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泡桐是我区栽植的主要速生用材树种,目前已定植二千余万株。近年来丛枝病发生普遍,危害日趋严重,尤其是1—4年生的幼树,发病率5—60%,感病严重的常濒于死亡。1979年对18株泡桐解析证明,此病对三年生以内幼树的材积生长量影响56%,但对十年生以上大树的生长量影响不大。几年来在河南省泡桐丛枝病协作组的帮助和指导下,地区与襄县、临颖、禹县等技术人员共同攻关,于1974年在禹县等从小面积药物单项防治试验开始,逐步扩大到综合性多点试验,1980年防治面积1.5万亩,1981年全区
Paulownia is my main planting of fast-growing timber species, has been planted more than twenty million. In recent years, the occurrence of the universal branch catarrhal disease, the increasingly serious harm, especially 1-4 year-old saplings, the incidence of 5-60%, often severely infected with death. In 1979, analysis of 18 paulownia trees showed that the disease had a 56% increase in the volume growth of young trees within three years, but had little effect on the growth of large trees over ten years old. Over the past few years with the help and guidance of the Henan Province Paulownia cupping disease collaborative group, the area and Xiang County, Lin Ying, Yu County and other technical personnel to tackle key issues, in 1974 in Yu County and other small area of ?? single drug prevention and control began to gradually expand To a comprehensive multi-point test, prevention and control area of 15,000 acres in 1980, the entire district in 1981