Special Topics on Orchid Diseases and insect pests

Picture 1 round sheath disease + anthrax "spiny spores"

Ring streak + anthracnose "Cercospora spinifera" preventive medication:

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: 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 streak + anthracnose "spiny spores" supplementary note:

First, as most of the prescriptions for anthrax control are milk milk or mancozeb, the use of drugs must pay attention to weather temperature and UV 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.

Third, it is suggested that in the normal use of drugs, we can choose to use a mixture of two prescriptions of germicidal poison, so that it can be used for many aspects of treatment and defense.

Picture 2 round sheath disease + leaf spot disease

Preventive medication for ring disease + leaf spot disease in peacetime

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

Pesticide name: 77% Kill wettable powder; functional characteristics: broad-spectrum protective fungicide; usage: 1000 times liquid / 3-4 times / 7-day interval spray / leaf back, leaf surface; also preventable: Brown spot, anthrax, leaf spot, ring disease, bacterial

Ring disease + leaf spot disease supplement: the disease is often regarded as a general leaf spot or black spot before the diseased orchid leaves are dried up. 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.

Second, it is suggested that in the normal use of drugs, we can choose to use the mixture of the two prescriptions of germicidal poison, so that it can be used for many aspects of treatment and defense.

Picture 3 mild, element deficiency disease "zinc, zinc, zinc"

Mild, element deficiency disease "zinc, salt, salt" supplementary explanation: usually fertilize to supplement some trace elements and fertilizers with zinc, magnesium, salt and salt.

Picture 4 "rot + black spot"

Pesticide name: 72% agricultural streptomycin sulfate wettable powder; action characteristics: antibiotic fungicide; usage: 800 times / 2-3 times / 7-day interval spray, root irrigation; at the same time can prevent: bacterial brown spot, soft rot

Additional explanation: because of the simultaneous occurrence of fungus and fine grains, it is necessary to use a mixture of two different fungicides, because the mixture of the two fungicides has its own concentration multiple, which often troubles the novice orchid. Here re-supplement: proportion: need 100jin of water, use of bacteria, chloramphenicol 500 times mixed with bacteria, carbendazim, 1000 times.

1. 500 times the weight of 100 jin of water to chloramphenicol sulfate is equal to the amount of 100 grams required.

2. 1000 times the weight of 100 jin of water is equal to the amount of 50 grams of carbendazim.

Third, only when 100g of chloramphenicol sulfate is equal to "500g" and 50g of carbendazim is equal to "1000 times" and mixed with 100jin of water at the same time, it can be regarded as the correct dose mix.

Picture 5 Leaf tip anthracnose + leaf blight

Preventive medication for leaf tip anthracnose + leaf blight

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; also preventable: Brown spot, round spot, anthracnose, leaf spot, leaf tip blight

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

Leaf tip anthracnose + leaf blight supplementary note: because it is the cross symbiosis of two kinds of bacteria, it is suggested that it is relatively simple to control with two kinds of fungicides. The mixed mode of the two kinds of fungicides is repeated here.

If two kinds of diseases occur at the same time, it is necessary to use a mixture of two different fungicides, because the mixture of the two fungicides has its own concentration multiple, which often troubles the novice orchid. In this new supplement: the proportion: need 100jin of water, use 1000 times of carbendazim mixed with chloramphenicol sulfate for bacteria.

1. 500 times the weight of 100 jin of water to chloramphenicol sulfate is equal to the amount of 100 grams required.

2. 1000 times the weight of 100 jin of water is equal to the amount of 50 grams of carbendazim.

Third, using 100g of chloramphenicol sulfate equal to "500g" + 50g of carbendazim equal to "1000 times" and putting it into 100jin of water at the same time can be regarded as the correct dose mix.

Picture 6 Leaf margin black spot

Prophylactic medication for leaf margin 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 can be prevented 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 / interval 8 days, spray / leaf back, leaf surface; at the same time, it can prevent: Brown spot, leaf spot, black spot, round spot, leaf blight, ring pattern, leaf tip blight, fouling mildew.

Pesticide name: 25% Spock milk; action characteristics: broad-spectrum germicidal fungicide; usage: 1500 times / 2-3 times / interval 8 days, spray / leaf back, leaf surface; at the same time, preventable: 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 / interval 8 days, spray / leaf back, leaf surface; also preventable: anthracnose, leaf spot, mildew, black spot, round spot, ring pattern

Leaf edge black spot disease added: in fact, there are many orchid mosaic disease fungicides of similar nature, but as our professional introduction has to, it is necessary to withdraw all the conditions to Lan you for understanding. in the general choice of germicidal fungicides, broad-spectrum and internal absorption pesticides are the best.

Reminder: the key task of purchasing pesticides in my test is to select the credibility of the manufacturer and mark the ingredients, so as not to cause psychological comfort that there is already sterilization, resulting in fake medicine ingredients, resulting in the condition not being controlled and missing the prime time for medical treatment.

The second thing that causes harm is to think that the ingredients of these pesticides may not be enough, but the concentration and multiple of these pesticides may be increased. Who knows that this time the medicine is bought, and as a result, the multiple increases, causing serious drug damage, ! I have no choice but to ask the sky.

Picture 7 active illness

Preventive medication for service diseases in peacetime

Pesticide name: 72% Kelou wettable powder; action characteristics: internal absorption fungicide; mode of use: 1500 times liquid / 2-3 times / interval 10 days; at the same time can prevent: service disease

Pesticide name: 50% Anke wettable powder; action characteristics: internal absorption fungicide; use: 12500 times / 2-3 times / interval 10 days; at the same time can prevent: service disease

Supplementary instructions for the treatment of service diseases:

First, in the peak period of the disease, we must continue to use drugs to prevent, have understood the characteristics of stem rot, we can only use targeted sterilization.

2.72% of agricultural streptomycin sulfate soluble powder is 800x liquid, 77% can kill powder 1000 times liquid spray leaf back, leaf surface, head

Third, Mixianan "milk" 1500 times + tetracycline "powder" 2000 + acylmorphine "powder" 2000 times solution, spray leaf back, leaf surface, head

4. Antaisheng 500x + Mixianan 1500 times + Penicillium sulfate 500x spray leaf back, leaf surface, head

"fertilizers and pesticides must be sprayed on the back of the leaves, because the absorption of plants depends on the pores on the back of the leaves."

5. Every 20 days or so, the root was thoroughly irrigated with the solution of 800x of dimethazone + 3000 times of tetracycline.

Six: the use of germicidal fungicide must be exchanged for rotation, so as not to develop drug resistance and delay the disease.