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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]
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.
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.
Aleurodicus dispersus, the spiralling whitefly, is a species of small, white sap-sucking insect, a true bug in the order Hemiptera.It originated in Central America and the Caribbean region and has spread to many of the world's tropical and subtropical regions, where it has become a major pest of agricultural crops.
As well as controlling greenhouse whitefly and silverleaf whitefly (Bemisia tabaci), it feeds on russet mites (Aceria anthocoptes), predatory mites, aphids and the eggs of moths. [8] It causes some damage to green tomato fruits in the absence of sufficient alternative plant sources of food, but does not cause sufficient harm for the ripe fruit ...