Low temperature storage combined with sulfur dioxide slow release pads forquarantine control of omnivorous leafroller Platynota stultana (Lepidoptera : Tortricidae)
Low temperature storage combined with sulfur dioxide slow release pads caus
ed 100% mortality of omnivorous leafroller, Platynota stultana Walshingham,
2nd instar (the least susceptible stage to low temperature storage) after
3 wk of exposure in table grapes, Vitis vinifera L. Temperatures in packed
grape clusters decreased from ambient to 2 degrees C within approximate to
2 d after placement in storage. Sulfur dioxide concentrations in the grape
clusters ranged between 0.2 and 1.0 ppm during the to 6-wk storage period T
he combination treatment incorporates existing packinghouse facilities and
has potential to be used as an alternative to chemical fumigants such as me
thyl bromide to control pests of regulatory concern in exported table grape
s.