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成都市气候温和,蔬菜种类繁多,四季皆可种植,是我国最好的蔬菜基地之一。但因对其病、虫、草害的治理缺乏严密的科学性,以至影响蔬菜的产量和品质,加重了化学农药的残留量,直接威胁着人体健康。 1989年冬,根据菜农反映多种蔬菜的根部发生肿大;白菜苗移栽到大田后,因根肿,苗不生长,毁掉重种仍发病重,严重影响了蔬菜的产量和质量的情况。我们到桂溪乡现场挖取甘兰、白菜、芥菜、儿菜、油菜苔、芹菜观察并在实验室镜检,除芹菜为根结线虫外,其余的观察结果如下: 症状病株主根肿大,支根成小薯块状,组织脆硬。有的病根下部腐烂,有臭味。病株叶片中午萎蔫,傍晚恢复,基部叶片呈淡绿色。重病株萎蔫死亡。
Chengdu has a mild climate, a wide variety of vegetables and can be planted in all seasons. It is one of the best vegetable bases in China. However, the lack of rigorous scientific management of diseases, pests and weeds affects the yield and quality of vegetables, aggravates the residues of chemical pesticides and directly threatens human health. The winter of 1989, according to vegetable farmers reflect the occurrence of a variety of vegetables, the root swollen; cabbage seedlings transplanted to the field, due to edema, seedlings do not grow, heavy is still heavy and ruined, seriously affecting the yield and quality of vegetables . We went to Guixi Township site to dig for cabbage, cabbage, mustard, vegetables, rape moss, celery observation and laboratory microscopy, except celery root-knot nematode, the rest of the observations are as follows: , Zhizu into small tuberosity, tissue brittle. Some sick roots rotten, smell. Planting leaves wilting at noon, the evening recovery, the base leaves pale green. Severe strains wilted death.