Prevention and Control of Illicium verum Diseases and insect pests in Chinese Medicinal Materials

Disease

1. Anthracnose is harmful to leaves, fruits and shoots of seedlings. One-year-old seedlings below 0.5m are vulnerable. When serious, it causes fallen leaves, flowers and fruits. Prevention and control: select disease-resistant varieties. Clean up the overdense forest, remove the branches and fruits of diseases and insect pests in time, and improve the permeability of the stand. At the initial stage of the disease, 70% mancozeb wettable powder 0.167% solution or 50% carbendazim wettable powder 0.125% solution, 80% anthrax 0.125% 0.167% solution spray prevention and treatment, spray once every 7 to 14 days, a total of 2 spray 3 times.

2. Soot disease is also known as coal pollution disease. Damage to branches, tender shoots, flowers and fruits, and affect the photosynthesis of leaves. Prevention and treatment: at the initial stage of the disease, 70% thiophanate-methyl wettable powder 0.125% solution or 58% metalaxyl manganese-zinc wettable powder 0.125% solution was sprayed, once every 7-14 days, for a total of 2-3 times. Or spray 40% dimethoate EC mixed with water at 1 ∶ 1, which is now used.

3. Ring disease harms seedlings. Prevention and control: spray 0.5 ∶ 1 ∶ Bordeaux solution (i.e. copper sulfate 250g, lime 500g, water 500g) or 50% carbendazim wettable powder 1000 times, 50% carbendazim wettable powder 600 times 800 times, spray 2 times for 3 times.

4. Brown spot is also known as chlorosis. In severe cases, it causes fallen leaves or dead branches. Prevention and treatment: the initial stage of the disease was sprayed with 1 ∶ 1 ∶ Bordeaux solution or 75% chlorothalonil 0.1% solution and 75% methyl thiophanate 0.1% solution, once every 10 to 15 days, for a total of 2 times.

Insect pest

1. The larvae of star anise inchworm are harmful to leaves.

Control: catching larvae, digging pupae, trapping adults by black light, killing eggs by Trichogramma and black egg wasps, killing larvae and pupae by parasitic wasps, parasitic flies and Bacillus thuringiensis. Spray with 80% dichlorvos emulsion 0.1% dichlorvos 0.125% solution or 20% fenpropathrin 0.1% solution.

2. Golden flower bug is also known as star anise leaf beetle. Larvae and adults are used as harmful leaves, buds and shoots.

Cure: when the humidity is high after rain, spray Beauveria bassiana powder to kill larvae and adults. The artificial killing was carried out by using the pseudo-death, phototaxis, oviposition and pupation habits of golden flower insects. Spray 4.5% bifenthrin 0.2% solution or 80% dichlorvos 0.1% solution before the 3rd instar larvae.

3. The adults of red wax scale insects damage tree trunks, leaves and branches, and soot disease is caused by secretions and feces at the same time.

Prevention and control: combined with pruning, cutting off insect branches and leaves, centralized burning, with 40% speed killing EC 0.083% 0.125% solution spray control.

4. The weevil eats its larvae downward in the branches, causing the branches to die.

Prevention and treatment: spray 4.5% bifenthrin 0.05% permethrin 0.067% solution or 80% dichlorvos EC 0.125% solution during the onset period. Spraying Beauveria bassiana once on a wet and rainless day in May for 2-3 years can control the damage of the weevil.