烟田黄板诱集及烟株烟蚜数量的定点定田块系统观察和调查结果表明 ,烟株上烟蚜数量的消长呈“三峰夹二谷”型 ,3个峰期分别出现在 6月中旬 ,6月下旬 ,7月中旬。烟株上烟蚜主要是无翅蚜 ,达 80 6 1% ,有翅蚜仅占总蚜量的 19 39%。黄板诱集的有翅蚜数量消长呈“四峰夹三谷”型 ,峰期为 5月下旬 ,6月初 ,6月下旬及 7月中旬 ,其中 6月初有翅蚜量最高达 6 0头 /黄板。同一烟田东、南、西、北、中设置的黄板诱集的烟蚜统计结果表明 ,东南面的有翅蚜数量明显高于其它方向的蚜量 ,中部蚜量最低 ,各方向黄板诱集烟蚜数量差异显著 (F =6 5 48 )。在烟草整个生长季节中 ,同一烟株东、南、西、北 4个方位上蚜虫数量依次降低 ,各方位蚜虫数量差异显著 (F =10 16 8 )。烟株上、中、下 3段烟蚜数量依次降低 ,差异显著 (F =9 2 47 )。烟株东、南、西、北 4个方位蚜虫呈聚集分布 ,且呈高密度高聚集 ,其中以东部叶片烟蚜的聚集度最高。烟株上、中、下 3段蚜虫亦成聚集分布 ,其中以上部蚜虫的聚集强度最高。利用黄板诱集来预测烟蚜数量动态变化 ,其结果并不能准确反映烟蚜在烟株上的实际变化情形 The results showed that the population growth of tobacco aphid was “three peaks folder two valley” type, and the three peak periods appeared in June Mid, late June, mid July. Tobacco aphids mainly non-winged aphids, up to 80 6 1%, winged aphids accounted for only 19 39% of the total amount of aphids. The number of winged aphids trapped in yellow plates showed a pattern of “four peaks and three valleys” with peak periods of late May, early June, late June and mid July, of which the highest aphid population reached 60 heads / Yellow board. The results showed that the number of winged aphids in the southeast was significantly higher than that in other directions, and the amount of aphids in the middle was the lowest. The yellow board There was significant difference in the number of trapped aphids (F = 6548). In the whole growth season of tobacco, the number of aphids in the four orientations of east, south, west and north of the same tobacco successively decreased, and the number of aphids in all directions was significantly different (F = 10 16 8). The number of tobacco aphids in the upper, middle and lower three stages decreased in turn, with a significant difference (F = 9 2 47). The aphids located in the east, south, west and north of the tobacco plant were aggregated and distributed in high density and high density, and the concentration of aphids in the east leaf was the highest. The upper, middle and lower aphids in the tobacco plants also aggregated and distributed, and the aphids collected in the upper part had the highest aggregation intensity. Using yellow-leaf trap to predict the dynamic change of the number of aphids, the results do not accurately reflect the actual changes of the tobacco aphid on tobacco plants