cankerworm


Also found in: Dictionary, Thesaurus, Wikipedia.
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
..... Click the link for more information.
, 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.
..... Click the link for more information.
, 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.
Key words: Acer negundo; Alsophila pometaria; associational resistance; associational susceptibility, box elder; cottonwood; dietary breadth; fall cankerworm; plant-herbivore interactions; Populus; preference hierarchy; spillover.
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.
Adaptation to host plants in the fall cankerworm (Alsophila pometaria) and its bearing on the evolution of host affiliation in phytophagous insects.
Corruption, they say, is a cankerworm that has eaten deep into the fabric of Nigeria.
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.
She advised youths not to be unnecessarily curious to discover drugs, adding that 'drug abuse is a menace and cankerworm.'
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 issue of illegal mining is a cankerworm as far as this college is concerned; illegal mining is as old as the college.
Cultism is like a cankerworm that has eaten deep in the society and that is why the governor is determined to stop everything about cultism in the state.