Taiwan's Daqing jujube, also known as Indian dates or honey dates, was introduced to Fusui County in Guangxi in the 1990s. Since then, it has become a relatively new and popular fruit tree in the region due to its high productivity, small seed size, sweet flavor, early fruiting (bearing fruit in the same year of planting), and high yield. The variety is highly favored by farmers and consumers alike for its quality and economic value.
In addition to its favorable characteristics, the Taiwan Daqing jujube exhibits strong resistance to diseases and pests, making it a relatively easy crop to manage. However, some common pests and diseases still require attention. Below are the main issues and their control methods:
**Diseases:**
1. **Powdery Mildew:** This disease affects new shoots, leaves, flowers, and fruits. Young fruits are particularly vulnerable, often leading to premature drop. Infected large fruits develop brown, slightly sunken spots, reducing their market value.
**Control:** Apply 50% sulfur suspension at 300 times dilution, 50% carbendazim powder at 800 times, or 20% mancozeb emulsion at 1000 times. Spray every 10–15 days for 2–3 applications.
2. **Anthracnose:** It attacks leaves and fruits, causing light, sunken lesions that later develop pink mold under moist conditions. The mold may contain needle-like red or black spots.
**Control:** Use Tecdo plus Shigong (1:1) diluted to 1000 times or a mixture of 69% Anko manganese zinc and 75% chlorothalonil (1:1) at 1000 times. Spray as needed.
3. **Epidemic Disease:** Fruits infected show brown water-soaked spots, followed by white mold growth, which leads to fruit drop.
**Control:** Apply 69% Anko manganese zinc wettable powder at 800 times or 61% Eprinamanganese zinc at 400 times. Treat 1–2 times depending on severity.
4. **Round Spot Disease:** This affects leaves, starting with small brown spots that gradually expand into circular patterns, eventually causing leaf fall.
**Control:** Use 70% thiophanate-methyl at 500–800 times or 50% mancozeb at 1500 times. Apply every 7 days for 2–3 times.
**Pests:**
1. **Red Spider Mites:** These pests feed on leaves, causing yellowing and damage.
**Control:** Apply 20% chlorfenapyr at 1000 times dilution or 1500 times spray.
2. **Scale Insects:** They suck sap from new shoots and leaves, causing deformation.
**Control:** Use 25% imidacloprid at 1000 times or 48% flupyradifurone at 1000 times during the early larval stage.
3. **Venomous Moth (Larvae):** The larvae feed on leaves, creating holes and damaging foliage. Severe infestations can defoliate young plants.
**Control:** Apply 80% dichlorvos EC at 1000 times, 2.5% kungfu EC at 4000 times, or 20% parathion methyl at 2000 times.
By implementing these management strategies, growers can effectively protect their Daqing jujube crops, ensuring healthy growth and high-quality yields. Regular monitoring and timely intervention are key to successful cultivation.
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