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Biological Control of Insect Pests: Southeast Asian Prospects - EcoPort

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4.16 Trichoplusia ni 335<br />

Introductions for biological control <strong>of</strong> T. ni<br />

There do not appear to have been any introductions <strong>of</strong> natural enemies<br />

specifically for cabbage looper, but rather for the complex <strong>of</strong> lepidopterous<br />

larvae with which it is almost always associated. Examples <strong>of</strong> such<br />

introductions are shown in Table 4.16.4.<br />

BRAZIL<br />

The natural enemies <strong>of</strong> T. ni larvae on cotton at 3 sites in Paran‡ Province<br />

included the fungus, Nomuraea rileyi (which killed 76% <strong>of</strong> larvae at one<br />

site), a virus disease (that killed up to 47% at two sites), the parasitoids<br />

Copidosoma truncatellum (reared from about 5% <strong>of</strong> larvae at 2 sites) and<br />

Microcharops bimaculata (reared from 7.5% <strong>of</strong> larvae at 1 site) and the<br />

fungus Entomopthora sp. (which killed 2.5% <strong>of</strong> larvae at 1 site) (Silva and<br />

Santos 1980). The natural enemies <strong>of</strong> T. ni on cotton in Mato Grosso are<br />

discussed by Bleicher et al. (1985) and on tomato in Sao Paulo by Gravena<br />

(1984).<br />

CARIBBEAN<br />

T. ni is usually a minor pest <strong>of</strong> Brassicaceae, although outbreaks<br />

occasionally cause serious defoliation <strong>of</strong> crops. A large number <strong>of</strong> predators<br />

attack larvae, in addition to the parasitoids that are listed in Table 4.16.5.

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