Effect of Potassium Sorbate and Thiabendazole Mixture on the Control of Green and Blue Molds of Citrus Fruit

Abstract

1. Potassium sorbate applied at 20, 000ppm effectively controlled green and blue molds (Penicillium digitatum Saccardo and P. italicum Wehmer) inoculated artificially to satsuma mandarin, and was comparable to TBZ at 1, 000ppm. Lower concentrations of sorbate were less effective.
2. When potassium sorbate was applied in combination with TBZ, the effectiveness was synergistically increased. For example, 500ppm TBZ+1, 000ppm potassium sorbate was as effective as 1, 000ppm TBZ.
3. The synergistic effects of TBZ+potassium sorbate were also observed in retarding the growth of both green and blue molds in agar culture.