Special Topics on Orchid Diseases and insect pests

Picture 1: White silk disease

Preventive use of white silk disease at ordinary times: pesticide name: methyl Likuling EC; action characteristics: internal absorption of 20% fungicide; usage: 800 times / 2-3 times / 10 days interval. It can also be prevented from Fusarium wilt and vertical blight.

White silk disease: prevention and treatment supplementary note: White silk disease is the cause of soil "plant material" internal cause, plant material acidity is too high and more prone to infection, suggestion one, you can choose rice straw ash to sprinkle on the basin, or soak water to rinse ammonia and acid in the basin, change PH in the basin and so on.

Second, usually about 20 days with Dixong 1000 times 10 Antaisheng 70% 500 times mixture, root irrigation and head wetting, can achieve a certain effect.

Picture 2: Brown spot + anthrax

Brown spot + anthrax, daily preventive use: pesticide name: 77% can kill wettable powder; action characteristics: broad-spectrum protective fungicide; usage: 1000 times liquid / 3-4 times / 7-day interval spray / leaf back, leaf surface; at the same time, it can be prevented: Brown spot, anthracnose, leaf spot, ring spot, bacterial brown spot.

Pesticide name: 25% propiconazole EC; action characteristics: broad-spectrum internal absorption fungicide; usage: 1500 times / 2-3 times / interval 8 days spray / leaf back, leaf surface; at the same time can prevent: leaf spot, round spot, anthrax, leaf spot, leaf tip blight

Brown spot + anthrax, supplementary instructions for prevention and control: first, the use of milk pesticides, as far as possible in the early and late, medication, can avoid hurting buds and reduce drug damage

Second, the usual use of drugs should be exchanged and drug resistance can be avoided.

Picture 3: Brown embroidery disease

Preventive use of brown embroidery disease: pesticide name: 20% nitrilazole EC; action characteristics: internal absorption fungicide; usage: 2500 times liquid / 2-3 times / 7-day interval spray / leaf back, leaf surface; at the same time can prevent: Brown rust

Photo 4: black spot

Preventive medication for black spot disease:

Pesticide name: 80% mancozeb wettable powder; action characteristics: broad-spectrum protective germicidal powder; usage: 800 times / 3-4 times / 6-day interval spray / leaf back, leaf surface; at the same time: anthrax, leaf spot, mildew, black spot, round spot, ring pattern.

Pesticide name: 10% Gaoshui Fangsan granule; action characteristics: broad-spectrum internal absorption fungicide; usage: 3000 times / 2-3 times / 8-day interval spray / leaf back, leaf surface; at the same time, it can prevent: Brown spot, leaf spot, black spot, round spot, leaf blight, leaf spot, leaf tip blight, fouling mildew.

Pesticide name: 25% Spock milk; action characteristics: broad-spectrum germicidal fungicide; usage: 1500 times / 2-3 times / 8-day interval spray / leaf back, leaf surface; at the same time, it can prevent: anthracnose, leaf spot, mildew, black spot, round spot, ring streak.

Pesticide name: 50% Shibao wettable powder; action characteristics: broad-spectrum fungicide; usage: 2000 times / 2-3 times / 8-day interval spray / leaf back, leaf surface; at the same time, preventable: anthracnose, leaf spot, mildew, black spot, round spot, ring streak

Black spot added: in general, the symptom structure of black spot is roughly the same as that of round spot and leaf spot, and the damage to orchid leaves is more or less the same. so usually sterilization can be properly selected regular sterilization of these three diseases are orchids better control diseases.

Picture 5: black spot + anthrax

Preventive medication for black spot + anthrax:

Pesticide name: 50% Shibao wettable powder; action characteristics: broad-spectrum fungicide; usage: 2000 times / 2-3 times / 8-day interval spray / leaf back, leaf surface; at the same time, preventable: anthracnose, leaf spot, mildew, black spot, round spot, ring streak

Pesticide name: 25% Spock milk; action characteristics: broad-spectrum germicidal fungicide; usage: 1500 times / 2-3 times / 8-day interval spray / leaf back, leaf surface; at the same time, it can prevent: anthracnose, leaf spot, mildew, black spot, round spot, ring streak.

Pesticide name: 80% mancozeb wettable powder; action characteristics: broad-spectrum protective germicidal powder; usage: 800 times / 3-4 times / 6-day interval spray / leaf back, leaf surface; at the same time: anthrax, leaf spot, mildew, black spot, round spot, ring pattern.

Black spot + anthrax supplementary explanation: first, general black spot, round spot, leaf spot is good control, but in addition, anthrax at the same time must pay attention to the use of drugs, because of anthrax control prescription, most of them are milk or mancozeb type, so medication must pay attention to weather temperature and ultraviolet index.

Second, the temperature is over 30 degrees as far as possible to avoid milk, copper medicine, the weather is too high ultraviolet light as far as possible before 5: 00 in the morning or after 6: 00 in the evening. Photo 6: ring disease

Picture 6.1 "anaphase" of ring disease

Preventive medication for ring disease:

Pesticide name: 77% can kill wettable powder; action characteristics: broad-spectrum protective fungicide; usage: 1000 times liquid / 3-4 times / 7-day interval spray / leaf back, leaf surface; at the same time, it can prevent: Brown spot, anthrax, leaf spot, ring leaf spot, bacterial brown spot.

Pesticide name: 25% Spock milk; action characteristics: broad-spectrum germicidal fungicide; usage: 1500 times / 2-3 times / 8-day interval spray / leaf back, leaf surface; at the same time, it can prevent: anthracnose, leaf spot, mildew, black spot, round spot, ring streak.

Pesticide name: 50% Shibao wettable powder; action characteristics: broad-spectrum fungicide; use 2000 times / 2-3 times / interval 8 days spray / leaf back, leaf surface; at the same time can prevent: anthracnose, leaf spot, mildew, black spot, round spot, ring streak

Pesticide name: 80% mancozeb wettable powder; action characteristics: broad-spectrum protective germicidal powder; usage: 800 times / 3-4 times / 6-day interval spray / leaf back, leaf surface; also preventable: anthracnose, leaf spot, mildew, black spot, round spot, ring streak

Ring disease added: the disease is often regarded as a general leaf spot or black spot before the diseased orchid leaves are withered. Ring disease is one of the diseases with wet yellow spots in the outer circle of the disease spot, but it is also one of the diseases that can be well controlled.