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Pemphigus betae, also known as the sugarbeet root aphid, is a species of gall-forming aphid that forms galls specifically on the commonly found narrowleaf cottonwood (aka the willow-leaved poplar tree), Populus angustifolia. Sugarbeet root aphids have been found in North America and Europe. [2]
Rhopalosiphum rufiabdominale, the rice root aphid or red rice root aphid, is a sap-sucking insect pest with a wide host range and a global distribution. [2] As a member of the superfamily Aphidoidea, it is one of 16 species of the genus Rhopalosiphum. [3] Adults and nymphs are soft-bodied and usually dark green with brown, red, or yellow tones. [4]
Excessive heat kills the symbiotic bacteria that some aphids depend on, which makes the aphids infertile. [96] Rain prevents winged aphids from dispersing, and knocks aphids off plants and thus kills them from the impact or by starvation, [92] [97] [98] but cannot be relied on for aphid control. [99]
Rhopalosiphum maidis, common names corn leaf aphid and corn aphid, is an insect, and a pest of maize and other crops.It has a nearly worldwide distribution and is typically found in agricultural fields, grasslands, and forest-grassland zones.
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 ...
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.
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 ...
The hoverflies, Heringia calcarata and Eupeodes americana, have also been used as effective biological control organisms. [9] Areopraon lepelleyi is another species of wasp which is a parasitoid of the woolly apple aphid. [4] In addition, entomopathogenic nematodes have been used to control root-dwelling populations of E. lanigerum. [4]
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