Medicago sative L 紫花苜蓿
Lactuca sative 叶用莴苣
Lactuca sative L 叶用莴苣
seedling of oryza sative 水稻幼苗
The increasing rate of width and length of primary leaves decreased obviously after 10 days planting. The leaves got their maximum areas after 15 days while L. sative was just at the 3nd instar stage.
经10天左右的培养，叶片长、宽度增长速率明显减慢，此时是接种斑潜蝇的最佳时机，15天后即斑潜蝇幼虫生长到3龄时，叶面积达最大。
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