Multiple cropping vegetable and rice can improve soil utilization rate reduce plant diseases and insect pests and prevent soil stalinization in protective field.
稻菜复种可以提高土地利用率、少蔬菜的病虫害、止保护地内土壤的盐渍化。
Studies on the insecticidal activity of extract of Ricinus communis L. against insect pests were carried out in vegetable crops.
用蓖麻提取物对蔬菜重要害虫进行了杀虫活性研究。
They are highly destructive insect pests that can cause extensive damage to fruit and vegetable crops, trees, shrubs and turf grasses.
它们是具高度破坏力的害虫，会对蔬果作物，树木，灌木以及草坪造成重大损害。
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