This technology has been supported by Hung Yen Department of Agriculture and Rural Development in 5 models of growing longan and citrus in Kim Dong, Tien Lu and Hung Yen districts.

Models have attracted nearly 100 gardening households to participate. People have been trained, instructed to use nano preparations, measures to care for labels and oranges and supported a part of nano-products and fertilizers.

According to Mr. Nguyen Quang Tin and the orange growing households in Dong Thanh commune (Kim Dong), compared to the traditional method of preventing and eliminating pests, the application of S500 nano product brings outstanding advantages, high efficiency in the room, except for ulcer disease, fruit scars, fungal and bacterial prevention; Orange peels are berry, dark green, bright, when ripe, yellow, beautiful code, time is faster. The investment cost for each hectare is less than 7 million VND, the profit increases by more than 20 million VND compared to the production output outside the model.

Mr. Nguyen Van Trang, Deputy Director of Hung Yen Department of Agriculture and Rural Development said: Through monitoring and evaluation, models of application of nano preparations to prevent pests and diseases on fruit trees can replacing chemical pesticides to destroy pathogens, fruit cracking, fruit scar disease and fruit ulcers. Nano silver, copper is a clean, non-toxic product, does not cause environmental pollution, does not cause toxic residues on agricultural products, safe to use. From this effect, Hung Yen province will continue to deploy on a large scale.