Studies On Occurrence And Control Technique Of The Major Pests On Gynostemma Pentaphylla In Ankang

Gynostemma pentaphyllum is also known as Qiyedan and Luodishenggen as a chinese traditional herbal medicine. It is a perennial herbal vine belonging to Gynostemma of Cucurbitaceae.The study object in the paple is Gynostemma pentaphyllum which is growing in Ankang. We researched Non-environmental-pollution control techniques of production on Gynostemma pentaphyllum baced on GAP and the standard technique system of Non-environmental-pollution production. We also investigated the arthropod communities in Ankang.The occurence dynamic of the pest had been ascertained too. Some pesticides without social effects were also screened. It can be expected to provide the theory and practice for the production of Gynostemma pentaphyllum based on GAP. The results showed as following:1. The arthropod communities on Gynostemma pentaphyllum in Ankang had been investgated. The results showed that the community was composed of 2 classes, 12 orders, 51families, 95 species, There were 17 species common pests. The major pests were Paridea angulicollis, white grubs, black cutworm and fleas, Ladybirds and spider were the major natural enemies.2. The occurrence regularity of the main pests on Gynostemma pentaphyllum has been investgated. Usually,Paridea angulicollis occurres two generations every year and the damage duration is in April to May and October to November. The dominant species of white grubs which damage to Gynostemma pentaphyllum include Holotrichia oblita Fald, Holotrichia morosa Waterh and Scarabaeoidae. The dominant species is Holotrichia oblita Fald. The pead period of the new larvae is the middle and last ten days of august and that time is the main damage duration too.3. The toxic efficacy test of several insecticides to Paridea had been tested interior and outdoor. The results showed that Abamectin, Beta-cypermethrin and Deltamethrin are more toxicity against Paridea and they could be used at emergency time.4. The dynamic degradation in the soil and the residue test on Gynostemma pentaphyllum of Phoxim and Cyhalothrin which were selected in the field efficacy trials had been tested. The result showed that the amount of the remnant is lower than the remnant national standard of maximal limit (MRL).5. The handbook which include the calendar of control the main pests, the limited pesticides and using techniques and the prohibition using pesticides and safely using pestcides on Ggnostemma pentaphyllum based on GAP had been compiled. It provided the scientific basis and the concrete measures for the production of Ggnostemma pentaphyllum.