The Termite And Lace Bug Control Of Camphor

To explore the methods of pest control and the affecting factors of prevention of the ancient and famous trees, the test used old camphor tree as the primary material, and investigate the control of pests at different times with the different methods and techniques. Test is divided into three parts, first, the experiment using the ancient camphor in Ningxiang County as test material, investigate and research the main pest which is termites and controlling technology in different methods. The second, an orthogonally designed experiment of three factors (depth, height, number), each at two levels, was adopted in order to research the effects of on pesticide conduction in Camphor with trunk injection. And gravity-type trunk injection was used in determining Imidacloprid efficacy on lace bug of camphor in different injection concentrations.The first test results showed that:the investigation on termite damage for 15 months from 2009 showed that:(1) In Ningxiang armed Forces yard, all the ancient camphor trees were damaged by termite in different degrees. The harmful levels which were+,++,+++, ++++ were 10%,70%,13.3%,6.7%, respectively. (2) There are two types of termite which were Odontotermes Macrotermes termites and Macrotermes barneyi Light, respectively whose damage symptoms were different. In this test, some comprehensive prevention and control method also conducted, the results showed that the order of efficacy:smeared and coated on the trunk then spraying in Ring ditch around the tree, Smeared and coated on the trunk only, smeared on the tree then spraying in Ring ditch around the tree, and smeared on the tree only.The second test results showed that 1.1) the effects of the three factors on the Imidacloprid absorption rate and Imidacloprid concentration at different positions was different. The order of importance of the three factors on Imidacloprid concentrate on the south side of the upper crown was:depth (B), height (A), number(C). On the south side of the lower crown, the order was depth, number, and height. On the north side of the upper crown, the order was number, depth, height. On the north side of the lower crown, the order was height, number and depth.2) A best possible program for different position indicators in an integrated balance method was found that was height (150 cm) depth (4 cm) and number (2).2.different concentrations of Imidacloprid were injected in the camphor trunk for controlling lace bug, whose results showed that the 3 kinds of concentrations of pesticides on camphor bug controlling have certain spinal action. Decrease rate of insect and insect control effect in different concentrations increased after 1-5 days until after the 19 days,which decrease decreased slightly. Controlling effect is related to the concentration and length of time after the drug. In the 0.006g/ml agents, controlling effect was best.