Integrated control method for asparagus stem blight in asparagus planting technology
Asparagus stem blight is a common disease in the cultivation of asparagus, and it is also a major disease that harms asparagus and a headache in the management of bamboo shoots. The following comprehensive management and prevention methods are summarized as follows: one dry and one wet, one more and one less, one high and one low, one morning and one night, one up, one after the other. Follow the twelve points to make the following introduction:
Dry and wet:
"One dry" is to keep the stem (spring leaves, autumn stems, change stems) during the surface should be as dry as possible, this is also the saying that we usually say that the rain does not leave the mother stem. Before the stem is placed, the fertilizer is applied and the water is poured. After the stem is left, the water is not watered for 40 days. In the case of rain, the soil is ploughed in time to reduce the humidity in the field. Generally, after 40 days of stem retention, the plants are not easily infected by the bacteria as they age. As the asparagus roots are drought-tolerant, as long as the fertilizer is applied before the stems and the water is poured, the demand for fertilizer and water in the asparagus within 40 days can be satisfied.
“One wet†is to lightly water the water before the stems are collected, watering it frequently, pouring water once every 15 days, keeping the soil moist as much as possible, and improving the yield and quality of asparagus. Asparagus is drought-tolerant and avoids stagnant water in the field.
More than one:
“One more†means applying potassium fertilizer before leaving the stem, which can effectively alleviate the damage of stem blight. Potassium fertilizer should use "potassium chloride", which has the function of promoting plant growth and improving the body's disease resistance.
“One less†is less nitrogen fertilizer before leaving the stem. Nitrogen fertilizer can promote the leafy leaves of the plants and make the straws tender, and the bacteria are easy to invade. If the excessive application of nitrogen fertilizer in the early stage will cause the disease to worsen. Before the stem is combined with watering and fertilization, generally apply 25 kg of compound fertilizer (15% of NPK) per mu, plus 10 kg of potassium chloride; after 40 days of staying stems, apply 25 kg of compound fertilizer per acre, plus potassium chloride. 10 kg, urea 15 kg.
A number of plot surveys and experiments have shown that the application of organic fertilizers and trace elements can effectively promote the robust development of asparagus and reduce the occurrence of stem blight. The micro-fertilizer can be supplemented by foliar application.
One high and one low:
“One high†is the height of the ridge during the period of staying stems, generally 25-30 cm. The high ridge can improve the ventilation conditions of the bamboo shoots. After the rain or after watering, the ridge top can quickly become dry, and the bacteria are not easy to germinate. Dyeing plants. When watering, the water surface does not exceed 2/3 of the ridge height, so that the surface of the upper 1/3 of the ridge is kept dry.
“One low†is that the ridges are low during spring bamboo shoots, and the ridge height is about 15 cm. If the ridge is too high during the bamboo shoots, the proportion of the white roots of the tender stems will increase, which will affect the yield and quality, while the lower ridges will also ensure that the whole ridges will be wetted when watering, which will facilitate the spores and weaken the bacteria. . Because the asparagus shoots grow and then is cut, the spores flying out of the host lacks the host, even if it is germinated, it is not harmful.
One morning and one night:
"Early morning" is to take the medicine earlier, and take the medicine 3 days before the stem. In the case of chemical control, ground sterilization can be carried out with lower cost agents such as copper sulphate and bacteriostatic net. Spraying plants can be rotated with carbendazim, mancozeb, chlorothalonil, difenoconazole, amishida and other pharmaceutical agents. Apply. Can also be used together according to the actual situation.
"One night" is the late stem, and the stems are less in the summer. After the rainy season in mid-August, the stems are concentrated. The choice of even the right time to stay in the stem, the prevention of stem blight is better. However, it should be determined according to the growing time of the region. It is not easy to stay late, otherwise it will affect the yield of asparagus in the next year. In general, the number of days of maternal growth can meet more than 100 days.
One up:
“One on the top†is to spray the upper stems and leaves of the plant in a comprehensive manner when controlling the disease, so as to achieve uniform and transparent.
"A little" not only the fine control of the stems and leaves of asparagus plants, but also the stalks and base of the asparagus plants, so that the whole plant can be sprayed evenly, leaving no dead ends, so that the whole plant is protected. , do not give the bacteria a chance to take advantage of.
One after the other:
"One before" is a spray of medicine before watering. "After" is a spray of medicine in time after rain to prevent germs from germination due to excessive humidity.
There are many kinds of medicines for controlling stem blight. The best fungicides are selected through investigation and experimental comparison: 10% difenoconazole water? Granules 60g per acre, 64% cream. Manganese zinc wettable powder 250 grams per mu, 75% chlorothalonil wettable powder 150 grams per acre, 50% different bacteria urea wettable powder 100 grams per acre, above 100 pounds of water spray. Another 38% of the cream of copper citrate is 1200-1500 times.
The article source "Beijing Yinong Gaoke Agricultural Technology Co., Ltd.", please contact the company's technical department for technical advice.
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