摘要
笼罩接虫试验表明，水稻初期受赤斑黑沫蝉危害后造成产量损失的主要原因是水稻受害叶面积和秕谷率增加，并得出了早稻穗期产量损失（ｙ）与每丛禾赤斑黑沫蝉数量（ｘ）的回归方程。根据目前稻谷价格、防治费用等，导出赤斑黑沫蝉防治指标为每丛禾０．２３头，经大田验证，与实际基本相符．
The cage experiment indicated that on the heading period
of early ric,the rela-tionship between the yield loss(y)and the number of rice
spittlebug,Callitettix versicolorper hill(X)coincided with a specially regression eguation The
main reason of yield loss wasthe increase of the injured leaves area and the rate of unfilled of
grain in infected rice.Accord-ing to the present price of grain and the control cost etc,the
economic threshold of C.versicolor was about 0.23 adults per hill which was verified to accord
with the practice basi-cally in the field.
出处
《湖南农业大学学报（自然科学版）》
CAS
CSCD
1995年第5期427-431,共5页
Journal of Hunan Agricultural University(Natural Sciences)
基金
湖南省衡阳市科委资助
关键词
水稻
赤斑黑沫蝉
防治指标
害虫
paddy
insecta
yield/Callitettix
versicolor
economic threshold
