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Woolly aphids on crab apple bark. Pemphigus gall on cottonwood tree Grylloprociphilus imbricator on Fagus Galls made by Melaphis rhois. Woolly aphids (subfamily: Eriosomatinae) are sap-sucking insects that produce a filamentous waxy white covering which resembles cotton or wool. The adults are winged and move to new locations where they lay egg ...
They attach themselves to the plant and secrete a powdery wax layer (hence the name "mealy" bug) used for protection while they suck the plant juices. The males are short-lived, as they do not feed at all as adults and only live to fertilize the females. Male citrus mealy bugs fly to the females and resemble fluffy gnats.
Infected aphids are covered with a woolly mass that progressively grows thicker until the aphid is obscured. Often, the visible fungus is not the one that killed the aphid, but a secondary infection. [92] Aphids can be easily killed by unfavourable weather, such as late spring freezes. [95]
In parts of yard, overwintering bees and other beneficial insects live in dormant plant material. But aphids, beetles lurk in veggie plot.
The adults of Eriosoma lanigerum are small to medium-sized aphids, [4] up to 2mm long, and have an elliptical shape, are reddish brown to purple in colour but the colour is normally hidden by the white cotton-like secretion from the specialised glands in the aphid's abdomen which gives it the common name of woolly apple aphid.
Together with aphids, phylloxerans, scale insects and whiteflies, they form the group called Sternorrhyncha, which is considered to be the most "primitive" group within the true bugs . They have traditionally been considered a single family, Psyllidae, but recent classifications divide the group into a total of seven families ; the present ...
aphids – woolly and gall-making aphids (Eriosomatinae) pine and spruce aphids ; phylloxerans (Phylloxeridae, including the vine phylloxera) whiteflies – (Aleyrodidae) jumping plant lice (Psyllidae and allied families) Superfamily Coccoidea (scale insects) cottony cushion scales, giant coccids, and ground pearls (Margarodidae)
When a cyclical parthenogenesis occurs, aphids reproduce sexually in the autumn and produce an overwintering egg, deposited on buds and bark crevices of the host plant. In spring the newly hatched nymphs develop in about two to three weeks and at least three molts to wingless, 2–3 mm large Fundatrix.