Little knowledge of pesticide use

Today I brought you the ingredient properties and treatment mechanisms of herbicides and bactericides.
I hope it can be helpful to everyone! Herbicides Butachlor (Marxiete, Benachlor, Mediachlor) selective pre-emergence; absorption by young shoots and roots, effective on weeds before emergence and two-leaf stage; no effect on subsequent crops; Gramineous weeds, certain Cyperaceae weeds and some broad-leaved weeds; melon and field weeds can be applied 1 to 2 days before seedling or transplanting; it has poor control effect on cattle chickweed
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Metolachlor (Dur, Durr, Methoxachlor, Dicotyledon) selective pre-emergence soil treatment agent; coleoptile (monocotyledon) or sprout, young root (dicotyledon) absorption; peanut, soybean Weeding of dryland crops such as vegetables, corn, sugarcane, melon and other dryland crops; soil moisture must be maintained after the application; pendimethalin (shitianbu, Chuoweitong, pendimethalin) inhibits the division of meristem cells
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Does not affect the germination of weed seeds
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In the process of weed seed germination, the sprouts, stems and roots absorb chemicals and take effect; soybeans, corn, cotton, tobacco, peanuts and various vegetables and orchards prevent and control annual gramineous weeds and certain broad-leaved weeds; The effect of controlling monocotyledonous weeds is better than that of dicotyledonous weeds; watering first and then spraying; Jingwenshade (flufenoxypyr, flufenoxypyr) systemic conductive selective stem and leaf treatment agent ;Grass weeds; stems and leaves are absorbed and hydrolyzed into acid; broad-leaved crops; gramineous weeds; slow action speed; lasting period of up to 45 days; good weeding effect when humidity is high; efficient cover grass Energy (high-efficiency fluoxyfop-ethyl, jingcaoneng, high-efficiency pyridoxine) systemic and conductive selective herbicide; stem and leaf treatment; long residual effect; effective in 1 week in summer and 20 days in winter; broad-leaved crops Field; gramineous weeds; ineffective to broadleaf weeds and cyperaceae weeds; stop medication 60 days before harvest; Jing grass (quizalofop-ethyl, grass gram) systemic conduction selective herbicide; 2 The day is when the new leaves turn yellow; even if it rains for 1 to 2 hours, the weeding effect will not be affected; broad-leaved crops; gramineous weeds; melons, soybeans, peanuts and vegetable fields; against Cyperaceae weeds and broad-leaved weeds Invalid grass; Puma, Puma, and oxoxaprop-p-ethyl selective systemic post-emergence herbicide; flexible application period (weeds from one-leaf stage to tiller stage), safe for crops, and no residue on subsequent crops; melon Control of grass weeds in species, vegetables, ornamental plants, orchards, tea gardens, and medicinal plants; Cao Cao Dan (Mia Cao Wan, Cao Cao Dan, Weeding Weeds) systemic conduction selective herbicide; sprouts And root absorption; after the seeds germinate, the medicament can be absorbed; the effect of using barnyardgrass before the two-leaf stage is significant, but the effect is significantly reduced at the three-leaf stage; weeding in rice, vegetables, barley, rape, and milk vetch
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The melon field is generally used before the seedlings after sowing; the residues and medicinal properties of herbicides will harm the natural ecology of soil microorganisms, so herbicides should be used when necessary, otherwise the soil will be destroyed and the dealer will be more prone to pests and diseases.
Spectrum; downy mildew, infestation and anthracnose pathogens, etc.
; medication at the initial stage of onset, short duration; melon damping-off, wilt, angular leaf spot, fusarium wilt, anthracnose, downy mildew, etc.
Diseases; anthracnose, blight, downy mildew, leaf spot, black spot, etc.
of mancozeb melons; avoid medication at high temperature; do not need to respray after rain; broad spectrum of thiophanate-methyl; protection and treatment; ash Mildew, powdery mildew, anthracnose, brown spot, leaf mold, etc.
; irrigate roots to prevent fusarium wilt; can be mixed with lime sulfur mixture and other alkaline pesticides, but cannot be mixed with copper preparations, or used immediately before and after.
Can not be used alone for a long time; stop using it 14 days before harvest; sweet potato, peach; rice spraying from the young ear formation stage to the booting stage can prevent rice blast, sheath blight, etc.
; rape can prevent sclerotinia sclerotia when it is blooming; Pod stage spray to prevent gray spot disease; chlorothalonil broad-spectrum; preventive effect, no systemic conduction effect; not easy to be washed by rain, long residual effect; tomato, mushroom, strawberry, tea tree, peach, tobacco, to some apples, Grape varieties have phytotoxicity; prevent potato late blight, early blight and gray mold before sealing; prevent grape anthracnose, powdery mildew, and fruit rot by spraying at 2 weeks after flowering; prevent peach brown rot and scab The disease is at the stage of gestation buds and when the flowers are falling, and the disease is usually when the flowers are falling; the control of strawberry gray mold, leaf blight, leaf scorch and powdery mildew is usually sprayed once at the beginning, middle and late stages of flowering; nail cream The spirits are transmitted up and down to protect and treat; the residual effect period is 10 to 14 days; melons Downy mildew, Phytophthora and Pythium; carbendazim broad-spectrum, protection and treatment; effective against many ascomycetes and deuteromycetes, preventing melons Fusarium wilt, vine blight, anthracnose, powdery mildew, downy mildew, leaf spot, etc; Prevention and treatment of sheath blight; Procymidone protection and treatment; long-lasting effect and can prevent the development of disease spots; leaf and root absorption; specific effects on diseases caused by Botrytis and Sclerotinia, such as in high humidity Botrytis cinerea, sclerotinia sclerotiorum and pathogens resistant to thiophanate-methyl and carbendazim that occur under low temperature conditions have specific effects; not suitable for mixing with organophosphorus pesticides; under conditions of seedlings, weak seedlings, high temperature and high humidity When spraying, pay attention to the application concentration to avoid phytotoxicity; strawberries, peaches and cherries; Iprodione broad-spectrum, contact type, protection and treatment, root absorption has a therapeutic effect; Botrytis, Candida, Sclerotinia, cross Alternaria et al
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In addition, seed treatment has good activity against many seed-borne and soil-borne bacterial diseases of cereal grasses
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When used alone, it has a good control effect on spot disease, mold rot, wilt, leaf blight, leaf spot, flax leaf spot and glume blight.
It can be used in combination with wilhelmine or carbendazim, and it has a good effect on the black Ear disease and smut have excellent control effects; Hymexazol is soil disinfection and sterilization; it can be absorbed by roots and move within the root system, and metabolizes in the plant to produce two glycosides, which can improve physiological activity; caused by Pythium, Fusarium, etc.
Soil-borne diseases such as damping-off, standing wilt, fusarium wilt, sclerotium, etc.
; wet or stuffy seeds are prone to phytotoxicity; the dosage should be strictly controlled to prevent the growth of crops; tebuconazole broad-spectrum triazole Species; promote growth and increase yield; sorghum, tea; powdery mildew, stalk rust fungus, ceratocystis, sclerotium, and ascosporum oxaxyl have high control effect on downy mildew pathogens, Long validity period; tobacco; concurrent treatment of multiple secondary diseases such as brown spot, black rot and so on
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Take a look at the label first, and check carefully to be deceived
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The label is intact and undamaged, and the handwriting is clear and incomplete; the name of the pesticide must be recognized, and the active ingredient must be indicated
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Look at the three certificates carefully before buying, the number codes are stipulated; National Ministry of Agriculture drug inspection, there is no shortage of domestic pesticides; Imported pesticides are different, only the pesticide registration number
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The pesticide category depends on the color band, red, yellow, black and green are distinguished; black sterilizes and kills insects, green field controls weeds, yellow regulates growth and promotes growth.
Don't forget the purpose of the ribbon
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If the label is wrong or changed, please be cautious when purchasing
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Second, look at the appearance of the product, grasp the characteristics and debate carefully
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Suspended water powder particles of smoke agents have different appearances
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Appearance color shape should be known, and the shape should not be confused
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Emulsifiable concentrate, transparent oily liquid, turbid and unqualified
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The water is creamy white or creamy, and its appearance is opaque
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If the liquid is stratified or frozen, the product has deteriorated and cannot be bought
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Suspended milky white or light color, fluid and viscous-like suspension; easy precipitation is the characteristic, long-term storage shape changes; the lower layer becomes thicker and the upper layer becomes thinner, and the condensed layer settles on the bottom of the bottle; if shaken, if it can be suspended, the product still does not expire; It is difficult to recover from shaking and can not be used to reduce the effect
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The aqua is semi-permeable or transparent, and does not contain a suspension.
The liquid is uniform; Precipitation can be dissolved when stored at low temperature; it can be dissolved when the temperature rises; Qualified products have this state, and the quality of use will not affect; The precipitation does not dissolve at elevated temperature
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Quality is hard to maintain
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Wettable powder is fine powder, if it has such a good quality; if the powder is coarse-grained, the quality has deteriorated after the expiration date
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The granules are divided into different sizes, and the qualified products are fine; the granules are broken to produce powder, and the waste medicine is sprayed; it damages the body and the environment, and the product quality is difficult to guarantee
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Third, look at the properties of pesticides, and determine the quality of active ingredients
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The quality standard lies in the composition, which is difficult for ordinary users to identify
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Technical testing is inconvenient, and the efficacy of the drug can be tested in the field; if the standard-definition object and dosage are different from the control effect; the difference is too large and the effect is not obvious, and the content of the ingredients is suspected to be reduced
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Physical properties also need to be checked, and various dosage forms are tested in water
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Emulsifiable concentrates depend on emulsification and water testing is feasible; good emulsifiable concentrates dissolve in water and immediately diffuse into clouds; emulsifiable concentrates do not appear on the liquid surface, and oil droplets are easy to flocculate; it is difficult to spread when dripped into water, and coarse oil beads float on the liquid surface; The beads are easy to polymerize, and the stability of the liquid medicine is not reliable
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Wettable powder suspension, the wet spreading liquid is prepared first; first, pick the dry leaves and pinch the surface of the petiole insert; watch again after a few seconds, and then judge based on the liquid spots; if the liquid leaves are full, the wet spreading performance is praised; If the liquid leaves do not stick, it means that the medicine is not wet
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The fineness of the powder also depends on the quality of the inspection; the higher the fineness, the better the quality, and there are many determination methods; the scientific determination requires sieving, and the simple method is pinched by hand; the thumb and forefinger pinch the powder and rub each other slowly and twist; Twist After the powder is finished, look for the feeling, the smaller the fineness, the better the quality
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The smoke agent is easy to absorb moisture when stored, and the hand-squeezed packaging is indispensable; the packaging is soft and good, and it is not available for moisture absorption
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To sum up, when buying pesticides, you must look at it three times.
Use pesticides and keep them well; if the temperature is too high or too low, the humidity is too high and the sun shines; if the fertilizers and pesticides are mixed up, shortening the period is difficult to guarantee
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Article source: Public welfare plant protection, please indicate the source for reprinting