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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 ...
Aphids have a tail-like protrusion called a cauda above their rectal apertures. [12] [30] They have lost their Malpighian tubules. [31] When host plant quality becomes poor or conditions become crowded, some aphid species produce winged offspring that can disperse to other food sources. The mouthparts or eyes can be small or missing in some ...
Eggs are laid at the base of the host plant and these hatch in the spring. Winged forms are produced after three generations and these winged aphids then move on to other plants. [4] In the autumn the aphids move on to the seed pods of the host plant. [4] Like most aphids, M. viciae is viviparous. [4]
Winged females leave the gall in late summer and fly to moss, where they establish asexually reproducing colonies. The colonies produce the males and sexual females responsible for recolonizing sumac each spring." [3]: 758 In 1989, it was reported that the use of alternate plant hosts by the aphids dates from 48 million years before present. [6]
Macrosiphum rosae, the rose aphid, is a species of sap-sucking aphids in the subfamily Aphidinae. [1] [2] They have a world-wide distribution and infest rosebushes as the main host in spring and early summer, congregating on the tips of shoots and around new buds. Later in the summer, winged forms move to other rose bushes, or to a limited ...
Pemphigus spyrothecae is in the superfamily Aphidoidea, in the hymopterous division of the order Hemiptera, which consists of insects with sucking parts of the mouth. P. spyrothecae is a member of the suborder Sternorrhyncha, which includes scale insects, psyllids, whiteflies, aphids.
Hyadaphis winged and wingless adults When wings are present they occur only on particular morphs called " alates ", and wingless morphs are said to be " apterous ". The forewing ( mesothoracic wing) of the alate in the Aphididae has four to six veins attached to a major vein-like structure that has been interpreted as the combined stems of all ...
Female aphids reproduce by parthenogenesis, males have never been observed in the wild but have been produced under laboratory conditions. [10] Females may be wingless or winged , the production of the alate form occurs a higher rate in those regions where it is necessary for oleander aphid to migrate each year on to temporary hosts. [11]