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Bemisia tabaci, silverleaf whitefly, is a pest of many agricultural and ornamental crops. Trialeurodes vaporariorum, greenhouse whitefly, a major pest of greenhouse fruit, vegetables, and ornamentals; Although several species of whitefly may cause some crop losses simply by sucking sap when they are very numerous, the major harm they do is ...
Greenhouse whitefly nymph. Adult. Females are capable of mating less than 24 hours after emergence and most frequently lay their eggs on the undersides of leaves. Eggs are pale yellow in colour, before turning grey prior to hatching. Newly hatched nymphs, often known as crawlers, are the only mobile immature life-stage. During the first and ...
Eggs are laid in groups, being small in size with dimensions of 0.2 millimetres (1 ⁄ 128 in) wide and 0.1 millimetres (1 ⁄ 128 in) in height. Eggs are initially whitish in color and change to a brown color near hatching, within 5 to 7 days. After hatching, the whitefly nymph develops through four instar stages.
The cabbage whitefly (Aleyrodes proletella) is a species of whitefly from the Aleyrodidae family. It has a global distribution. [1] [2] There are usually four to five generations per year. The development of a generation varies from three to six weeks. A female can lay up to 150 eggs.
Both larvae and adults are active predators that can consume numerous eggs or nymphs each day. An adult Delphastus takes no longer than half a minute to handle a whitefly egg, and devours up to 160 eggs or 12 large nymphs daily. A larva consumes 1000 whitefly eggs (less if it also eats whitefly nymphs) during its entire development.
Aleurocanthus spiniferus, the citrus spiny whitefly, is an insect native to Asia. It is considered an invasive pest, notably affecting citrus and tea plants. They are part of the whitefly family. A. spiniferus is indigenous to parts of tropical Asia, where it was first discovered in Japan c. 1903, soon after which it spread around the world.
Once the egg hatches it will begin hunting and consuming early instars of whitefly. Larvae will glue whitefly eggs, wax and empty puparium using secreted mucus to their body, which is believed to act as camouflage. The larvae will move from leaf to leaf in search of prey and eat between 30 and 40 developing whitefly.
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