Tea garden plant biostimulants jivagro. Derived from the leaves of the Camellia sinensis, an evergreen shrub native to East Asia, tea is an aromatic beverage prepared by steeping the cured tea leaves in boiling water or milk. The major pests that affect tree plantations are Tea Loopers, Red spider mites, thrips, tea mosquito bugs etc. Biostimulants are natural or synthetic substances that are applied to seeds, plants and the soil to influence plant growth. They achieve this by helping plants to improve nutrient use efficiency, tolerate abiotic stress like heat, cold, drought and excessive water, and improve quality attributes like nutritional content and shelf-life.