Cucumber damping-down
Cucumber damping-off disease, commonly known as "card neck", "small feet", "falling seedlings", etc., is one of the common diseases of cucumber seedlings in winter and spring.
Cucumber damping-down symptoms
Pythium delphiniae infestation caused damping-off caused by cucumber seedlings. The roots were light yellow water-stained at 12 hours after onset. Hyphae grew on the roots. After 24 hours, the stem base was water-smelled and the root discolored and deepened. After 48 hours, the roots became discolored. Roots, stems, and leaves are light yellow water-stained soft rot that can produce a large amount of oospores in the root tissue, causing the epidermis to grow taller in the root or causing the cortex to rupture.
The characteristics of damping-off of cucumber
Cucumber damping-off is the main disease of cucumber during seedling stage. The nursery period is the most common in the protected area, especially when the temperature is low and the soil moisture is high. This can cause bad seeds, rotten buds, and seedlings to stumble.
In the low temperature, high humidity, the soil contains many organic matter, the application of unfamed manure, etc. are conducive to disease. Poorly ventilated seedbeds, lack of light, and high humidity are not conducive to the growth and development of seedling root systems, and can easily induce the occurrence of damping-off.
Cucumber damping-off measures
(1) Prevention is the main comprehensive control. The seedbed should be selected in a plot sheltered from the wind and sunny in Gaoshao. The requirement is conducive to drainage and the temperature of bed soil is adjusted, which is conducive to lighting and improving ground temperature.
(2) The selection of Nongda No. 14, Zhongnong No. 7, Chunxiang, Jinchun No. 3 and other early-maturing varieties with low temperature and low light resistance. Nursery beds need to be renewed if bed soil is fermented with compost or fermented organic fertilizers that are fermented with enzymes, and the soil used in old vegetable gardens is often used as bed soil. Although soil is fertile, there are many pathogens in the soil. Therefore, we should try to use new ones. earth. When the old bed soil must be used, the surface soil should be sterilized by high temperature on a heated iron plate or burned with boiling water. Chemical disinfection can also be used to kill the bacteria in the soil. The specific approach is: 15-20 days before sowing, per square meter of seedbed with 40% of the mixture of powdered seedlings plus 50% omeprazole powder 1:1 mixture or with 40% dressing double powder 8 grams per square meter, Fine dry soil 40 kg, fully mixed and ready for use, soaking the bottom water before sowing, until the water infiltration, take 1/3 of the mixed soil to withdraw on the bed, and then sowing the seeds of good buds Finally, the remaining 2/3 of the medicine soil is covered on the seeds, covering a thickness of about 1 cm, so that the seeds are caught in the middle of the soil. This method can prevent damping-off, and can also cure damp-blight.
(3) Cucumber seeds were sterilized with warm water at 50°C for 20 minutes, or after germination at 70°C for 72 hours, germination had certain effects. Promote the use of cucumber seed coating agent No. 9-2, the amount of which is 0.5% of the seed weight (effective ingredient amount), converted into a commercial volume of (0.5100) 20 = 2.5 grams, that is, 2.5 ml mixed with 100 grams of seeds.
(4) The compost produced from Japanese enzyme bacteria is applied to seedbeds or greenhouses to reduce the amount of fertilizers and pesticides used to produce pollution-free vegetables.
(5) Hot water circulating hotbed breeding method. In the middle of a leeward sunny day or a sunlit plastic greenhouse, dig a seedling filer 25 centimeters deep and insert a wooden file at 10 centimeters between the two ends. Wind the plastic hose around the raft according to the hotline method. The hose is about 1 cm in diameter. The inner diameter is greater than 0.2 cm, the outer wall thickness is 0.18-0.2 cm, and both ends of the hose are 50 cm away from the bowl. The water inlet is higher than the end of the bowl. It is 1.5 meters higher than the water heater and is lower than the outlet of the bowl. , The side is the backwater, the hose is covered with 20 centimeters of nutritious soil with water irrigation, 1 irrigation, the local temperature stability at 35 °C began to sow the seeds of buds, cover soil about 1 cm, and then cover the film And a small arch shed 40 centimeters tall. When the local temperature falls below 20°C, it begins to heat up the water from the inlet, and it can also be connected to a honeycomb briquette furnace or other heat source to make a hot water circulator (using an iron plate to form an aluminum pot). The effect is better, and the temperature is lowered after emergence. Eli seedlings thrive, with less incidence and faster emergence.
(6) After the seedlings are kept, the temperature of the nursery bed or shelf should be kept at 25-30°C during the day and 10-15°C at night to prevent cold currents from attacking. Seed beds or greenhouses should not be too high humidity, even the rain or rain or snow, or bed soil should not be less watering or not watering, watering can be used when watering can be used to avoid excessive humidity. When water droplets condense on the plastic film or glass and seedling leaves, timely ventilation or withdrawal of some of the ash will reduce the humidity.
(7) Choose a drip-proof membrane cover room to improve light conditions, increase light intensity, and use photosynthesis to increase seedling disease resistance.
Cucumber damping-down symptoms
Pythium delphiniae infestation caused damping-off caused by cucumber seedlings. The roots were light yellow water-stained at 12 hours after onset. Hyphae grew on the roots. After 24 hours, the stem base was water-smelled and the root discolored and deepened. After 48 hours, the roots became discolored. Roots, stems, and leaves are light yellow water-stained soft rot that can produce a large amount of oospores in the root tissue, causing the epidermis to grow taller in the root or causing the cortex to rupture.
The characteristics of damping-off of cucumber
Cucumber damping-off is the main disease of cucumber during seedling stage. The nursery period is the most common in the protected area, especially when the temperature is low and the soil moisture is high. This can cause bad seeds, rotten buds, and seedlings to stumble.
In the low temperature, high humidity, the soil contains many organic matter, the application of unfamed manure, etc. are conducive to disease. Poorly ventilated seedbeds, lack of light, and high humidity are not conducive to the growth and development of seedling root systems, and can easily induce the occurrence of damping-off.
Cucumber damping-off measures
(1) Prevention is the main comprehensive control. The seedbed should be selected in a plot sheltered from the wind and sunny in Gaoshao. The requirement is conducive to drainage and the temperature of bed soil is adjusted, which is conducive to lighting and improving ground temperature.
(2) The selection of Nongda No. 14, Zhongnong No. 7, Chunxiang, Jinchun No. 3 and other early-maturing varieties with low temperature and low light resistance. Nursery beds need to be renewed if bed soil is fermented with compost or fermented organic fertilizers that are fermented with enzymes, and the soil used in old vegetable gardens is often used as bed soil. Although soil is fertile, there are many pathogens in the soil. Therefore, we should try to use new ones. earth. When the old bed soil must be used, the surface soil should be sterilized by high temperature on a heated iron plate or burned with boiling water. Chemical disinfection can also be used to kill the bacteria in the soil. The specific approach is: 15-20 days before sowing, per square meter of seedbed with 40% of the mixture of powdered seedlings plus 50% omeprazole powder 1:1 mixture or with 40% dressing double powder 8 grams per square meter, Fine dry soil 40 kg, fully mixed and ready for use, soaking the bottom water before sowing, until the water infiltration, take 1/3 of the mixed soil to withdraw on the bed, and then sowing the seeds of good buds Finally, the remaining 2/3 of the medicine soil is covered on the seeds, covering a thickness of about 1 cm, so that the seeds are caught in the middle of the soil. This method can prevent damping-off, and can also cure damp-blight.
(3) Cucumber seeds were sterilized with warm water at 50°C for 20 minutes, or after germination at 70°C for 72 hours, germination had certain effects. Promote the use of cucumber seed coating agent No. 9-2, the amount of which is 0.5% of the seed weight (effective ingredient amount), converted into a commercial volume of (0.5100) 20 = 2.5 grams, that is, 2.5 ml mixed with 100 grams of seeds.
(4) The compost produced from Japanese enzyme bacteria is applied to seedbeds or greenhouses to reduce the amount of fertilizers and pesticides used to produce pollution-free vegetables.
(5) Hot water circulating hotbed breeding method. In the middle of a leeward sunny day or a sunlit plastic greenhouse, dig a seedling filer 25 centimeters deep and insert a wooden file at 10 centimeters between the two ends. Wind the plastic hose around the raft according to the hotline method. The hose is about 1 cm in diameter. The inner diameter is greater than 0.2 cm, the outer wall thickness is 0.18-0.2 cm, and both ends of the hose are 50 cm away from the bowl. The water inlet is higher than the end of the bowl. It is 1.5 meters higher than the water heater and is lower than the outlet of the bowl. , The side is the backwater, the hose is covered with 20 centimeters of nutritious soil with water irrigation, 1 irrigation, the local temperature stability at 35 °C began to sow the seeds of buds, cover soil about 1 cm, and then cover the film And a small arch shed 40 centimeters tall. When the local temperature falls below 20°C, it begins to heat up the water from the inlet, and it can also be connected to a honeycomb briquette furnace or other heat source to make a hot water circulator (using an iron plate to form an aluminum pot). The effect is better, and the temperature is lowered after emergence. Eli seedlings thrive, with less incidence and faster emergence.
(6) After the seedlings are kept, the temperature of the nursery bed or shelf should be kept at 25-30°C during the day and 10-15°C at night to prevent cold currents from attacking. Seed beds or greenhouses should not be too high humidity, even the rain or rain or snow, or bed soil should not be less watering or not watering, watering can be used when watering can be used to avoid excessive humidity. When water droplets condense on the plastic film or glass and seedling leaves, timely ventilation or withdrawal of some of the ash will reduce the humidity.
(7) Choose a drip-proof membrane cover room to improve light conditions, increase light intensity, and use photosynthesis to increase seedling disease resistance.
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