The amount of honeydew of aphid was positively correlative with the pressure of vascular bundle of wheat, and the content of soluable sugars in honeydew was positively correlative with that in food.

• 蚜虫的排蜜露量与小麦维管束膨压呈正相关，蜜露中含糖量则与食料中含糖量呈显著正相关。