香樟病虫害防治（Camphor tree diseases and insect pests control）.docVIP

香樟病虫害防治（Camphor tree diseases and insect pests control） Pest control 1 years after several generations of moth larvae, shoots, killed dead seedlings. 200 - 300 times by 40% Omethoate Pensha larvae, while larvae pupate with tending forest land weeding hilling, kill insect pupa. Zhang longicorn main damage branch and lateral branch, using artificial hunting, or from a drain hole injection agent of dichlorvos. Shoot sprouting the sawfly larvae camphor leaves, seriously affected the growth of camphor tree. This pest in Henan province 1 years of 1~2 generation, in early May and early June were first and second generation larvae. 2000 times liquid spray marathon emulsion can be 90% or 50% trichlorfon kill. You can also use o.5kg rhododendronmolle or Tripterygium wilfordii powder and water, made of 75-100kg pensha. Orthagaachatinabutler groups assembled in the new shoot larvae feeding on the leaves and buds of silk curl up in a ball, wrap the crown, resulting in new dieback. The 2 generation larvae occurred in 1 years, the first generation larvae in late May to mid July on. The second generation larvae have not yet formed a net nest with 90% crystal trichlorfon 4000 ~ 5000 times Pensha, such as larvae have formed a network of artificial nests, can be removed to burn. Pest control The local feature of powdery mildew of Cinnamomum camphora The disease occurs in nursery seedlings. In high temperature, high humidity, seedling dense and poor aeration conditions most likely to occur. Grey brown spots appear on the back of leaves near the main vein, after spreading across the back of the leaves, and the emergence of a layer of white powder, dry twigs and serious is white. [Methods] prevention: 1, the nursery should always pay attention to sanitation, proper seedling thinning; or found a few plants should be immediately removed or destroyed. 2, with 0.3 - 0.5 degrees Baume lime sulfur mixture injection, once every 10, three or four times in a row. Black spot Camphor tree seed germ