Panumas Kotepong is currently working as a senior scientist at the Department of Agriculture,Thailand. He has received his Ph.D. on horticuture from Kasetsart University, Thailand and postdoctoral studies on plant biology from Lincoln University, New Zealand.

Calcium boron spraying was performed to maintain quality and reduce disease incidence of Princess 70 cherry tomatoes by using 3 methods as follows: 1) no spray calcium boron (control) 2) spray calcium boron at a concentration of 0.25% and 3) spray calcium boron at a concentration of 0.5% for 3 times within 30, 40 and 50 days after flowering. Therefore, harvesting the produce during the full ripening stage. Then packed on polyvinyl chloride (PVC) trays of 200 g/tray and then put in low density polyethylene (LDPE) plastic bags.