摘要
通过人工控制串珠藁本密度，研究了其在不同密度下对小麦造成的产量损失。当串珠藁本密度由０增至６０万株／６６６．７ｍ２时，小麦产量损失由０增至３７．７％。根据经济损失水平计算，串珠藁本的防除指标为４．３万株／６６６．７ｍ２。
Yield loss with different densities of Ligusticum moniliforme was studied by artificial control of density in Ligusticum moniliforme. When the density of Ligusticum moniliforme was increased from 0 to 600 thousand plants per 666.7 m 2, the wheat yield was decreased from 0 to 37.7 percent. According to the economical loss standard, the control threshold of Ligusticum moniliforme was 43 thousand plants per 666.7 m 2. The optimum control period was 3￣4 leaf stage in spring wheat.
出处
《西北农业学报》
CSCD
1996年第2期79-81,共3页
Acta Agriculturae Boreali-occidentalis Sinica
关键词
串珠藁本
防除指标
小麦
产量
Ligusticum moniliforme
Economic threshold
Control threshold
