Pest control techniques of evening primrose

Evening primrose is also known as Evening Primrose, mountain sesame, wild sesame, for the willow leaf plant, evening primrose under the plant. Strong adaptability, acid and drought resistance, lax soil requirements, generally neutral, slightly alkaline or slightly acidic soil, good drainage, loose soil can grow, the soil is too wet, the root is easy to get sick. There are annual plants in the north and biennial plants in the south of the Huaihe River. It is the most important nutritional drug discovered in this century. It can treat a variety of diseases, regulate blood lipids, and has a significant effect on coronary artery infarction, atherosclerosis and cerebral thrombosis caused by high cholesterol and hyperlipidemia. Flower words for silent love, unruly heart.

Evening primrose spot blight

The disease is mainly caused by damage to leaves. After the disease, the disease spot on the leaf is round, light brown, 2mm in diameter, purplish red at the edge, brown in the middle, and dense small black spots. When the disease is serious, it will cause the leaves to die. The pathogen is Septoria oenotherae Westd., which belongs to the subphylum of semi-knowns and fungi of the genus Cercospora. The pathogen overwintered with conidia and mycelium in the residual body, and the conidia were released for primary infection after water absorption by conidia in the following spring. The transmission of the disease in the field mainly depends on raindrop spatter and airflow, and the seed carries bacteria to cause long-distance transmission. High temperature, high humidity and continuous rain are beneficial to the disease. The disease is easy to occur due to poor cultivation management and weak plant growth. The high temperature and rainy season from July to August is the peak period of the disease.

Control methods: ① thoroughly cleared the diseased and residual leaves in the field in autumn and burned them or buried them deeply in order to reduce the amount of overwintering bacteria in the field. Before sowing ② seeds, soak the seeds with 50% carbendazim or 50% mancozeb 500x solution for 30 minutes, and then sow them after drying. At the initial stage of the onset of ③, 50% mancozeb 500x solution or 50% carbendazim 600x solution and other agents were sprayed once, with an interval of 10 to 15 days.

Evening primrose rot

The roots of the diseased plants will gradually change color and rot, and the leaves will wilt and wither, leading to the death of the whole plant. The prevention and control method can use 1% lime water, or 1500 times of 50% topiramate, or 1000 times of 75% chlorothalonil.

Copper green beautiful golden turtle

This kind of disease and insect will harm the seedlings when they are larvae and the petals when they are adults in flowering stage. ① is a method of artificial killing. ② uses fried fragrant wheat bran and 90% crystal trichlorfon 30 times solution to become poison bait. ③ will bait directly with 50% phoxim EC at 1:1 to trap.

Coal pollution disease and wheel disease

It can be sprayed with 500 times solution of 50% methyl topiramate wettable powder.

Damage to aphids, scale insects and whitefly

1000 times of fenitrothion EC, Uranus, cypermethrin and Kuaishaling can be used for control, and the effect is better.

Mites and crustaceans

Mites can use anti-mite 23 EC 800x solution, 73% acarate 2000 times solution, and so on. To control shell insects, you can use 40% dimethoate emulsion 600-800 times.

Control of Fusarium wilt

It can be sprayed with wilting Rick 600 times 800 times liquid, 50% carbendazim 600 times liquid and so on. If a wilted plant is found, it should be removed in time and burned outside the garden, and the soil around the diseased plant should be opened and sown with quicklime, and then replanted one month later.