Diseases and insect pests of Trichosanthes

The main diseases and insect pests of Trichosanthes are Trichosanthes kirilowii spot blight, root rot, nematode disease, insect pests are grubs. The specific manifestations and control methods of trichosanthin diseases and insect pests are introduced below.

I. Diseases

1. Trichosanthes kirilowii spot blight: the death of the whole leaf caused by Cercospora fungi transmitted by conidia for many times began to occur in June, and the peak period of the disease was from July to September.

Trichosanthes kirilowii spot blight

Control methods: ① went into overwintering dormancy in autumn to sprout in spring, concentrated burning of residual leaves, ploughing early in spring, burying the diseased remains into the soil to reduce the source of primary infection. ② selected disease-free plants and planted them far away from last year's diseased plots; reasonable close planting; strengthening field management to enhance plant disease resistance. The diseased leaves were removed at the initial stage of the onset of ③, and the diseased leaves were sprayed with Bordeaux solution in the first ten days of June. One month later, 58% metalaxyl manganese zinc solution and 50% mancozeb solution were sprayed 2 times 3 times, once every 10 days.

2. Root rot: root rot caused by Fusarium. It occurred in early May and the rainy season was severe.

Root rot disease

Methods of prevention and treatment: disinfect the disease point with lime in time when discovering the diseased plant; select the disease-free plant to leave seed; clear the garden after harvest and burn the diseased and residual plant.

3. Nodal nematode disease: harms the root and causes root rot. In severe cases, the plant dies.

Control methods: turn the soil deeply and sun several times after harvest to kill pests; soil treatment, combined with drying soil, use 10 kg of 5 grams of phosphorus granules per mu, or 10% Yisoubao 5 kg, or 4% methyl isosaliphate EC 1 kg; treat the roots, soak the roots with 500 times of 25 grams of line phosphorus EC or 800 times of 4% methyl isophosphates EC for 15 minutes, then soak the roots for 15 minutes after drying Strengthen field management, pay attention to weeding during the growing period, and fully mature the application of machine fertilizer.

II. Insect pests

Grub: the larva of a beetle, which is mainly active in the soil and harms the roots of Trichosanthes kirilowii. It is serious in the soil with rainy summer, high soil moisture and more application of barnyard manure.

Grub

Beetle

Control methods: apply mature organic fertilizer to prevent adults from spawning; artificial hunting; when grub damage occurs in the field, the larvae near the rhizosphere of the damaged plant can be dug out; 1500 times phoxim solution is used to water the root of the plant.

For more knowledge about diseases and insect pests of traditional Chinese medicine, please pay attention to the medicinal material planting section http://www.kmzyw.com.cn/pages/channel_746/ in the knowledge column of Kangmei traditional Chinese Medicine Network.)