cankerworm


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Related to cankerworm: palmerworm

cankerworm,

name for two destructive inchwormsinchworm,
name for the larvae of moths of the family Geometridae, a large, cosmopolitan group with over 1,200 species indigenous to North America. Also called measuring worms, spanworms, and loopers, inchworms lack appendages in the middle portion of their body, causing them to
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, or larvae of geometrid moths. The spring cankerworm (Paleacrita vernata) and the fall cankerworm (Alsophila pometaria) are named for the seasons at which the adults emerge from underground pupation. The spring cankerworm larva overwinters as a pupa, the fall cankerworm as an egg. The larvae, dark green to brown and about 1 in. (2.5 cm) long, feed on the leaves of orchard and shade trees. The spring cankerworm has two pairs of posterior appendages (prolegs); the fall cankerworm has three. The wingless female lays her eggs on the bark, and one control method is the placing of bands of sticky paper around the tree trunks to trap the females before laying. When alarmed, cankerworms drop and hang suspended in midair at the end of a long silken thread secreted from their mouths; they ascend this thread after the danger has passed. The English sparrow was originally introduced in the United States to combat the spring cankerworm. Cankerworms are classified in the phylum ArthropodaArthropoda
[Gr.,=jointed feet], largest and most diverse animal phylum. The arthropods include crustaceans, insects, centipedes, millipedes, spiders, scorpions, and the extinct trilobites.
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, class Insecta, order Lepidoptera, family Geometridae. For control methods see bulletins of the U.S. Dept. of Agriculture.

cankerworm

[′kaŋ·kər‚wərm]
(invertebrate zoology)
Any of several lepidopteran insect larvae in the family Geometridae which cause severe plant damage by feeding on buds and foliage.
References in periodicals archive ?
For example, White & Whitham (2000) note that AS of cottonwoods, because of spillover from the attractant "sink" plant, box elder, was only seen in areas with high cankerworm densities.
The first goal of this paper is to document an example of associational susceptibility using the hosts of a common forest pest, the fall cankerworm (Alsophila pometaria).
It is possible that arthropod predators showed a strong numerical response to the cankerworm outbreak, which may have been more common within exclosures given the marginally greater spring leaf damage on exclosure trees.
For example, Roland and Embree (1995) recorded the similar pattern of outbreaks of winter moth, Bruce's spanworm, and fall cankerworm in Nova Scotia Canada, and Klimetzek (1990) described a spatial synchronization of outbreaks of four pine-feeding insects in Germany.
There have been numerous observations of genetic divergence associated with host-plant species, including Alsophila pometaria, the fall cankerworm (Mister et al.
If anyone thought Magu was grandstanding, the disclosure in Abuja by the United Kingdom's Department for International Development should open our eyes to the devastation caused by the cankerworm called corruption.
Evidence of pheromonal constancy among sexual and asexual females in a population of fall cankerworm, Alsophila pometaria (Lepidoptera: Geometridae).
Adaptation to host plants in the fall cankerworm (Alsophilia pometaria) and its bearing on the evolution of host affiliation in phytophagous insects.
The fuel management chain is a lucrative cankerworm of corruption, a serious government can yet tackle it, and it's beyond committees and white papers.
Despite their hypocritical posturing, Church critics themselves are not immune to this cankerworm.
Tenders are invited for provide tree removal and pruning services (services) for tree banding for cankerworms fy 2018 (project).
Spittlebugs appear on pine trees, azalea mites on azaleas, cankerworms on elms and maples, lace bugs on the mountain ash.