Now it's time for wheat spring spraying to control all kinds of pests and diseases, have you started spraying wheat pesticides? Which medicine do you think has the best effect?
Spring is the peak period of all kinds of pests and diseases of farmland crops, all our farmers in Central Europe, we must prevent and treat early and heavy prevention and treatment of pests and diseases on field crops, must control the reproduction and spread of field pests and diseases from the source of pests and diseases and reduce the incidence of crop pests and diseases throughout the year, we must not have the wrong pest control luck psychology of "crops do not have pests and diseases" and "headache and headache", "temporary cramming", we must have the correct understanding of "early pesticide prevention, prevention is more important than treatment".
In today's article, the agricultural technology basket will tell you about the knowledge of "one spray and three preventions" to prevent and control key pests and diseases and adverse climate hazards in spring wheat, ensure the smooth growth of wheat, and achieve yield and income increase in the later stage. Under normal circumstances, all kinds of diseases and insect pests may occur at any time from the beginning of wheat rejuvenation to wheat filling and jointing until wheat filling maturity, especially the "4 diseases and 3 insects" (such as scab, powdery mildew, wheat aphids, sucking worms, etc.) that are the most harmful to wheat growth, yield and quality, and the hazards of dry and hot air premature aging during the filling period are the objects that our farmers need to focus on prevention and control.
Because any of the "4 diseases and 3 insects" on wheat and the hazards of premature aging of dry and hot wind, when it is serious, it may lead to a large reduction in wheat yield loss, and in severe cases, it will cause more than half of the wheat yield in the whole field. The ultimate purpose of our "one spray and three preventions" for wheat in spring is to prevent and control all kinds of pests and diseases and climatic disasters on wheat, ensure the smooth and healthy growth of wheat, and successfully achieve the final stable and high yield and increase production and income.
1. What is the "one spray and three preventions" of wheat in spring? What problems are the main purposes of "one spray and three preventions" of wheat spring spraying?
Usually what we call the wheat spring spraying "one spray and three prevention", mainly aimed at the wheat growth, yield, quality of the most harmful "4 diseases and 3 insects" and "dry hot wind hazards" (weather temperature is higher than 30 degrees, the relative humidity in the field is less than 30%, the hot air moving speed is more than 2-3 m/s, can cause wheat dry hot wind hazards), that is, disease prevention, insect prevention, dry hot air prevention - the prevention and control of wheat powdery mildew, rust, scab, The four diseases of leaf blight are the three pests of red spiders, aphids and sucking insects, which are most likely to occur in wheat spring, and the adverse climate hazards of "dry and hot wind", which are most likely to occur in the middle and late stages of wheat growth (filling and maturity stage).
But the common pests and diseases of wheat in spring are not only "4 diseases and 3 insects" these 7 kinds of pests and dry hot wind hazards, so we also need to prevent and control other high-incidence and common pests and weather disasters in the spring, from this point of view, we will wheat "one spray three prevention" is wheat "one spray multiple prevention" will be more appropriate, for example, we spray wheat in the spring "one spray three prevention" focus on the prevention and control of powdery mildew, rust, scab, leaf blight and red spiders, aphids, When the seven kinds of pests and diseases of sucking insects and the hazards of climatic dry and hot wind, it is necessary to consider and prevent and treat other common pests and diseases in the wheat field, adverse climate and weather disasters, such as sheath blight, needleworm and other pests and diseases in the wheat field, and then for example, the lodging yield reduction (lodging prevention) caused by strong winds and heavy rain in the middle and late stages of wheat growth, and the yield reduction of premature yellow leaf and ear wilting (prevention of premature aging) that occurs when encountering insufficient water and fertilizer and high temperature and dry weather.
In fact, these are the key contents of our spring wheat pesticide "one spray and multiple prevention" need to be controlled, so we can not only use insecticides and fungicides when spraying wheat in spring, but also use foliar fertilizer and plant growth regulators together, only in this way can we truly achieve the purpose of ensuring production and increasing income through wheat "one spray and multiple prevention".
Second, how many times do you need to spray wheat in spring when you "spray three preventions"? How to determine the number of times your wheat needs to be sprayed in spring?
If the weather has been relatively good in the whole spring growth process of wheat, the incidence of wheat pests and diseases is relatively low, and the occurrence of wheat pests and diseases is relatively light, just to prevent wheat pests and diseases, then the time of "one spray and three preventions" spraying is mainly concentrated around mid-April and mid-May (only 1-2 times can be played);
If your wheat has more pests and diseases every spring, the wheat field and wheat pests and diseases are more serious, or your wheat has more rainy weather in the spring growth process (especially before and after the wheat flowering period), your wheat often occurs in the heading and flowering-filling maturity period, and the weather with high temperature, little rain, low humidity, dry air and hot wind blows (this situation is easy to cause wheat dry and hot wind hazards), or if you want to completely prevent and control the wheat "one spray and three preventions" in place, you need to increase the "one spray and three preventions" The number of spraying (3-4 times) is generally from mid to late February when the wheat returns to green and jointing, and continues to be beaten until the wheat is in late May to mid to early June, before the wheat fills and matures.
As for the specific time node of spraying, the fertilizer formula used in spraying, and when to spray, the agricultural technology small back basket will be explained in detail in the following content.
Because the spring climate characteristics and weather changes across the country are very different, as well as the characteristics of wheat planting varieties, the sowing time in the morning and evening, the level of water and fertilizer management in the field, the specific growth of wheat and the difference in the speed of growth, the difference in the severity of wheat diseases and pests, etc., it is impossible (and can't) for any agricultural technician, including the small back basket of agricultural technology, to tell you a specific "one spray and three preventions" that can be directly and completely copied or uniformly fixed Spraying time, can not be without understanding the actual situation of your wheat on the premise of clearly telling you how many times, but the agricultural technology basket can give you a clear time stage and wheat growth and development period that is most suitable for wheat spraying "one spray and three prevention", as for the specific time, which day to play, how many times you need to play, then you really need to combine the actual situation of your own wheat to flexibly grasp.
Second, wheat spring "one spray multi-prevention" when the effect of spraying is the best? how to choose and use the "one spray multi-prevention" spraying formula?
As mentioned above, the specific time of wheat spring spraying "one spray and multiple prevention", wheat planting areas across the country and even different wheat fields in the same place can not give a fixed specific date for spraying, and the types of pests and diseases that need to be controlled in each wheat field are also the same as a piece of land, who if you do not fully understand the actual situation of your wheat, you will directly tell you which day to fight, what kind of medicine can only be used, then this person must be an irresponsible "half-baked goods". We must not make the mistake of "one size fits all" when playing "one spray three prevention" medicine for wheat, and can not blindly follow the trend and unify the spraying with others, nor can we completely follow the formula of other people's spraying to give your wheat spray, any time and formula of spraying must be based on the actual situation of your wheat, otherwise it will happen that your wheat spraying is too early or too late, and the problem of "one spray and three prevention" after spraying pests and diseases is not good.
(1) Wheat "one spray and three preventions" only need to be sprayed 1-2 times:
(1) Spraying time: If your wheat has been growing well in the whole growth process in spring, the weather is basically normal, the water and fertilizer management can keep up, and the wheat in the wheat field has not been found to have any pests and diseases, then in this case, you only need to apply the fertilizer compound "one spray and three preventions" after the wheat is full of ears to before the flower (about mid-April) The most fundamental purpose of this medicine is to focus on the prevention of wheat scab, because as long as the continuous rainy and humid weather is encountered before and after the wheat flowering period, there is a high probability of rapid outbreak of scab, and the wheat flowering period is most likely to occur scab, the most afraid of scab, wheat before flowering to prevent scab, which is the top priority of the whole wheat spring spraying "one spray and three prevention".
Wheat flowering period "one spray and multiple prevention" When spraying to prevent and control scab, if the wheat flowering period is sunny before and after the weather, it is generally the wheat in the field sporadically when the flowers (just blooming yellow flowers) to hurry up with the spray (that is, to see the flowers on the spray), if the wheat before and after the flowering period you there is a continuous rainy and humid weather, then this situation must be in the wheat after the full ear to the flower before the spray (that is, see the ear on the spray), and wait until the wheat after the flowering period (when the white flowers bloom) and then hurry up to spray again (or so on), the interval between the two sprays is generally about 7-10 days (when there is rain, the spraying interval is shortened to about 5-7 days) is more secure。 If it rains frequently before and after the wheat flowering period, then as long as you find that there is a gap between the rain, you should hurry to the wheat field to spray the wheat twice.
(2) spraying formula: when spraying wheat during the flowering period, in addition to the need to focus on the prevention and control of scab, it is also necessary to focus on the prevention and control of rust, powdery mildew, sheath blight, leaf blight and aphids, red spiders, sucking insects and other pests and diseases that are easy to occur in wheat during this period, and at the same time, it is necessary to supplement nutrients to the foliar surface of wheat to ensure the smooth filling and fruiting of wheat in the later stage and strive for high yield and income, so at this time, when spraying "one spray and three prevention" for wheat, it is necessary to use fungicides + insecticides + foliar fertilizer + The combination of plant growth regulators (mainly brassinolides, which can be used in combination as needed) is sprayed. The formula can refer to the following: oxystrobin • tebuconazole + biphenyl • dinotefuran + potassium dihydrogen phosphate, or prochlorazine • tebuconazole + biphenyl • thiamethoxam + potassium dihydrogen phosphate, or oxystrobin • tebuconazole + pyraclosthrin + biphenyl • thiamethoxam + potassium dihydrogen phosphate, pyraclostrobin azole ether • tebuconazole + cyhalothrin • imidacloprid + potassium dihydrogen phosphate.
In the prevention and control of gibberella and other diseases at the heading and flowering stage, in addition to the above-mentioned oximmetrobin, tebuconazole, prochlorazine, tebuconazole, and azole ether, tebuconazole, other fungicides containing tebuconazole can also be used to prevent and control common diseases such as wheat scab.
(2) Wheat "one spray and three prevention" needs to be sprayed 3-4 times
(1) Spraying time: If your area is located in the spring from March to May, there is more continuous rain, low temperature and humid weather, or the wheat where you are located has begun to have serious pests and diseases around February and March every year, or your wheat has poor resistance to diseases and pests in the spring, or the wheat where your wheat is located often has dry and hot winds during the wheat filling and maturity period in mid to late May, so in order to ensure that your wheat can grow smoothly and develop healthily, In this case, you must apply 1-2 times of medicine in the wheat heading and flowering period, and you must also apply more medicine in the wheat tillering and jointing period and wheat filling and maturity period respectively to carry out "one spray and multiple prevention", focusing on insect prevention, disease prevention, dry and hot air prevention, premature aging, and unnecessary yield loss.
(2) spraying formula: wheat in the tillering and jointing period of spraying pesticides to prevent diseases and insects, generally to prevent and control aphids, red spiders, rust, powdery mildew, stem base rot in the wheat field as the focus, while preventing and controlling other common pests and diseases in early spring and promote wheat tillering jointing, developed roots, the formation of strong seedlings, the time of spraying is generally concentrated in the end of February to mid-March around the wheat back to green jointing period (the temperature should reach more than 10-15 degrees before spraying), at this time "one spray three prevention" combination formula you can refer to the following: biphenyl • thiamethoxam + hexaconazole + potassium dihydrogen phosphate, or cyhalothrin • imidacloprid + tebuconazole • pyraclosthrin + potassium dibasic phosphate.
In addition to the above-mentioned drug formula, when we apply pesticides at the wheat tillering and jointing stage to control pests and diseases, fungicides can also use fenanin, enaconazole, triazolone, propiconazole, fluconazole, tebuconazole, mycloconazole, pyraclosthrin, benzoconazole, oxime • tebuconazole, azole ether • fluconazole, prothioconazole • tebuconazole, tebuconazole • azoxystrobin, benz • azoxystrobin, tebuconazole • prochlorazole, etc., insecticides can also use thiamethoxam, imidacloprid, pymetrozine, acetamiprid, flufenamide, Ethoxamethrin, cypermethrin, bifenthrin, thiamethranid, chlorofluorine, imidacloprid, fludimidoxam, bifenthrin thiamethoxam, bifenylclothianidin, emamectin perchlorofluoride, etc., if your wheat has the problem of weak seedlings and poor growth in early spring, you can add urea water and brassinolide to spray together to promote seedlings and seedlings.
When wheat is sprayed and sprayed at the filling stage after heading, it is necessary to prevent and control the damage of sucking insects and dry and hot air, supplemented by the prevention and control of aphids, scab, leaf blight, etc., so as to ensure that wheat is increased in the final growth stage to increase nutrition to promote grain filling and weight gain, and to ensure that wheat ears and grains are not reduced due to the occurrence of pests and diseases and premature aging of dry and hot air. The last spraying of wheat "one spray and three preventions", mainly concentrated in the middle of May around the filling period until 1-2 weeks before the wheat matures, at this time the formula of spraying is mainly to prevent and control the damage of dry and hot air potassium dihydrogen phosphate (playing potassium dihydrogen phosphate is the best way to prevent wheat from drying up and drying up due to hot and dry air) and the insecticide for the prevention and control of the damage of the sucking worm, the combination formula of the drug can be flufeniliprole • thiamethoxam + potassium dihydrogen phosphate + tebuconazole • prochloraz + brassinolide, or bifenthrin thiamethoxam +Potassium monobasic phosphate + pyraclostrobin • tebuconazole + brassinolide can be used as a combination, or potassium monobasic phosphate + cyhalothrin • thiamethoxam + tebuconazole • prochloraz + brassinolide.
If your wheat has defertilization, yellow leaves, premature senescence and other phenomena during the grain filling period of wheat ears, then when playing the last "one spray and three prevention" drugs, it is recommended to add a small amount of urea (about 50 grams) to the small back basket of agricultural technology, which can play a better role in ensuring and stabilizing wheat yield.
Finally, the agricultural technology small back basket provides you with "one spray and three preventions" to provide several key matters for attention:
(1) Tebuconazole can be used before and after wheat flowering, but it must not be sprayed and used during the full flowering period of wheat, and tebuconazole should not be used continuously and frequently, otherwise it will cause wheat flower burning and affect pollination and fruiting;
(2) When spraying wheat in spring with "one spray and three preventions", you must not use the same drug formula every time, and it is recommended to change to a different drug combination formula every time you spray it;
(3) When wheat is sprayed to prevent and control scab during the heading and flowering period, if it encounters continuous rainy and humid weather, it is necessary to pay attention to early spraying and early prevention, and it must be sprayed once before the rain and after the rain (the amount of medicine is halved after the rain);
(4) The above agricultural technology small back basket mentioned that this to these "one spray three prevention" drugs (including fungicides, insecticides, foliar fertilizers, regulators, etc.), we can generally buy in the pesticide store, we mainly look at the effective drug ingredients marked on the outer packaging bag of the product (too many pesticide brands, mixed quality, try to buy well-known products from large factories), do not fully believe the pesticide shop owner's recommendation and pesticide products that have nothing to do with your wheat pest control.
That's all for today!
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