榧绿藻和香榧膏药病发生最为严重,香榧绿藻在幼苗、幼树和古树上均有发生,可造成落果,香榧膏药病对香榧古树和幼树均有危害性;桐庐旧县香榧林枝条黄化的发病率最高(28.33%),但主要为轻症(感病指数为0.07);松阳玉岩镇的香榧瘿螨发生最为严重,为害率(33.33%)最高;遂昌三仁乡香榧林的白蚁为害率最高(24.00%)。调查结果为香榧病虫害的监测和防控提供了基础信息。

From April 2019 to June 2020,investigations were carried out on diseases and insects damaging Torreya grandis’Merrillii’at 5 different stands in Zhejiang province.The results showed that the main diseases were Chlorella sp.,Septobasidium pedicellatum and yellowing of branch.The main pests included Nalepella sp.,Odontotermes sp..In Zhuji Dongbaihu,Chlorella sp.and S.pedicellatum had the most serious occurrence,the former could cause damage to seedling,young and ancient trees resulted in fruit dropping,the later could cause damage to young and ancient trees.The highest incidence(28.33%)of yellowing was occurred in Tonglu county,with the index of infection of 0.07.Nalepella sp.was the most serious in Songyang,with the highest damaging rate of 33.33%.Odontotermes sp.in Suichang was the highest(24.00%).