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The eggs of Aleyrodidae generally are laid near each other on the food plant, usually on a leaf, in spiral patterns or arcs, sometimes in parallel arcs. The egg is elongated, with one narrow end produced into a pedicel, which in some species is longer than the rest of the egg. After fertilisation the pedicel shrivels into a stalk. [2]
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.
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.
A larva consumes 1000 whitefly eggs (less if it also eats whitefly nymphs) during its entire development. Adults and larvae feed by piercing the insect with their mouthparts and alternately sucking and regurgitating the internal contents to digest and consume it. Adult females feed more on eggs and first instars than on later stages. They are ...
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.
The preferred prey of M. caliginosus is whitefly but it also feeds on aphids, mites and the eggs of moths. An adult can consume upward of thirty whitefly eggs each day. [1] When offered the greenhouse whitefly (Trialeurodes vaporariorum) and the silverleaf whitefly (Bemisia tabaci) it showed a preference for the former. If the available prey ...
From egg to crawler then through second, third, and fourth instar nymph, and finally, an adult Aleurotrachelus atratus the full life cycle takes around 48 days or 2 months. Most of the days are spread out between the three instar while from egg to crawler takes about 4-12 days for the larvae to hatch.