Diamondback Moth

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Diamondback Moth

 

(Plutella maculipennis), a butterfly of the family Plutellidae, injurious to cruciferpus plants. Wing-span, 14–17 mm. The anterior wings are grayish or blackish brown with a wavy white stripe on the interior edge; the posterior wings are gray with a long fringe. The caterpillar is 9–12 mm long, spindle-shaped, and green. The eggs are pale yellow. The diamondback moth is distributed throughout the world. It does most damage to cabbage and rutabaga plants. There are between one and eight generations each year; the chrysalides winter on cruciferous weeds, stumps, and leaves. The moths emerge between April and June. One to three eggs are laid on the underside of leaves or on stems. The caterpillars first penetrate into the leaf tissue. They subsequently appear on the leaf surface, eating “little windows” in the leaves. Measures taken against the diamond-back moth include destruction of weeds, tillage of harvest remains, and treatment of plants with insecticides and the microbiological preparation entobacterin.

References in periodicals archive ?
Diamondback moth, Plutella xylostella (L.) (Lepidoptera: Plutellidae), is the most important insect pest of cruciferous crops throughout the world (Javler 1992).
Rothamsted Research, in Hertfordshire, issued a warning that exceptionally high numbers of the diamondback moth are arriving in the UK, after reports from a network of moth traps around the country.
Resistance of Diamondback Moth (Lepidoptera; Plutellide) to Bacillus thuringiensis subspecies in the field.
In this experiment, rapeseed leaves of each cultivar were tested in separated oviposition cages, as previously described, so that the diamondback moths were not given a choice among rapeseed cultivars.
Research revealed that biocides - organic proteins toxic to Diamondback moths but harmless to beneficial insects, birds, other animals and humans - are more desirable than chemical pesticides.
Indirect interactions and nonadditive effects of herbivory on plant fitness were examined for flea beetles (Phyllotreta cruciferae: Chrysomelidae) and diamondback moths (Plutella xylostella: Plutellidae), two of the more common herbivores feeding on B.
Producers continue to spray for bertha armyworms and diamondback moths in canola fields.
Experts have warned of a potential explosion in numbers of diamondback moths Rothamsted Research
Although the terpene alcohol is present in various Brassica spp., this chemical, in combination with limonene and [alpha]-terpinene, has been reported as a repellent and oviposition deterrent to adult diamondback moths (Zhang et al.
Some populations of diamondback moths are no longer affected by sprays organic farmers use on cabbage and related crops.
"In addition to synthetic insecticide-resistance development worldwide, several pests have developed resistance to foliar Bt, including Indianmeal moths, diamondback moths, and at least nine other insects," says entomologist D.D.