藏蓟的生物学特性、危害损失与防治

Biological nature, damages and control of Cirsium lanatum

在青海海南州共和县对藏蓟生物学特性和危害损失进行调查研究明确,藏蓟株高100-150 cm,多分枝,每株藏蓟开花9-30朵,平均每朵结种籽79粒。种子于室内存放225 d,仅7％-15.0％发芽。气温达0-12℃时藏蓟根茎萌发出苗,高峰期为5月上旬,全生育期约142 d。1 m2内有藏蓟8-10株时,青稞产量损失达30.3％-32.8％。

The grown Cirsium lanatum is 100 - 150cm high, multi-bifurcated. 9 - 30 flowers blossomed out per plant. The average seeds for each flower were 79. Stored for 225 days indoors .about 7% - 15% seeds germinated. When air temperature went up to 0 - 12℃ , the rhizome developed into seedlings, and the peak time was early May. The flowering and fruiting phase was June-August. The whole development period was about 142 days. The barley yields were reduced by 30.3% -32.8% respectively, when the density of C. lanatum was 8 - 10 plants within 1 m2.