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Sunjoy Agro is one of China’s leading crop protection companies. It established business in 88 countries, with a global turnover of US$300 million.
Company
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We believe innovation is the answer to today’s agricultural challenges.
Farming
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We provide plant protection and plant nutrition products that help build healthy and sustainable food systems.
Solutions
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Sunjoy Agro implements the concept of sustainability development throughout the corporate mission, philosophy and strategy.
Sustainability
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Thank you for your interest in Sunjoy Agro. We welcome students and working professionals to apply for opportunities throughout the year.
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Case Studies
We provide plant protection and plant nutrition products that help build healthy and sustainable food systems.
Control Rose Powdery Mildew by GREYHUNTER
Fungicide
Powdery mildew presents a formidable challenge for rosarians, adversely impacting both the beauty and the vitality of roses. It primarily affects leaves, shoots, and flowers, characterized by the appearance of white, powdery substances on infected areas. During the growing season, diseased leaves exhibit small, white powdery spots that gradually enlarge into round or irregular patches. In severely affected regions, these spots may merge together extensively. Older leaves tend to have better resistance to the disease. The layer of white powder on petioles and thorns is often thick and difficult to remove. When buds are infected, their surfaces become entirely covered in white powder, leading to deformed blooms.
The most active period for rose powdery mildew begins in spring when the weather starts to warm up and continues throughout the summer and into part of the autumn. Poor ventilation and high humidity can promote the growth of the fungus.
To prevent the incidence of rose powdery mildew, it is important to conduct proper field management. Sun joy Agro recommends growers to plant at a reasonable density, and practice crop rotation; in greenhouses, ensure good ventilation and light penetration while avoiding excessively high temperatures, maintaining a certain level of humidity; after rain, promptly drain and ventilate to prevent moisture accumulation inside the greenhouse.
In addition, rose powdery mildew can be prevented by chemical treatment. Before the disease occurs, protective fungicides can be used with an interval of 7-10 days. If powdery mildew has already occurred, Sunjoy Agro recommends the use of GREYHUNTER SC (Pyraclostrobin 150g/L + Boscalid 300g/L SC).
Pyraclostrobin is classified under FRAC Group 11. It is a strobilurin that inhibits mitochondrial respiration. Boscalid is categorized under FRAC Group 7. It is a carboxamide that inhibits succinate dehydrogenase. The optimum combination proportion of Pyraclostrobin to Boscalid is 1:2, resulting in a significant synergistic effect. It effectively prevents and treats various fungal diseases such as gray mold, leaf spots, and powdery mildew while reducing the likelihood of fungal pathogens developing resistance. This dual-action formula penetrates deeply, curbing fungal development and stimulating robust recovery.
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