wingless females

Listing 1 - 10 from 51 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 ...
ssfruit.cas.psu.edu

FPHG -
... . Peach trees are its primary host and overwintering source. Green peach aphids overwinter as wingless females and/or eggs underneath peach buds. Eggs hatch and young nymphs develop into stem ... , rain, cold weather, and predators are important in regulating populations. After several generations of wingless adults, winged aphids appear during June, and all aphids leave peach trees during June ...
ssfruit.cas.psu.edu

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 ...
www.canr.msu.edu

Woolly Apple Aphid
... The females lay eggs in cracks or crevices of elm tree bark in the fall. The eggs hatch in the spring into wingless, parthenogenetic ... to elm, where they give birth to males and females. Both males and females are wingless, have no mouthparts and do not grown after ... , water sprouts and callus tissue in wounds, cankers and scars. Wingless females in the aerial colonies may give birth to nymphs at any ...
www.canr.msu.edu

Black Cherry Aphid
... -bodied and black, and measures about 3 mm long. Adult aphids may be winged or wingless. Wingless forms occur during most of the season. Host Range The black cherry aphid has shown ... from the overwintering eggs rapidly establish colonies on the new growth by giving birth to wingless females. The process is called parthenogenetic ovoviviparous reproduction. Within a few weeks, the tips of the ...
www.canr.msu.edu

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