New Pest Response Guidelines - Phytosanitary Resources

Noctuidae: Spodopotera
Chapter 6. Control
After an estimated two generations of negative trapping and survey,
applications may be discontinued.
Treat all plants within the enclosure to eliminate hiding places for the adults
and to kill any larvae present on host plants. Direct sprays to the underside of
leaves where larvae congregate. Drench the soil beneath each plant/host where
older (3 rd to 4 th instar) larvae hide during the day.
Avoid insecticide resistance
To avoid the development of resistance, rotate the application of
recommended insecticides.
Defining the treatment area
Once a decision has been made to eradicate spodoptera, use the decision table
(Table 6.1) to define the treatment area.
Table 6.1. Decision table of treatment options for spodoptera.
IF:
1-5 gravid
females,
larvae or
pupae
2-5 males or
virgin females
6 or more,
any stage
Are detected
in an area:
less than 6
square miles
greater than 6
square miles
THEN treatment will commence and
extend:
200 yards beyond the detection site on
host(s)
2 ½ miles beyond the detection site on
host(s)
Treatment options
Treatment may include:
• Sanitation and destruction of wild and cultivated hosts, and/or
• Application of recommended insecticides (aerial or ground) and/or
• Application of other cultural controls and/or
• Application of biological controls
Sanitation and destruction of hosts
Carry out sanitation in nurseries, farms, gardens, and other establishments
where wild and cultivated hosts are present within the core and buffer areas.
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