wingless females

Listing 1 - 10 from 27 for wingless females

Ask Extension Database, NDSU Extension Service
... inexpensive "banding" method of control can be considered. Why band trees? The female cankerworms are wingless moths. They emerge from the soil in the fall (mid- to late-September) if they ... cankerworms. Both species are present in North Dakota. Soon after emerging from the soil, the wingless females crawl up the tree trunk into the branches and twigs where the eggs are deposited ...
ndsuext.nodak.edu

FPHG -
... or on buds in the fall by the wingless female. The eggs hatch in spring about silver tip. They hatch into stem mothers--wingless females that are pear shaped and bright green. These give birth to a generation of green viviparous aphids, about three-quarters of which develop into winged females. The rest remain wingless. The ...
ssfruit.cas.psu.edu

FPHG -
... from the eggs in spring are all viviparous (giving live birth) wingless females, which are called "stem mothers" when mature. The bodies of these ... day. The nymphs of the second generation, all of which are females, reach maturity in 2 to 3 weeks; the great majority begins ... aphids. In the fall, the winged females fly back to the apple trees. The males mate with the females, which then deposit eggs on ...
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Rosy Apple Aphid
... Immature aphids that hatch from the eggs in spring are all viviparous (producing live young), wingless females, and when mature are called stem mothers. The body of the immature aphid changes ... during the summer before winged females fly back to apple in the fall. These females produce wingless oviparae, which mate with returning winged males from the summer hosts. Mated females deposit an average ...
www.caf.wvu.edu

Apple Aphid
... wide. Nymph: The nymphs are all viviparous wingless females. The five instars include the last stage, which is the stem mother. Adults: The wingless viviparous females are pear-shaped and light green, though in ... Foliar senescence and predator activity are important factors in lowering aphid populations. Life History The wingless females lay eggs mostly on the bark or on the buds in the fall. The ...
www.canr.msu.edu

Rosy Apple Aphid
... of this generation develop wings and migrate to the narrow-leaved plantain. In some seasons, wingless females of the third generation produce a fourth generation on apple. In recent years, it has ... 40 days to reach maturity and produce young. The majority of the second generation is wingless females. The average total production of each individual in the second generation about 119. The habits ...
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Questions On Spruce
... early September, and several days later the adult winged males emerge and mate with the wingless females at the lower tip of the case or bag they are carrying. The male dies ...
www.ext.nodak.edu

Brevicoryne brassicae
... cabbage aphid and Myzus persicae (green peach aphid). Both apterae (wingless) and alate (winged) aphids are able to transmit the virus ... in appearance to adults except for their smaller size. ADULTS Wingless females are 1/10 inch long and somewhat oval in shape. ... increase in size toward the posterior end. Winged females, somewhat smaller than the wingless forms, are not covered with waxy powder. The ...
www.extento.hawaii.edu

Lipaphis erysimi
... length of 8-9 days total. Minor variations in these durations occur between winged and wingless forms when raised on cabbage, cauliflower, mustard and radish (Sachan and Bansal, 1975). Refer to ... that wingless females produce 70-87 young in their lifetime, while winged females produce 31-40 young. Male aphids are olive-green to brown in color. They are considerably smaller than the females and ...
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May 2001
... hatch in the spring into wingless females. When they reach adulthood, they reproduce parthenogenetically and give birth to young rather than eggs. Two or more generations of such females may be produced. A ... attached to clothing. So much for their lifestyle, how about getting rid of them? The wingless females crawl around very slowly and are therefore very vulnerable as long as they are stopped ...
www.soos.ca

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