Ginkgo biloba, also known as ginkgo, Gongsun tree, is the deciduous tree of Ginkgo biloba in Ginkgoaceae. Hi sunshine, avoid yin, hi warm and humid climate, can be cold-resistant, avoid blisters, deep-rooted, strong sprouting power, hi fertile loose and well-drained sandy soil, the author of the Shanghai Hengda Garden Development Co., Ltd. to winter A total of 523 large ginkgo trees with breast diameters of more than 30 cm and heights of 12 meters or more were transplanted.
From late March to April 2001, the leaves were gradually displayed. From the end of May to the beginning of June, more than half of the leaves of Ginkgo biloba were shrunk to less than 1 cm, and then they fell off. The growth was extremely debilitating and there were serious problems with survival. In mid-June, the growing trend turned sharply. Due to the declining growth, leaf pests such as leaf roller moths and leaf blight were attacked by other insects, affecting other tree species.
After careful observation, dissection, verification, and research, the reason is that the pests and diseases were carried during the arrival of the tree. At the beginning, some trees were scattered in the soil, the roots were cut short, the soil was not compacted when planted, the soil ball was small, the pile height was buried, and the technical guidance was given. Poor supervision and so on.
After careful consideration, the possibility of applying borax was ruled out, the formulation of comprehensive soil was amended, and comprehensive measures were adopted to verify the feasibility of applying the retort:
1: First, cut it to reduce the consumption of water and nutrients and stimulate the vigor of trees;
2: Use 80% of dichlorvos emulsifiable concentrate, 40% of oxidized 800ml solution of kerukole EC, spray three times in a row to kill leaf-eating pest leaf roller moth;
3: Use 50% carbendazim WP 800 times to control ginkgo leaf blight, 3 times in succession;
4: The root of the neck is earthy to breathe, and the earth is soiled to protect the earth. It is good for storing water and nutrients. Ginkgo is a deep-rooted tree species and must be planted in shallow depth.
5: Foliar spray ABT rooting powder-based hormones and nutrient solution, activated by the outer screen, that is 50ppm concentration of ABT3 and 200ppm KH2PO4 mixture;
6: Utilize urea fertilizer in rainy days to increase nutrient supply;
7: Critically ill trees, large doses of infusion to promote, and strive to rescue. More than 40 strains of Ginkgo biloba were not planted until mid-July and they were dying. Take a deep hole from the neck to the medullary heart, enter the 200ppm concentration of ABT3 and 1000ppm concentration of KH2PO4 mixture. After half a month, all the leaves are displayed.
Due to accurate judgments and proper measures, through the efforts of the past two months, Ginkgo has basically turned a corner to safety, demonstrated vitality, enhanced its tree vigor, and improved its ability to withstand natural disasters such as high temperature and drought. The survival rate of Ginkgo biloba is expected to exceed 98%.
Sapling rot of seedlings: Diseases generally occur during the rainy season, with higher soil temperatures in summer, burns on the stems of seedlings, and invasion of bacteria from wounds. Low-lying, stagnant water, easy to disease. At the time of onset, brown plaques appeared at the base of the seedlings, and thereafter the phloem rotted and the seedlings died.
Control methods: The main prevention. Summer shading or grass cover reduces soil temperature. Timely removal of diseased seedlings, combined with the spraying of bactericides such as carbendazim, Bordeaux mixture, ferrous sulfate, etc., have good results.
Other insect pests are green-green beetles, long-horned beetles, and tussahs.
From late March to April 2001, the leaves were gradually displayed. From the end of May to the beginning of June, more than half of the leaves of Ginkgo biloba were shrunk to less than 1 cm, and then they fell off. The growth was extremely debilitating and there were serious problems with survival. In mid-June, the growing trend turned sharply. Due to the declining growth, leaf pests such as leaf roller moths and leaf blight were attacked by other insects, affecting other tree species.
After careful observation, dissection, verification, and research, the reason is that the pests and diseases were carried during the arrival of the tree. At the beginning, some trees were scattered in the soil, the roots were cut short, the soil was not compacted when planted, the soil ball was small, the pile height was buried, and the technical guidance was given. Poor supervision and so on.
After careful consideration, the possibility of applying borax was ruled out, the formulation of comprehensive soil was amended, and comprehensive measures were adopted to verify the feasibility of applying the retort:
1: First, cut it to reduce the consumption of water and nutrients and stimulate the vigor of trees;
2: Use 80% of dichlorvos emulsifiable concentrate, 40% of oxidized 800ml solution of kerukole EC, spray three times in a row to kill leaf-eating pest leaf roller moth;
3: Use 50% carbendazim WP 800 times to control ginkgo leaf blight, 3 times in succession;
4: The root of the neck is earthy to breathe, and the earth is soiled to protect the earth. It is good for storing water and nutrients. Ginkgo is a deep-rooted tree species and must be planted in shallow depth.
5: Foliar spray ABT rooting powder-based hormones and nutrient solution, activated by the outer screen, that is 50ppm concentration of ABT3 and 200ppm KH2PO4 mixture;
6: Utilize urea fertilizer in rainy days to increase nutrient supply;
7: Critically ill trees, large doses of infusion to promote, and strive to rescue. More than 40 strains of Ginkgo biloba were not planted until mid-July and they were dying. Take a deep hole from the neck to the medullary heart, enter the 200ppm concentration of ABT3 and 1000ppm concentration of KH2PO4 mixture. After half a month, all the leaves are displayed.
Due to accurate judgments and proper measures, through the efforts of the past two months, Ginkgo has basically turned a corner to safety, demonstrated vitality, enhanced its tree vigor, and improved its ability to withstand natural disasters such as high temperature and drought. The survival rate of Ginkgo biloba is expected to exceed 98%.
Sapling rot of seedlings: Diseases generally occur during the rainy season, with higher soil temperatures in summer, burns on the stems of seedlings, and invasion of bacteria from wounds. Low-lying, stagnant water, easy to disease. At the time of onset, brown plaques appeared at the base of the seedlings, and thereafter the phloem rotted and the seedlings died.
Control methods: The main prevention. Summer shading or grass cover reduces soil temperature. Timely removal of diseased seedlings, combined with the spraying of bactericides such as carbendazim, Bordeaux mixture, ferrous sulfate, etc., have good results.
Other insect pests are green-green beetles, long-horned beetles, and tussahs.
Thiophanate-methyl
It is a kind of broad-spectrum hypotoxic fungicide with internal absorption, prevention and treatment.
It can effectively control the disease of many crops, such as wheat, rice, sweet potato, etc.
It is mainly used for leaf spray and can also be used for soil treatment
1, vegetables, disease prevention and control Prevention and control of cucumber powdery mildew, anthrax, eggplant, onion, celery, tomatoes, Beans and other mould, anthrax, sclerotium disease, available 50% wettable powder 1000-1500 times liquid, and at the beginning of the disease, spray once every 7 to 10 days, continuous spray 3-4 times;Prevention and treatment of lettuce gray mold, sclerotinia, available 50% wettable powder 700 times liquid spray.
Methyl sulfur bacteria spirit
2, disease prevention and control of flowers For dahlia flower rot, Chinese rose leaf spot, hitom resistant, clivia leaf spot have certain control effect.In general, use per acre 50% wettable powder 83-125 grams, the conventional water spray, spray a total of 3-5 times.
3, fruit tree diseases prevention and control
Apple ring spot, anthracnose available 50% wettable powder 400-600 times liquid spray, spray once every 10 days.
Grape leaf spot, anthracnose, mould, peach brown rot, etc., can be used 50% wettable powder 600-800 times liquid spray;
Citrus storage of penicillium, green mildew, immediately after the citrus picking with 40% rubber suspension agent 400-600 times liquid, dip the fruit 2-3 minutes, remove to frame up to dry.
4, wheat and barley diseases prevention and control Of wheat and barley smut, available 50% wettable powder 200 grams of 4 kg seed 100 kg of water, and then the tightness of 6 hours;The high 3, beginning flowering plants, 5 to 7 days after spraying the second time available per acre 50% wettable powder 75-100 grams.
5, other crop disease prevention and control of tobacco, mulberry powdery mildew, available 50% wettable powder 300-400 mg/kg of liquid spray;Disease ChengFa periods, the peanut leaf spot, can use 50% wettable powder 200-250 mg/kg liquid spraying, interval of 2 weeks, spray 3 times;Sweet potato black rot, available 50% wettable powder 500-1000 mg/kg seed potato solution for 10 minutes.
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