During the harvesting period of mulberry strawberries, many growers tend to focus only on early-stage management while neglecting the importance of later care. This oversight can lead to reduced secondary fruit yield, lower quality, and ultimately, a negative impact on their income. The following issues are commonly encountered during the late growth stages of mulberry strawberries. Here's a detailed breakdown from the **Chinese Pesticide Network**, aimed at helping growers improve their practices.
First, water stress is a major concern in mid-June when temperatures rise, wind increases, and dry hot winds become more frequent. Strawberry plants experience high evaporation rates, and soil moisture is quickly lost. This can cause water shortages that affect flowering, fruit development, and overall plant health.
**Solution:** Based on years of practical experience, it’s recommended to use flood irrigation under the mulch film. Before flooding, remove the film between the rows, use wooden sticks to lift both ends of the plastic sheet, and let the water flow into the furrow. After watering, allow the moisture to seep into the soil before replacing the mulch. This technique helps reduce soil compaction caused by irrigation and ensures consistent moisture levels. In general, clay soils should be watered and fertilized every 15–20 days, while sandy soils require watering and fertilizing every 10–20 days.
Second, pest infestations tend to increase as temperatures rise. Aphids, red spider mites, and other pests become more active, which can severely damage strawberry crops.
**Solution:** To control aphids, apply a 10% imidacloprid solution diluted at 1:1000. For red spider mites, use an 800–1000 times dilution of dicofol emulsifiable concentrate. It’s best to spray these solutions between 8–11 am. Since red spider mites are mostly found on the underside of leaves, make sure to spray the back of the leaves for better coverage and effectiveness.
Third, some strawberries may develop a “fattening†effect after producing the first batch of fruit. This occurs because the plant uses up a lot of nutrients, and if not replenished, it can negatively affect the second harvest in terms of both yield and quality.
**Solution:** Enhance nutrient supply by applying specialized trace element fertilizers such as Shiba (a foliar fertilizer) and potassium dihydrogen phosphate. These help increase organic matter in the soil and replenish missing elements like manganese, zinc, and calcium. Additionally, supplement with high-efficiency phosphorus and potassium fertilizers. During irrigation, mix diammonium phosphate and potassium sulfate into the water at a rate of 25 kg per mu to ensure even distribution.
By addressing these challenges proactively, growers can significantly improve the productivity and quality of their mulberry strawberries, ensuring better economic returns and long-term sustainability.
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