| Panax notoginseng, planted in Baise, has evolved into large scale and industrialization. Because of the less investigation and research for the panax notoginseng pests.the research for what their occurrence regularity and preventive methods are, has become the significant assignment of Panax notoginseng.From 2014 to 2015, the author has a comparative analysis in Baise local Panax notoginseng producing areas, and carried on a primary research for control methods of the main Panax notoginseng pests. The results are as follow:1. There are 3 classes,8 orders,25 family and 40 different species of the verm on the Panax notoginseng.The main insect pests are Formicococcus Takahashi, Bemisia tabaci,Liriomyza sativae,Agriolimax agrestis, Tetranychus cinnabarinus; The main natural enemies are Mantodea and spiders etc.some of them more seriously harmful are Formicococcus Takahashi and Agriolimax agrestis, so do Tetranychus cinnabarinus and Bemisia tabaci in some region.2. Formicococcus Takahashi will make the plant yellow and wilted by piercing and sucking the juice of the root, the result will cause the quality of the root worse. Formicococcus Takahashi will severely damage the the Panax notoginseng during July and August, especially when the plant are gradually ripe and nutritionally adequate, then Formicococcus Takahashi has enough food to propagate, the mass propagation will cause exploding trend.There will have reached to 30 pests per plant.Bemisia tabaci will make the leaf yellow and wilted by piercing and sucking the juice of the Panax notoginseng leaves.It is in April and July per year that Bemisia tabaci will make the seriously damage to the Panax notoginseng,particularly in some village of Jingxi.Agriolimax agrestis most damaging thePanax notoginseng seriously in two fastigiums which are between January and March and between July and September. Tetranychus cinnabarinus is mischievous the Panax notoginseng by piercing and sucking the young leave and stems of the plant.The periods of Tetranychus cinnabarinus does harm to the Panax notoginseng are between Jane and August and between October and November. Liriomyza sativae are mainly damaging the Panax notoginseng in lower altitude. It larvae has latent on panax notoginseng’s leaves to eat mesophyll and left tunnel.Serious will caused the leaf dieback.3.According to the investigation which the Panax notoginseng cultivated in different altitude in Baise, We collected 5 kinds of pests in 5 family in high altitude. There are 14 kinds of pests in 14 family in intermediate altitude. while in lower altitude we collected 18 kinds of pests in 18 family. In the higher altitude, it’s dry and the temperature is lower, there is fewer pests occurrence, the dominant vermin species are longhorned grasshoppers, Tetranychidae, Locust etc. Whereas in the low altitude, the weather is hot and humid, the pests occurrence is more serious, and we found a multiplicity of the pests, the main species are Formicococcus Takahashi, Bemisia tabaci, Geometridae, Agriolimax agrestis, Locust, Tetranychus cinnabarinus etc.4. To control Formicococcus Takahashi in its damage period, the most efficient way is using the adequate dosage of 373.13g 0.05% clothianidin per ha to its root. Secondarily, 22.4% spirotetramat (spirotetramat:water=1:3000),which the dosage is 133.39g per ha, or 149.25g 25% the Buprofezin per ha with root-irrigation method. After 30 days, the efficacy of these three kind of pesticides can reach over 80%, the persistence and effect also are also better.5.Suggest that it’s best to prevent the pest as principle in the Panax notoginseng pest plague prevention, coordinated with field management and plant disease prevention, principally, control the main pests like Formicococcus Takahashi, Bemisia tabaci, Tetranychus cinnabarinus, Agriolimax agrestis etc., and avoid to kill their enemy, choose efficient, low toxicity, low residual pesticides and rotate these pesticides properly. |
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