Control Methods and Key Technical Points for Pests and Diseases of Honeysuckle

Honeysuckle, also known as silver flower or Japanese honeysuckle flower, is the dried flower bud of plants in the Caprifoliaceae family and several plants of the same genus. It has the function of clearing heat and detoxifying, and is suitable for diseases such as seasonal febrile diseases with fever, wind-heat common cold, sore throat, pneumonia, dysentery, and carbuncles, swellings, sores and ulcers. It is a commonly used traditional Chinese medicinal material, with annual national @#@136@#@ reaching 5.5 to 6 million kg. Honeysuckle is produced in most provinces and regions across the country, among which Shandong, Henan and Guangxi have the largest output and the best quality. Honeysuckle has relatively many pests and diseases, and doing a good job of prevention and control is one of the key measures to increase honeysuckle yield and ensure market supply.

1 Brown spot disease

A common leaf disease that causes the plants to grow weakly. It mostly occurs in the middle and late growth stages, with August to September being the peak period, and it is severe under rainy and humid conditions. In the early stage of the disease, small brown spots form on the leaves, which later expand into brown round spots or irregular lesions. Grayish-black mold-like substances grow on the underside of the lesions. When the disease is severe, the leaves fall off, affecting plant growth and flowering. Control methods: prune off diseased leaves, then spray with 1:1.5:200 Bordeaux mixture, once every 7 to 10 days, for 2 to 3 consecutive times.

2 Powdery mildew

The disease is severe under warm, dry or shaded conditions. In the early stage, small white spots appear on the leaves, which gradually expand into white powdery patches and continue to spread until they cover the entire leaf, causing the leaves to turn yellow, shrink and deform, and finally causing flowers and leaves to drop and branches to dry up. Control methods: clean the garden and dispose of diseased and residual plants; during the occurrence period, spray with 50% thiophanate-methyl 1000-fold solution or B0-10 biological preparation.

3 Anthracnose

The leaf lesions are nearly round. When humid, orange-red dot-like sticky substances appear on the leaves, which are large accumulations of conidia. Control methods: (1) Remove residual plants and diseased leaves and burn them in a centralized manner; (2) before transplanting, soak the seeds and planting material in 1:1:150-200 Bordeaux mixture for 5 to 10 minutes; (3) during the disease period, spray with 65% zineb 500-fold solution or 50% Tuzet 800-1000-fold solution.

4 Rust disease

After being affected, tea-brown or dark brown small spots appear on the underside of the leaves; on some leaf surfaces, nearly round lesions appear with a small pustule in the center, and in severe cases the leaves can die. Control methods: (1) After harvesting the flowers, remove dead plants and diseased leaves and burn them in a centralized manner; (2) in the early stage of the disease, spray with 50% dinitro compound 200-fold solution or 25% triadimefon 1000-fold solution, once every 7 to 10 days, for 2 to 3 consecutive sprays.

5 Aphids

They damage leaves and tender branches, causing leaves and flower buds to curl, growth to stop, and yield to drop sharply. From April to June, the insect situation is relatively severe, and around "Start of Summer", especially on rainy days, it spreads faster. Control methods: spray and kill with 40% dimethoate 1000-1500-fold solution or Tianyason (Mieyaling) 1000-1500-fold solution, repeatedly and continuously until they are killed.

6 Longhorn beetles

In May, adults emerge from the soil and lay eggs in the epidermis at the upper ends of branches. The larvae first activity within the epidermis, then bore into the xylem, feeding toward the base, and after autumn bore into the base or roots to overwinter. After being damaged, the plants gradually age, wither, and even die. Control methods: when adults emerge from the soil, drench the flower clumps with 80% trichlorfon 1000-fold solution. During the peak egg-laying period, spray with 50% phoxim emulsifiable concentrate 600-fold solution once every 7 to 10 days; when infested branches are found, cut them off and burn them; if there are insect holes, insert medicinal cotton soaked in undiluted 80% dichlorvos, seal with mud, and poison the larvae.

7 Inchworms

After the first crop of flowers, the larvae eat the leaves, causing reduced yield. Control methods: after the Beginning of Spring, dig the soil within 1 m around the plants to destroy the pupae. In the early stage of larval occurrence, spray with 2.5% rotenone emulsifiable concentrate 400-600-fold solution for control.