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1-20 of 20 possibilities

tall perennial grass that spreads by creeping rhizomes and is grown for fodder; naturalized in southern United States where it is a serious pest on cultivated land Aleppa grass , evergreen millet , Johnson grass , means grass , Sorghum halapense , Sorghum halepense
plant pest aphid , aphis , mite
strain accidentally imported into Florida from the Middle East then spread to California where it is a very serious pest feeding on almost all vegetable crops and poinsettias Bemisia tabaci , poinsettia strain , superbug
common household pest originally from Asia that has spread worldwide black rat , Rattus rattus , roof rat
small light-brown cockroach brought to United States from Europe; a common household pest Blattella germanica , crotonbug , Croton bug , German cockroach , water bug
weedy Eurasian plant often a pest in grain fields Brassica kaber , chadlock , charlock , field mustard , Sinapis arvensis , wild mustard
common domestic rat; serious pest worldwide brown rat , Norway rat , Rattus norvegicus
serious garden pest having a brown shell with paler zigzag markings; nearly cosmopolitan in distribution brown snail , Helix aspersa
pest on citrus trees brown soft scale , Coccus hesperidum
small brown and white European moth introduced into eastern United States; pest of various shade and fruit trees brown-tail moth , browntail , Euproctis phaeorrhoea
green caterpillar of a geometrid moth; pest of various fruit and shade trees cankerworm
type genus of the Chlamydomonadaceae; solitary doubly-flagellated plant-like algae common in fresh water and damp soil; multiply freely; often a pest around filtration plants Chlamydomonas , genus Chlamydomonas
Asiatic insect introduced accidentally into United States; pest on citrus and apple trees Comstock's mealybug , Comstock mealybug , Pseudococcus comstocki
larva of the European corn borer moth; a serious pest of maize corn borer , Pyrausta nubilalis
grasses with creeping stems that root freely; a pest in lawns crabgrass , crab grass , finger grass
large Old World freshwater bottom-feeding fish introduced into Europe from Asia; inhabits ponds and sluggish streams and often raised for food; introduced into United States where it has become a pest Cyprinus carpio , domestic carp
canine pest flea
type genus of the Lymantriidae; a pest (Lymantria means `destroyer') genus Lymantria , Lymantria
European moth introduced into North America; a serious pest of shade trees gipsy moth , gypsy moth , Lymantria dispar
greenish aphid; pest on garden and crop plants greenfly
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