Mango disinfestation strategies in relation to quarantine requirements in the Philippines.
Manoto E. C., Rosario M. S. del
6 fig.
Plant Quarantine and Phytosanitary Barriers to Trade in the ASEAN, 9-10 December, 1986. : 193-207
Abstract : The different disinfestation techniques applied to mango fruits in the light of quarantine requirements are discussed. Preharvest methods include sanitation, wrapping, use of baited lures, sterile insect release and chemical control. Postharvest control methods include fumigation with ethylene dibromide and methyl bromide, cold storage, vapour heat treatment and gamma radiation. Results of a 12-year study conducted in the Philippines using sterile insect release showed that this method could be used to suppress fruit fly populations in mango orchards. A dose of 0.05 kGy was found sufficient to sterilize both sexes. The mature larva was found to be the most resistant stage to gamma radiation and the egg the most sensitive. A dose of 0.50 kGy killed in situ the most resistant stage of Dacus dorsalis. No carcinogenic or mutagenic effects of the treated fruit were observed after radiation at 0.70 kGy. In addition, it was found that exposure to 0.60 kGy extended the shelf life of the fruit to 3 weeks at 30°C, while exposure to 0.5-0.75 kGy and storage at room temperature for 10 days reduced decay by 15 to 40% compared with control fruit.