摘要
为探讨烟草黑胫病（Phytophthora parsitica）发生规律及防治技术,于2002-2005年在贵州省余庆县对烟草黑胫病发生规律进行观测,结果表明：烟草黑胫病始见期在6月下旬,病害发生高峰期在7月中旬,7月下旬地上部开始死亡,8月上旬地上部进入死亡高峰;连作比轮作发病重,连作时间越长发病越重,轮作发病最轻;地下害虫发生危害影响烟草黑胫病发生程度。防治应采取农业防治为基础,抓好治虫防病,在关键时期及时进行化学防治的防治策略。
The occurrence regulation of Phytophthora parsitica was observed to investigate its occurrence regulation and control technique in Yuqing during 2002-2005. The results showed that the Phytophthora parsitica began in the last ten-day period of June and the peak occurrence time was in the middle ten-day period of July, and the aerial part of tobacco plant began death in the last ten-day period of July and the death peak in the first ten-day period of August. The Phytophthora parsltica of continuous cropping was more serious than rotation cropping and the disease index increased with increase of continuous cropping time. The soil insects had the effect on the occurrence degree of Phytophthora parsitica. The control measures should include applying chemical agents in the key control period on the basic of agricultural comprehensive control.
出处
《贵州农业科学》
CAS
2007年第4期90-91,93,共3页
Guizhou Agricultural Sciences
关键词
烟草黑胫病
发生规律
防治技术
余庆
贵州
Phytophthora parsitica
occurrence regulation
control technique
Yuqing
Guizhou
