ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Hot Water treatment and insecticidal coatings for disinfesting limes of mealybugs (Homoptera: Pseudococcidae).

Gould, W. P.; McGuire, R. G.;

Journal of Economic Entomology Year: 2000 Vol: 93 Issue: 3 Pages: 1017-1020 Ref: 15 ref.

2000

บทคัดย่อ

Hot water immersion and insecticidal coatings were tested to determine if they could be used to disinfest Persian limes, Citrus latifolia, of the mealybug pests Planococcus citri and Pseudococcus odermatti. A 20-min 49 deg C hot water immersion treatment is effective in killing mealybugs and all other arthropods tested which are found externally on limes, or under the calyx. No insects or mites were found to survive after the 20-min hot water treatment. In this test, 7200 limes were treated, with 1308 insects killed and zero survivors. Treatment at 49 deg C for 20 min did not significantly affect quality when the treated fruits were compared with the untreated control fruit. Four coatings were tested at a 3% rate: two petroleum-based oils (Ampol and Sunspray oil), a vegetable oil (natural oil), and a soap (Mpede). Ampol gave up to 94% mortality of mealybugs, which is not sufficient to provide quarantine security. The coatings might be effective as a postharvest dip before shipment.