Citrus has problem for greening diseases, shabby plant, slow revitalization and softfruit.

It effects to the product yield and fruit price. Citrus crop at Pong NumRorn sub-district, Fang district, Chiang Mai province still has problem. R&D Department tried to research and develope by application special fertilizers, plant hormones, plant nutrients and adjuvant from Stoller, USA. We applied by soil and foliar spraying to improve the roots, plant strengthe, foliage enlargement, fruit improving.

 This trial conducted in January 2019 and follow up until harvest. After application, the plant is good health, leaves enlargement with green leaves, good fruit set, big size and improve skin finish. Citrus's owners impressedour products and hope to get more money. They also invite us to continue for the next field trial.