If only one egg mass is found in my blue spruce field, why must the entire field be restricted? Why can an intensive inspection pass the remaining trees?
Remember that gypsy moth can live completely on blue spruce and partially on fir and Douglas fir. If one egg mass is found on these suitable host species, then the likelihood of more egg masses being laid in the field is high. Also, it is extremely difficult to find egg masses in these types of trees. MDA cannot guarantee that 100% of the remaining trees are completely free of egg masses. A combination of pesticide treatments and visual inspections works best to assure that certified trees are free of gypsy moth.
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