EFFECTIVENESS OF SOME BOTANICAL PESTICIDES ON THECONTROL OF APHIDS (Aphis gossypii Glover) GLOVER ONCUCUMBER (Cucumis sativus L.) IN SON LA

Tóm tắt

The experiments on evaluating the control potential of botanical pesticides extracted from plant yam bean Pachyrhizus erosus L. Urban, leaves of Melia azedarach L. and Pterocarya tonkinensis F., and chilli fruits against Aphis gossypii Glover are conducted at the Real Farm of Son La College of Agriculture and Forestry. The results indicate that the botanical products extracted from the compound of plant yam bean Pachyrhizus erosus L. Urban with chilli fruits (TM1: 1kg dry yam bean + 1kg chilli fruits/10 L water), and Melia azedarach L., Pterocarya tonkinensis F. leaves, with chilli fruits (TM1: 0,5kg dry leaves of Melia azedarach L. + 0,5kg dry leaves of Pterocarya onkinensis F. + 1kg chilli fruits/10 L water) show the high control effect of about 88,32% % and 84,97% respectively (after 7 days sprayed). Extracts from only plant yam bean Pachyrhizus erosus L. Urban (TM1: 1kg dry yam bean/10 lít nước) reach 81,92% (after 7 days sprayed). The extracts from Pterocarya tonkinensis F. leaves (TM 1: 1kg dry leaves of Pterocarya tonkinensis F./10 L water) and from Melia azedarach L. leaves (TM 1: 1kg dry leaves of Melia azedarach L./10 L water) present a medium effect on the aphis at about 60%
(after 7 days sprayed). The botanical products extracted from two compounds: plant yam bean Pachyrhizus erosus L. Urban with chilli fruits and Melia azedarach L., Pterocarya tonkinensis F. leaves with chilli fruits prove useful in the control of the cucumber aphis Aphis gossypii Glover.