Initial report about studies on ULV spray application of lignite extract for the control of Aphis gossypii Glover.

Experiments were carried out for controlling Aphis gossypii Glover of cucumber with lignite extract in greenhouse.The results show that lignite extract with dosage of 10.5-21.0 L·hm-2 which sprayed with high power electrostatic spray system every 6-8 days can significantly reduce the quantity of Aphis gossypii Glover.Lignite extract with dosage of 21.0 L·hm-2 can make the quantity of Aphis gossypii Glover maintain extremely low lever in cucumber growth period.