Prevention and Control of Common Diseases and insect pests of Panax Notoginseng

Panax notoginseng (Panax notoginseng) is a perennial herb of the family Acanthopanax, and its position in the production of traditional Chinese medicine is second only to ginseng. Common diseases and insect pests are blight, anthrax, root rot, blight, aphids, red spiders and scale insects.

The main results are as follows: 1. Vertical blight mostly occurs in the high-wet and low-temperature season from April to May, which harms the base of seedlings. In severe cases, the seedlings die in pieces, and the seeds and seeds sprout black-brown and rot. After the seedlings are killed, water-stained yellow-brown stripes appear at the base of the pseudostem (petiole). With the development of the disease, the disease became dark brown, the disease part constricted, and the seedlings collapsed and died. Prevention and cure method: irrigate root and spray with 500 × 800 times liquid of 70% dimethazone wettable powder.

2. Anthrax: damage to leaves, petioles, stems, flowers and fruits. When the seedlings became ill, fusiform reddish brown spots or long stripe constricted spots appeared at the base of the pseudostem (petiole), causing the seedlings to break and lodge. If necrotic spots occur at the top, the seedlings will wither at the top. The disease spot of the leaf is grayish green, with concentric wheel lines, and then turns brown, with a pile of pink or black spores, and later rupture and perforation. Stem and petiole disease, resulting in fusiform yellow-brown ulcer spots, resulting in petiole disc bending and stem twist, resulting in dried flowers and dried seeds. The disease spot at the base of the stem not only causes adult plant lodging, but also induces sheep intestinal head (rhizome bud) rot. The fruit was killed to produce round or irregular light yellow sunken spots, and the pericarp rotted. Prevention and control methods: use 50% carbendazim wettable powder 800 Mel 1000 times solution, 75% methyl topiramate wettable powder 1000 times solution and other medicament control.

3. Root rot disease mostly occurs in the rainy season in June, July and August. The longer the planting years are, the more serious the disease is. The diseased plants often rot first from the lateral roots and extend to the main roots, or yellow-brown disease spots appear at the head of the rhizome and the base of the stem, which continue to expand and spread, resulting in all rot, abnormal leaf color of the diseased plants, and then wilting and drooping until the whole plant dies. Control method: irrigate the root with 58% Ruidu wettable powder or 50% carbendazim wettable powder 300 × 500 times.

4. Epidemic disease: panax notoginseng epidemic disease often occurs in rainy season, the shade shed of Panax notoginseng garden is too dense, too much humidity is easy to harm, and the disease is mild when the drought and less rain weather turns cool. At the initial stage of the disease, dark green irregular disease spots appeared on the leaves or petioles, which seemed to have been scalded by boiling water, and then turned brown and soft rot, withered and drooped and even adhered to the stem. The rhizome is damaged to produce yellowish-brown rot. The method of prevention and control is to strengthen field management, reduce temperature and humidity, remove the remains in time and burn them centrally, and spray them with 65% Dysen zinc wettable powder 500 times.

5. Aphids: damage to stems and leaves, wrinkle leaves, dwarf plants, and affect growth. Control method: spray leaves with 1500 times liquid of Mobilang and 2000 times of aldicarb.

6. Red spider: cluster on the back of the leaf to absorb juice to make it yellowing, withering and falling off. The harm is serious from June to October. The disk and fruit are shrunk and shriveled after being damaged. Prevention and treatment methods: ① cleaned Panax notoginseng garden; ② sprayed 0.2mur0.3 Baumetu stone sulfur mixture once every 7 days after late March, and sprayed 5% nisolone 20004000 times during the peak period of ③ from June to July.

7. Scale insects generally begin to occur in June every year, and do harm to stems from the ground after heavy rain, to flower rachis and petiolules after July, and to serious damage from August to October. The insect attached to the stem, flower axis and floret rachis to absorb juice. after being killed, the plant grew poorly, the florets turned yellow, and in serious cases, the dried flowers and fruits withered and fell off. Control methods: during the occurrence period of ① insect pests, strengthen the inspection, and find that there are insects on the plant and kill them by hand in time; after the occurrence of insect pests in ② Panax notoginseng orchard, use 40% speed to kill 1000ml 2000 times solution and 25% Youle 1000 2000 times liquid spray in the juvenile stage of scale insects.