The middle and late wheat should be mixed three times

Since April, wheat has entered the critical phase of nutritional and reproductive growth, known as the panicle differentiation stage. During this period, the crop requires significant amounts of water and nutrients, making it a crucial time for fertilization. However, this is also when wheat becomes most vulnerable to diseases such as powdery mildew, sheath blight, and head blight, as well as pests like locusts, wheat spiders, and midges. At the same time, root activity starts to decline, leading to an increase in yellow roots and a reduction in white roots, which negatively affects nutrient and water uptake. To address these challenges, it's essential to apply fertilizer and water during the panicle differentiation period, especially between mid-April and early May—when the wheat is at its peak growth stage. Additionally, the early stages of grain filling after flowering (mid to early May) are also important for applying the final rounds of nutrients. It’s recommended to divide the mid-to-late season fertilization into three batches to ensure optimal absorption and effectiveness. Using a combined spray of medicinal and fertilizer agents offers several advantages. First, it saves costs by reducing the number of sprays and the amount of chemicals used. By combining fungicides, insecticides, and foliar fertilizers in one application, farmers can cut down on both labor and material expenses. On average, each acre can save over 20 yuan in costs related to spraying, fertilizing, and labor. Second, this method improves control efficiency. The combined application enhances the concentration and interaction of the active ingredients, allowing them to work synergistically. This not only boosts disease and pest control but also increases yield by preventing premature aging and promoting healthier growth. Third, it significantly boosts production and profit. Field observations show that wheat treated with three rounds of mid-to-late season sprays develops stronger stalks, thicker leaves, larger grains, and higher yields. On average, such wheat experiences more than a 15% increase in yield and over 120 yuan per mu in additional income. In terms of specific products, the fungicides commonly used in the three sprays include Jinggangmycin, Rhizoma et Radix (combined with Fusarium cerealis), Triadimefon, Ethyl Allicin, Enoxazole, Myclobutanil, Carbendazim, Chlorpheniramine, Thiram, and their combinations. The first spray primarily targets sheath blight, powdery mildew, and rust, while the second and third sprays focus on controlling powdery mildew and scab. For insecticides, options like Cypermethrin, Omethoate, Cyhalothrin, Deltamethrin, Fenvalerate, Phoxim, Chlorpyrifos, Acephate, Imidacloprid, Avermectin, and Methotrexate are commonly used. However, high-toxicity and high-residue pesticides like Methamidophos must be strictly avoided to ensure environmental safety and food quality. Regulators or foliar fertilizers play a key role in enhancing root development, nutrient absorption, and overall plant health. The first spray may include rooting agents like Sodium Phenolate, while the second can incorporate amino acids, humic acid, and trace elements to support leaf function. The third spray might use Potassium Dihydrogen Phosphate, Cell Activator, and Active Enzyme to boost substance transport and prevent early aging. To further supplement nitrogen levels, about 150 grams of urea can be added to each spray. This comprehensive approach ensures that wheat receives balanced nutrition, strong disease resistance, and maximum yield potential throughout its growth cycle.

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