Pest Control Techniques of Paris

Zhonglou, also known as seven leaves and a flower, flea, Chixiu, Chongtai root, etc., is a perennial herb with a long growth cycle and takes 8 to 10 years from sowing to harvesting. It is one of the main components of traditional Chinese medicine protected by the state, such as "Yunnan Baiyao" and "Gong Xuening". It has high planting prospects, so let's take a look at the pest control technology of the building.

Blight disease

[harm characteristics] Rhizoctonia solani is a seedling disease, which is serious in low temperature and heavy rain from April to May. At the initial stage of the disease, yellowish-brown water-stained disease spots appeared at the base of the seedling stem, and spread around the base, causing the seedlings to wither, and in serious cases, the seedlings withered and fell.

[prevention and treatment methods] ① strengthens the management of seedling bed, ventilates and transmits light appropriately. At the beginning of ② disease, spray 65% chlorothalonil wettable powder 500x diluent, 60% mancozeb wettable powder 500x diluent or 62.2% chloramphenicol water agent 600x diluent, once every 6: 10 days, 2 times for 3 times. ③ removed the diseased plants and adjacent diseased soil in time.

Black spot disease

[damage characteristics] the disease starts from the leaf tip or leaf base and produces round or subcircular disease spots, and sometimes the disease spreads to the flower axis, resulting in leaf withering and stem withering.

[prevention and treatment methods] ① should pay attention to drainage and dehumidification, reduce air humidity and reduce the incidence of the disease. 5% bacteriological detergent or 50% methyl thiophanate suspension was sprayed at the initial stage of the onset of ②.

Stem rot

[damage characteristics] Stem rot mostly occurred in the seedling stage, especially in the high temperature and rainy field stage. First of all, the yellow-brown disease spot is produced at the base of the stem. after the disease spot is enlarged, the leaf tip loses its drooping under water, and when it is serious, the stem base falls down with wet rot.

[control methods] ① rotates with Gramineae crops for more than 3 years. Before ② transplanting, 50% carbendazim wettable powder was sprayed on the seedling bed as a "marriage medicine". Diseased seedlings were removed by ③. In the initial stage of the disease of ④ in the field, 95% dimethazone wettable powder was used to irrigate the pond, once every 10 days, continuously for 2 or 3 times.

Anthrax

[hazard characteristics] anthracnose is caused by anthracnose, which produces punctate, nearly round or irregular brown spots on the leaves, light brown or grayish white in the middle of the spots, black spot fruiting bodies when high humidity is high, and dark brown edges of the spots. When the disease is serious, multiple spots on the leaves are connected into pieces, withering and dying, the pathogen overwinters in the soil remnants, and infects healthy plants when the rainy season comes in the second year. The conidia broke through the host epidermis through the conidium disk, and the conidia were repeatedly infected by wind and rain in the field, resulting in high planting density, poor drainage, wet overcast and rain, and serious disease in continuous cropping fields for many years.

[control methods] ① cleared the diseased and disabled tissues in the field in time. ② implements annual rotation and reasonable close planting with crops such as Gramineae or Leguminosae. At the beginning of the onset of ③, 50% trimethoprim (Sanfumi), 75% chlorothalonil, 80% anthrax Fumi wettable powder 800x solution, 40% fusilazole (flusilazole) 3000 times solution, 10% Shigao (oxyezole) water dispersible granules 2000 times solution, 30% Teflin (flurozole) wettable powder 1000 times solution spray control center disease plant.

Cataplexy

[hazard characteristics] the quenching disease is caused by Pythium. The symptom of the disease is infected from the base of the stem, the initial disease is watery, and spreads quickly to the upper ground, the disease does not change color or appears yellowish brown and constricts and softens, and the disease develops rapidly. sometimes cotyledons or leaves are still green, suddenly lodging, often only individual seedlings occur at the beginning, and spread rapidly around with the diseased plant as the center when the conditions are suitable. Form a disease area, high humidity is the main cause of the disease.

[prevention and treatment methods] at the initial stage of the disease, the roots were irrigated or poured with 2000 times of 70% dimethazone wettable powder, 25% metalaxyl wettable powder and 68.75% silver farinol (fluoromycete ·aldicarb) suspension 2000 times, sprayed once every 7 days, continuously for 2 times. After the onset of the disease, the diseased plants were removed in time and the disease area was irrigated with quicklime water.

Underground pest

[hazard characteristics] the underground pests of heavy buildings are beetles (soil silkworms), mole crickets, ground tigers, golden needle worms, etc., which are mainly damaged when they emerge from the heavy buildings, biting off the plants or eating up the leaves or biting the roots into holes.

[control methods] chemotactic trapping and killing is carried out according to the living habits of different pest species, for example, beetles tend to dark light, are trapped and killed by black light, mole cricket has phototaxis, dung and preference for sweet and fragrant things, black light, wheat bran poison bait with poisonous fresh horse dung and fried incense can be used to trap and kill adults with black light, sex bait, sweet and sour wine bait. The agents used for poison bait are 80% trichlorfon soluble powder and 50% phoxim EC. 3% phoxim granules and 10 kg fine soil per mu can be scattered next to the heavy building plant.

Aboveground pests

[damage characteristics] thrips are the main aboveground pests in heavy buildings, and adults and nymphs suck sap on plant leaves, resulting in mosaic, poor growth and transmission of virus.

[control methods] the internal absorption insecticides were sprayed with 1500 times of dimethoate and 5000 times of imidacloprid, once every 15 days for 2 or 3 times.