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为探究豚草与苍耳上的广聚萤叶甲种群是否存在分化,对来自这两种植物上的叶甲(分别称为“豚草叶甲”和“苍耳叶甲”)进行了选择性试验,并测定了其对5种近缘植物的取食量。选择性试验结果表明,两群来源不同的叶甲对豚草和苍耳的选择偏好存在显著差异,表现为豚草叶甲更偏好豚草,而苍耳叶甲相对更偏好苍耳。对广聚萤叶甲成虫取食量的测定结果表明,对不同测试植物的取食量随来源寄主植物不同而存在显著差异,两群叶甲对向日葵的取食量存在显著差异,但对其他植物的取食量均无显著差异。豚草叶甲对豚草的取食量显著大于对其他测试植物的取食,24 h平均取食量达51.27 mm2,而对其他4种植物的取食量无显著差异,均低于40 mm2;苍耳叶甲取食豚草的量为52.24 mm2(24 h),与取食向日葵和三裂叶豚草量无显著差异,但显著大于取食苍耳和菊芋的量,取食后两种植物的量没有显著差异。研究结果说明,苍耳属植物可能是广聚萤叶甲除豚草外的另一潜在寄主植物。
In order to explore the existence of differentiation of Agrocybe aegagrus populations on ragweed and xanthium, the effects of aphids from the leaf beetles (“ragweed leaf beetle” and “cocklebur leaf beetle”, respectively) ) Were tested for selectivity and their food intake to five species of relatives was determined. The results of the selective test showed that there was a significant difference in preference preference between rachis and Xanthium for two groups of different origins. The results showed that there was a significant difference in the feeding amount of different tested plants with the host plants, but there was significant difference in the feeding amount of two leaf traps to sunflower, There was no significant difference in the food intake of plants. The feeding amount of ragweed leaf to ragweed was significantly greater than that of other tested plants, the average feeding amount reached 51.27 mm2 in 24 h, while the feeding amount to other four plants was no significant difference, all less than 40 mm2 ; Cladosporium fulvus fed with ragweed was 52.24 mm2 (24 h), which was not significantly different from those fed on sunflower and Crassulaceae, but significantly higher than those fed on cocklebur and Jerusalem artichoke, There was no significant difference in the amount of plants. The results showed that the genus Xanthium may be another potential host plant outside Polygala tenuifolia.