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(FAW): Has 4-5 generations in the south – migrates
upward from FL and populations get worse mid- to-late-season on specialty or
row crops. Prefers to feed on grasses then move to various row crops and
vegetables that include fruiting crops.
Below are graphs showing seasonal population fluctuation of the two species.
Soybean looper (SL): Infestations happen from migrating
populations or moths may be moved by weather systems. SL attack soybean and
peanuts among other row crops. Also attacks many summer vegetable crops during
Cabbage loopers (CL): We
have a few locations across AL where we are monitoring this highly migratory
insect. Adult moths are known to overwinter in south Florida. Host plants
include a variety of crucifer crops along with sweet potatoes, beans, peas,
squash, tomato, and watermelons.
CL activity update: Moth activity
has increased two times over the past four weeks – so population pressure has
risen slowly with overlapping generations of caterpillars feeding on crops now.
In peanut fields in south Alabama, we have seen mixed populations of CL and SL
caterpillars along with velvetbean caterpillars causing rapid defoliation in
(TBW): Has about
5 generations in the south. Host crops include cotton, soybean, and peanuts
among others. May also attack vegetables as pea, pepper, pigeon pea, squash,
LCB activity update: LCB is a ‘hidden enemy’ that has been
detected in very high numbers across the state – several overlapping generations
cause large buildup of this insect. The southeastern and southwestern regions
of the state have very high moth activity (possibly in the fourth or fifth
generation) – drought can rapidly increase larval activity in the soil. So far
we have collected and removed over 5,000 LCB moths – the most of any insect we
have monitored this summer. Escambia, Henry, and Lee Counties appear have the highest
moth numbers. Peanut producers should remain alert and refer to the US drought
map (see below). Producers must directly scout crops to detect infestations.
borer (SVB): Has one to two generation per year depending
on location. Moths are day-flying and they can migrate long distances during
early spring to find host plants. Moths look like wasps and lay eggs on the
stem close to the soil. Caterpillars cannot be killed once they burrow inside
the plant stalk, so use pest prevention tactics. Vines must be protected using
insecticides or with insect netting to reduce egg laying.
SVB activity update: We
are continuing to monitor this insect in order to record season-long activity
and life cycle fluctuations. We have detected at least two to three generations
of this insect with peaks in late July (1) and August (2). Moth numbers are
highest in central AL (Clanton) with similar numbers in north and south AL (e.g.,
Cullman and Brewton). Producers must destroy squash vines and bury the trash to
prevent buildup of caterpillars in the soil.
U.S. Drought Monitor: Click here for latest drought map and detailed report - http://droughtmonitor.unl.edu/Home/StateDroughtMonitor.aspx?AL
For peanut or vegetable IPM questions, please call Ayanava
Majumdar, 251-331-8416, firstname.lastname@example.org
or use the resources below.
Vegetable IPM: www.aces.edu/vegetableipm
Peanut IPM: www.aces.edu/peanutipm
Facebook pages: Alabama
Vegetable IPM or Alabama Peanut IPM
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