In the summer of this year, there are more hot and rainy weather in our province. The resulting poor growth of vegetables or the invasion of pests and diseases is even more serious, because the high temperature and high humidity environment can easily lead to the appearance of roots, leggy and other undesirable phenomena, and also the invasion of pests and diseases. Dying and happening create favorable conditions.
High-humidity effects: Under high humidity conditions, vegetable plants are in a state of water saturation and prone to leggy. In particular, eggplant vegetables and melon vegetables are particularly evident in this regard. After a prolonged growth of vegetable crops, cell walls become thinner, and the resilience of plant organs declines, and they are vulnerable to high temperatures, resulting in high-temperature burning of cell tissue and causing sunburn, which not only affects the growth of plants, but also results in a certain yield. influences. The moisture in the soil is in a state of saturation for a long period of time, which makes it easy for the root system to be in an oxygen-deficient state, causing the infection of roots and soil-borne diseases, leading to the emergence of "dead trees."
High-temperature effects: Continuous high-temperature weather and continuous rainy weather pose a greater threat to the vegetable seedlings cultivated in the autumn. Continuous high temperature weather not only affects the normal growth of seedlings, causing wilting growth, stagnation, etc., and the high temperature conditions tend to affect the flower bud differentiation of seedlings, resulting in a higher proportion of early flowering, fruit drop and abnormal shaped fruit, so that the benefit of the previous period is greatly reduced.
The impact on vegetable at seedling stage According to the author's understanding, taking the situation of vegetable planting in Shouguang City as an example, at present most of the vegetables are in the stage of nursery, and damping-off and blight of eggplant and melon are common. One of the symptoms of damping-off was a water-stained base at the base of the seedlings, which gradually contracted and fell to the ground. Bacterial disease often occurred when the true leaves were seen. The seedlings at the early stage of the disease wilted during the day and the stem base contracted. At present, the disease rate of these two diseases is relatively high, and other sclerotia, gray mold, downy mildew also occur to varying degrees.
The specific prevention and control methods are: First, agricultural control, renovation of field drainage facilities, clean gardens, use of sunny mornings, strengthen greenhouse ventilation, control the temperature within the shed; Second, chemical control, when the humidity is too high in rainy weather, smoke should be used Smoke method, use 20% of a smoked spirit or 20% of 100 grams of fast smoked smoked tablets in a greenhouse of 200 square meters, close the shed in the evening and smoke, and open the air the next morning. Spraying in clear weather to prevent dampness and downy mildew, choose 58% metalaxyl or 68% gold mine 600 times liquid; control damping-off, sclerotia, gray mold, use 50% procymidone 1500 times or thiophanate-methyl 1000 times.
Effects on Solanaceous Vegetables Solanaceous vegetables should be controlled after the planting, and watering should be done to make the waters hard to water and see wet, prevent excessive humidity, infect disease at the seedling stage, and appear disease at the seedling stage. After that, you can use Hymexazol 2000x or Root Cork 600x+
Rooting seedlings or harvesting No. 1 irrigation root treatment; can also be used to prevent disease Jian Jian Bao, the amount of 40 to 60 kg per acre.
The impact on melons This stage is mainly to control growth and increase production. During the management process, attention should be paid to temperature control and water control to prevent melons from prospering under conditions of high temperature and high humidity and causing melons to grow. At night, night temperature control should be strengthened, ventilation should be increased, and nutrient conversion and transportation should be strengthened. When applying fertilizer, pay attention to the rational application of potash fertilizer to increase production. For powdery mildew that often occurs alternately between high-temperature drought and high-temperature and high-humidity environment, medication should be started in the early stage of the disease. You can use 10% World High Water Dispersant 1000 to 1500 times or 40% DuPont Fuxing 5000 times to spray. Use once every 7 days, even for 2 or 3 times. Or the sheds can be used to kill pathogens at 42-45°C for 2 hours at noon, with obvious results.
Impact on leafy vegetables Leafy vegetables cultivated in the open air, during periods of concentrated rainfall, attention should be paid to drainage and flood prevention to prevent the accumulation of stagnant water. In addition, Cruciferous soft rot can be used 72% of agricultural streptomycin 4000 times, neophytin 4000 times or 77% can kill 600 to 800 times control. When harvesting standards are met, timely harvesting is needed to prevent rain rot and reduce commodity value.
For the prevention of constant pests
1, melon locusts: 0.6% Excision Ling 1250 ~ 1500 times liquid.
2, yellow song jumped a: 90% crystal trichlorfon 800 times spray, even the prevention of 2 or 3 times, severe field can be combined with irrigation roots.
3, diamondback moth: 5% Rui Jin special 1000 ~ 1500 times liquid or 5% Suppository EC 2000 times liquid prevention.
4, Starscream: 20% of wolfberry 3000 times fluid plus 1% of insect worm light 3000 times.
High-humidity effects: Under high humidity conditions, vegetable plants are in a state of water saturation and prone to leggy. In particular, eggplant vegetables and melon vegetables are particularly evident in this regard. After a prolonged growth of vegetable crops, cell walls become thinner, and the resilience of plant organs declines, and they are vulnerable to high temperatures, resulting in high-temperature burning of cell tissue and causing sunburn, which not only affects the growth of plants, but also results in a certain yield. influences. The moisture in the soil is in a state of saturation for a long period of time, which makes it easy for the root system to be in an oxygen-deficient state, causing the infection of roots and soil-borne diseases, leading to the emergence of "dead trees."
High-temperature effects: Continuous high-temperature weather and continuous rainy weather pose a greater threat to the vegetable seedlings cultivated in the autumn. Continuous high temperature weather not only affects the normal growth of seedlings, causing wilting growth, stagnation, etc., and the high temperature conditions tend to affect the flower bud differentiation of seedlings, resulting in a higher proportion of early flowering, fruit drop and abnormal shaped fruit, so that the benefit of the previous period is greatly reduced.
The impact on vegetable at seedling stage According to the author's understanding, taking the situation of vegetable planting in Shouguang City as an example, at present most of the vegetables are in the stage of nursery, and damping-off and blight of eggplant and melon are common. One of the symptoms of damping-off was a water-stained base at the base of the seedlings, which gradually contracted and fell to the ground. Bacterial disease often occurred when the true leaves were seen. The seedlings at the early stage of the disease wilted during the day and the stem base contracted. At present, the disease rate of these two diseases is relatively high, and other sclerotia, gray mold, downy mildew also occur to varying degrees.
The specific prevention and control methods are: First, agricultural control, renovation of field drainage facilities, clean gardens, use of sunny mornings, strengthen greenhouse ventilation, control the temperature within the shed; Second, chemical control, when the humidity is too high in rainy weather, smoke should be used Smoke method, use 20% of a smoked spirit or 20% of 100 grams of fast smoked smoked tablets in a greenhouse of 200 square meters, close the shed in the evening and smoke, and open the air the next morning. Spraying in clear weather to prevent dampness and downy mildew, choose 58% metalaxyl or 68% gold mine 600 times liquid; control damping-off, sclerotia, gray mold, use 50% procymidone 1500 times or thiophanate-methyl 1000 times.
Effects on Solanaceous Vegetables Solanaceous vegetables should be controlled after the planting, and watering should be done to make the waters hard to water and see wet, prevent excessive humidity, infect disease at the seedling stage, and appear disease at the seedling stage. After that, you can use Hymexazol 2000x or Root Cork 600x+
Rooting seedlings or harvesting No. 1 irrigation root treatment; can also be used to prevent disease Jian Jian Bao, the amount of 40 to 60 kg per acre.
The impact on melons This stage is mainly to control growth and increase production. During the management process, attention should be paid to temperature control and water control to prevent melons from prospering under conditions of high temperature and high humidity and causing melons to grow. At night, night temperature control should be strengthened, ventilation should be increased, and nutrient conversion and transportation should be strengthened. When applying fertilizer, pay attention to the rational application of potash fertilizer to increase production. For powdery mildew that often occurs alternately between high-temperature drought and high-temperature and high-humidity environment, medication should be started in the early stage of the disease. You can use 10% World High Water Dispersant 1000 to 1500 times or 40% DuPont Fuxing 5000 times to spray. Use once every 7 days, even for 2 or 3 times. Or the sheds can be used to kill pathogens at 42-45°C for 2 hours at noon, with obvious results.
Impact on leafy vegetables Leafy vegetables cultivated in the open air, during periods of concentrated rainfall, attention should be paid to drainage and flood prevention to prevent the accumulation of stagnant water. In addition, Cruciferous soft rot can be used 72% of agricultural streptomycin 4000 times, neophytin 4000 times or 77% can kill 600 to 800 times control. When harvesting standards are met, timely harvesting is needed to prevent rain rot and reduce commodity value.
For the prevention of constant pests
1, melon locusts: 0.6% Excision Ling 1250 ~ 1500 times liquid.
2, yellow song jumped a: 90% crystal trichlorfon 800 times spray, even the prevention of 2 or 3 times, severe field can be combined with irrigation roots.
3, diamondback moth: 5% Rui Jin special 1000 ~ 1500 times liquid or 5% Suppository EC 2000 times liquid prevention.
4, Starscream: 20% of wolfberry 3000 times fluid plus 1% of insect worm light 3000 times.
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