Moutan bark medicinal resources, pest control

Medicinal Resources and Pest Control of Cortex moutan

Due to the influence of environmental conditions and sweet root, peony is easy to be harmed by aboveground and underground pests.

1. Aboveground pests

The main results are as follows: (1) the shell insects are orange-red or orange-red all over the body, and the second generation occurs every year. The females often gather the petiole or stem to absorb juice, which makes the leaves yellow and the branches wither, resulting in the weakening of plant growth. When it is found that the damaged branches and leaves can be cut off and burned, the larvae can be sprayed with 1000-1500 times dichlorvos or omethoate during the hatching period, pesticides should be used cautiously in order to ensure the quality of medicinal materials, and spraying branches with 3~5.5Be °stone sulfur mixture before dormant or early spring germination has a better control effect.

(2) the longicorn beetle is "Chinese peony sawing longicorn beetle", commonly known as "woodpecker". The adult is cylindrical, the larva is milky white, the head is small and fat, and it has a generation of 3 years. From May to June, the larvae hatched into the root, stem and medulla, harming the plant, not easy to find, resulting in plant weakness or death. After years of experiments, 3-4 holes were drilled in the rhizosphere of peony, the depth was about 20cm, one piece of aluminum phosphide was put into each hole, or the seedlings with insect pests were fumigated with aluminum phosphide in an airtight room, and the success rate was as high as 100%. Therefore, aluminum phosphide fumigation is a better way to control longicorn beetles. Before the larvae drill, the larvae can be sprayed with 3000 times of chlorobenzamide.

(3) from the middle of July to the end of August, the yellow diamondback moth changed from larva to adult, and the whole body was yellow-orange. Feed on the lower epidermis and mesophyll of the leaves to make holes in the leaves. In serious cases, eat up the whole leaves, cocoon and pupate in the soil after maturity, and the larvae spin silk around the branches. Pick cocoons or break cocoons on tree trunks in autumn and winter to reduce the source of insects. The leaves and stems damaged by insects were removed and destroyed in summer, and 1000-1500 times dichlorvos was sprayed on the back of peony leaves, which greatly reduced the survival rate of larvae.

Contact information for purchasing medicinal peony seedlings Wechat; 18374545223

2. Underground pests

The main results are as follows: (1) the damage of grubs is the most serious from May to September. It is mainly harmful to the root of the peony, biting it into uneven imperfections or holes, which in serious cases will cause the death of the root of the peony and cause the growth of the aboveground part to weaken or wither. 2000 times of 50% phoxim or 1000 times of 90% trichlorfon were irrigated to the roots, 250 g of 5% phoxim particles were applied to the soil surface per mu (667m2), and then turned deep into the soil.

(2) the ground tiger is the most harmful in spring and autumn, often biting off the seedlings from the ground or eating the ununearthed buds. The occurrence is more serious in the weedy land, which occurs for several generations every year, which varies with the climate of different places. The first generation of adults usually appears in late May. In terms of prevention and control, the weeds on which the land tiger depends for survival can be removed. The young larvae were sprayed with 98% trichlorfon crystal 1000 times or 50% phoxim EC 1200 times. The advanced instar larvae can be mixed with 30 parts of chopped fresh grass and 1 part of trichlorfon powder, and then sprinkled in the field in the evening.

(3) mole cricket mainly gnaws on root bark and buds and seedlings. Bean cake or wheat bran can be used as poison bait, which can be trapped in the field in the evening, or trapped by light at night.

(4) Root knot nematodes usually form the most root knot from May to June, and occur most in the depths of 5-10cm soil layer. The main damage to the root of peony, the disease occurs on the root, there are tumors of different sizes, yellow-white, hard texture, white glossy nematodes can be found after cutting, causing leaves to turn yellow at the same time, causing leaves to fall early in serious cases. 80% dichloroisopropyl ether EC particles were applied to the depth of 5~10cm, 5-10g per plant, once a year. The root can also be irrigated with 1.8% avermectin 1000 times solution.

Contact information for purchasing medicinal peony seedlings Wechat; 18374545223