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1988～1991年在湖南省12个主户烟草县(市)对烟草不同生育期的草害调查结果,烟地杂草达46科160余种.其中以禾本科、石竹科、蓼科、莎草科、菊科、天南星科、景天科、旋花科等杂草发生量大,危害严重.各烟地杂草群落组成和发生危害情况与烟草栽培制度和地域生态环境密切相关.烟-稻轮作烟地主要是一年生和二年生杂草危害,禾本科、石竹科、蓼科为主要恶性杂草;烟草-旱作轮作(或套作)烟地为一年生、二年生和多年生杂草混合危害.h陵区烟地以禾本科、石竹科、莎草科、蓼科杂草危害严重;山区烟地以禾本科、菊科、莎草科、天南星科、景天科、旋花科杂草危害严重.烟草各生育期均受杂草危害,但以大田生长期的伸根期、团棵期.旺长期受害(?)烈,杂草发生量急剧上升,是防除的关键时期.
From 1988 to 1991, 12 major tobacco counties (cities) in Hunan province were surveyed on the grass-roots damage to tobacco at different growth stages, and the weeds were found in 46 families with more than 160 species of weeds, of which, Gramineae, Caryophyllaceae, Polygonaceae, Grass, Asteraceae, Araceae, Sedum, Convolvulaceae and other weeds occur in large quantities and endanger the seriousness.The composition and occurrence of the weed communities in each tobacco field are closely related to the tobacco cultivation system and the regional ecological environment.The tobacco- Rice rotation is mainly annual perennial and biennial weed hazards, grass, Caryophyllaceae, Polygonaceae as the main weed; tobacco - rotation rotation (or intercropping) of tobacco for annual, biennial and perennial weeds mixed hazard. h Hill area of tobacco to Gramineae, Caryophyllaceae, Cyperaceae, Polygonum weeds serious harm; mountain tobacco to Gramineae, Compositae, Cyperaceae, Araceae, Sedum, Convolvulaceae weeds hazards Serious.Weed harms all the growth stages of tobacco, but the root growth in the field growth period, Tuanzhong period. Mongolian long-term victims (?) Strong, the incidence of weeds increased sharply, is the critical period of control.