New Pest Response Guidelines - aphis - US Department of Agriculture

Control Procedures
Barriers
Suppression
10cm wide vinyl tape may be wrapped around trees at the base to impede the
movement of caterpillars up the tree at the end of winter. This simple
procedure results in a reduction of between 65 to 79% of the larvae of
Dendrolimus superans and a corresponding reduction in damage to the tree
(Higashiura, 1991). A variation of the above is to add a 1¼ cm strip of
waterproof material just below the tape and run it sideways up the tape to just
about the middle of the tape at a point halfway across the trunk and hang a net
there to catch caterpillars crawling up the strip and falling into the net. This
will provide a population estimation of the pest population (Fukuyama, 1978).
Both the above two procedures will expose caterpillars to predators and
parasites.
Strings treated with 2.5% deltamethrin or 20% pyrethroids with diesel oil and
machine oil (3:80:20) are wrapped around trees at the base in April or May
when Dendrolimus superans caterpillars are gathered around the bottom of the
trunks and ready to climb. This is also when these larvae are very weak after
the winter. This technique produces a mortality rate of 100%. Sunshine or rain
does not affect the results (Guo et al., 1984).
Note: These techniques are labor intensive and should be used only if the
infected area is very limited in extent and/or there is a real chance of
eliminating the invasive population by interrupting the life cycle in this
manner.
Pest management includes steps taken to either contain or suppress a pest
population. Damage attributed to Dendrolimus moths is most effectively
managed with the controls described below.
6-4 Dendrolimus Pine Moths 12/2012-01