福建省板栗疫病的发生及其防治

板栗疫病为我国检疫性病害。福建省1988年首次发现此病,并已在南平、三明、福州等地、市扩展蔓延,为害较重。防治首先应严格苗木检疫;选择抗病品种,嫁接时以抗病力强的大叶栗、茅栗等作为砧木;注重栗林抚育管理,多施磷钾肥增强寄主抗病力;清除并销毁发病较重的病株;刮除轻度感病植株的病斑皮层,并采用200倍“401”或“402”抗菌剂掺合0.1%平平加液涂抹等综合防治措施。

The Occurrence and Control of Castanea mollissima Blight in Fujian Province

Castanea mollissima blight is a quarantine disease in China.Thisdisease was first discovered in Fujian Province in 1988 and has been spread insome prefectures and cities such as Nanping, Sanming and Fuzhou and damagestrees seriously. The methods to control it are as follows: (1) seedlings should bestrictly quarantined.(2) varieties resistant to the disease should be select-ed. Bigleaf chestnut and Castanea seguinii which are strongly resistant to thedisease should be selected as rootstocks at the time of graft.(3) tending manage-ment for chestnut forests should be paid more attention to. P and K fertilizersshould be more applied in order to intensify the resisting power to the disease forhosts.(4) trees with relatively serious disease should be removed and de-stroyed. And (5) bark mantle with disease spot on slight-disease trees should bescraped off and these trees are also daubed by 200 time-"401" or"402" anti-seedling agent mixed with the solution containing 0.1% of peregal.