Diseases and insect pests of Panax notoginseng

(1) Blight disease is also known as "rotten foot plague". Pathogen is a kind of half-known fungus in fungi, which harms seeds, buds and seedlings. The seeds rotted in the shape of milky white pulp, the seed buds died in dark brown, the base of the injured pseudostem (petiole) showed a dark brown ring depression, and the seedlings collapsed and died.

Control method: disinfect the soil with carbendazim or Arnebia solution before sowing ①. ② found that the diseased plant was removed in time, sprinkled lime powder around the diseased plant, and sprayed 50% methyl topiramate 1000 times or 50% methyl rifampicin 1000 times solution.

(2) Root rot, also known as "chicken shit rot", is a kind of half-known fungus in fungi, which harms the roots, and the black-brown roots gradually rot in the form of gray-white pulp, with fishy smell.

Prevention and control methods: ① selected good drainage plots for planting, timely drainage in the rainy season. When transplanting ②, Panax notoginseng without disease was selected. ③ removed the diseased plants and disinfected the acupoints with lime in time. During the onset of ④, the disease area was irrigated with carbendazim 100 times or 50% methyl topiramate 1000 times.

(3) the blight is also known as "rotten leaves". The pathogen is a kind of algal bacteria in fungi, which mainly harms the leaves, and the damaged leaves are dark green water stains. From June to August, the disease was serious when it was hot and humid.

Prevention and control methods: (1) clean the countryside, pick up the dead branches and leaves in winter and burn them centrally. (2) spray Bordeaux solution at 1:1:50 before onset, once a semimonthly, 2-3 times in a row, and spray 65% Dysen zinc 500 times, or 50% acetaminophen 1000 times, or dimethazone 1000 times, once every 7 days, 2-3 times in a row.

(4) anthrax pathogen is a kind of half-known fungus in fungi, which harms the aboveground, the leaf spot is yellow-brown, with obvious brown edge, the late spot is small black spot, easy to perforate; the petiole and stem spot is a central sunken yellow-brown prism spot; the disease spot on the fruit is round and concave brown spot, and the disease is severe in high temperature and humidity.

Control method: ① cleans the countryside and burns dead branches and leaves in time. ② chooses disease-free Panax notoginseng as seed, soak it in Bordeaux solution before transplanting, cool and dry, then transplant. ③ seeds are soaked in formalin 100-150x l0min, washed with clean water, dried and sown. During the onset of ④, 65% Dysen zinc 500 times or 50% acetaminophen 1000 times solution, once every 7 days, 2-3 times in a row.

(5) the soil name of rust is "yellow greasy" and "yellow blister". The pathogen is a kind of basidiomycetes in fungi, which mainly harms the leaves. The disease on the leaves initially shows small yellow spots with needles protruding, enlarged in a round or radial shape, and the edges are irregular. The spores of the pathogen lost yellow powder after the spores broke.

Control methods: ① cut off the stems and leaves of diseased plants in winter and sprayed Baume 1-2 degrees stone sulfur mixture. During the onset of ②, the patients were sprayed with 200-300x dinitrate powder or Baume 0.3-degree stone-sulfur mixture, or 300x diazepam sodium solution, once every 7 days for 2-3 times.

(6) the pathogen of powdery mildew is a kind of half-known fungus in fungi, which mainly harms the leaves, and the diseased leaves are covered with gray-white powder.

Control methods: ① winter clearing garden and cutting off the leaves of diseased plants, spraying Baume 1-2 degrees stone sulfur mixture. At the initial stage of ②, Baumet 0.3 degree stone sulfur mixture or 50% methyl topiramate 1000 times solution, once every 7 days, 2-3 times in a row.

(7) the short beard mite, also known as the fire spider, belongs to the family Araneae. The adults and nymphs gather on the back of the leaves to suck the juice and draw the net. Make the leaves yellow and finally fall off. The disk and red fruit are shrunk and shriveled after being damaged.

Control method: clear the garden in ① in winter, pick up the litter and burn it, and spray Baume 1 degree stone sulfur mixture after clearing the garden. In April, ② began to spray Baume 0.2-0.3 degree stone sulfur mixture or 1500-2000 times with 20% triclofenac wettable powder or 25% insecticidal amidine water agent 1500-1000 times, once a week, several times in a row.

(8) ground tigers see the prevention and control methods of ginseng.

(9) slugs, also known as snails or slugs, are molluscs. Bite the seed buds, the stems and leaves are engraved. Hazards of feeding at night and early in the morning.

Prevention and cure method: ① turns over the soil in winter. Before planting ②, 300-375kg tea seed cake was used as base fertilizer per hectare. During the occurrence of ③, the border was sprayed with lime powder or 3% lime water.