Studies on the Biological Characteristics of Echinochola crusgalli and its Control Methods Phenotypic Plasticity of Life History Characteristics: Quantitative Analysis of Delayed Reproduction of Green Foxtail (Setaria viridis) in the Songnen Plain of China Effects of Two Tested Herbicides on the Yield of Oat, Weed Control and Safety of Succeeding Crops Effects of crop pattern, tillage practice and water and fertilizer management on weeds and their control mechanisms Study on Weed Control of Four Perennial Grasses by Using 2,4-D Butylate in Mixture Sown Grassland at an Alpine Region Effect of defoliation on growth and fruiting of ragweed Study on the Population Ecology and Control of Ascendent Crab Grass in Summer Grain Crops in Hebei Province STUDIES ON WEED CONTROL IN TOBACCO FIELDS UNDER PLASTIC FILM MULCHING Study on the Technology for Eliminating Weeds in Forest by Chemical Herbicides Chemical Weed Control with Sulfometuron in Apple Orchard Technology of Using Chemical Herbicides to Eliminate Weeds in Fire-preventing Lines Progress in Studies on the Control of Invasive Weed Mikania micrantha H. B. K. Prospects for weed control through crop interference THRESHOLD PERIOD OF WEED CONTROL IN TRANSPLANTED RAPE IN JIANGSU PROVINCE The influence of weed control effects on light penetration rate, nutrition and water in rape fields Weed control effect and crop response to florasulam plus MCPA Weed control effect and safety to crops of a mixed formulation (halauxifen-methyl 10%+florasulam 10%) Research on application techniques for a novel herbicide 10% ZJ0273 EC on transplanted rapes Chemical Control of Weeds in Spring-seeded Alfalfa (Medicago sativa L.) Seedling Stage Critical period of weed control in no-tillage summer maize fields