Following the Awakening of Insects, winter wheat has already entered the green-up and jointing stages. Field visits and surveys reveal that farmers face numerous questions and uncertainties regarding wheat growth and field operations during this critical period, leaving them with many unanswered concerns.
For example, some wheat seedlings exhibit weak growth, while others have yellowing leaves. How can yellowing seedlings be revived most quickly? In addition, some fields are heavily infested with weeds—what precautions should be taken when applying herbicides? Furthermore, during the green-up and jointing stages, certain diseases—such as sheath blight and powdery mildew—begin to spread. How should fungicides be selected to manage these ailments? To address these questions and concerns that arise during wheat’s green-up and jointing phases, China Agricultural University is here to help clarify them for you.
01 The wheat seedlings have turned yellow.
Wheat leaves turning yellow may be due to the following factors: 1. Excessive soil moisture and overwatering, particularly in low-lying areas, combined with soil salinization, which impairs root nutrient uptake and causes chlorosis; ensure timely drainage. 2. Poor root development leading to impaired nutrient absorption; apply supplemental fertilizer promptly. 3. Micronutrient deficiencies—most often resulting from inadequate root uptake, which manifests as deficiency symptoms in the aboveground foliage, causing yellowing. Additionally, cold‑induced frost damage can also contribute.
In light of the reasons mentioned above, we’d like to recommend a product here. Agricultural University fertilizer—ultra-fast nitrate potassium , specifically addressing the issue of yellowing leaves during the wheat green-up stage; it contains Nitrate nitrogen, ammonium nitrogen, amide nitrogen, and total nitrogen combined It rapidly replenishes the nutrients wheat needs, helping to restore normal leaf color. Additionally, it contains humic acid, which raises soil temperature, enhances leaf photosynthesis, and promotes the production of more organic matter, thereby meeting wheat’s nutritional requirements during green-up and tillering.
1. Apply by flushing or drip irrigation: 1 bucket per mu per application.
2. Foliar spray, diluted 500–800 times.
02 Precautions for Applying Herbicides
As temperatures rise, wheat enters the green-up and jointing stages, and weeds in the fields begin to sprout and grow vigorously, competing with the wheat for nutrients. Therefore, applying herbicides is an essential farming practice for many wheat farmers. Given the wide variety of weed species in wheat fields, the following points should be kept in mind when using herbicides:
Typically, apply the treatment from mid-February to mid-March, when wheat seedlings are green and before tillering begins. Do not spray after tillering, as this can cause phytotoxicity—severe cases may reduce yield—and because weeds that have grown too large become less responsive to the herbicide. Choose a clear, windless or lightly breezy day, preferably after 10 a.m. and before 3 p.m.
Maintain soil moisture at around 50% to optimize herbicide efficacy; avoid rainfall or other wet conditions after application to prevent reduced effectiveness.
To ensure efficacy and prevent phytotoxicity, select a relatively stable temperature—daytime temperatures above 10°C—and avoid significant temperature fluctuations, such as widespread cooling, within one week of application.
Select or combine herbicides strategically based on the weed species. In addition to chemical treatments, you can also apply foliar fertilizers such as Heizefeng or Anjiali Leaf, which contain macronutrients, micronutrients, humic acids, and other beneficial components to promote wheat growth and help prevent nutrient deficiencies later in the season.
03 Disease prevention
From the late green-up stage to the early jointing stage—typically around the time of jointing—high temperatures and high humidity create favorable conditions for the development of wheat sheath blight and powdery mildew. Generally in mid-to-late March, to prevent these diseases, recommended fungicides include Jinggangmycin, Thiophanate‑methyl, Tebuconazole, Hexaconazole, Epoxiconazole, Flusilazole, Propiconazole, and Benomyl‑Propiconazole, used in combination with… Agricultural University’s Heize Feng or Anjiali Ye , enhancing leaf stress tolerance and strengthening plant vigor, thereby laying a solid foundation for panicle initiation and grain filling in the later stages.
Instructions for use: Apply as a foliar spray, diluted 600–800 times.
04 Alleviate phytotoxicity
When applying pesticides to wheat, some farmers struggle to maintain the proper concentration, often resulting in phytotoxicity—white spots on the leaves that appear across entire fields. To address this issue, it is recommended to spray with brassinolide plus… The eldest son’s sprout from the Agricultural University , enhances photosynthesis, promotes the growth of damaged wheat seedlings, increases the number of productive tillers, stimulates root development, boosts seedling vigor and stress tolerance, and reduces yield losses.
Instructions for use:
Foliar spray,
Dilute 800–1000 times.
