Volume 57 Number 10 Date 06/14/2012 COLORADO POTATO BEETLE -
Larvae from overwintered beetles are predominantly in the first
and second instars. Bacterial insecticide treatments of Bacillus
thuringiensis var. tenebrionis (Btt) are most effective at this
time, while the larvae are very small. Most products persist
only 1-2 days and must be reapplied 2-3 times to effectively
control populations. CABBAGE LOOPER - Damaging populations of
this typically late-season pest have been reported in cole crops
in southeast Wisconsin. Migrants arrived in the state earlier
than normal this year and temperatures in subsequent weeks have
been very conducive for oviposition and rapid larval
development. STRIPED CUCUMBER BEETLE - Home gardeners are
reporting minor damage to cucurbits, especially in the southwest
and west-central areas. Treatment may be justified for
infestations of 4-5 beetles per 50 plants. CORN EARWORM - Low
numbers of migrants have been collected in black light and
pheromone traps at scattered sites since ea