These short summaries are organized by common pest name in alphabetical order. If you have any questions or additional information about a particular disease, please email us at

Whitney Cranshaw, Colorado State University,


 Aphis spp.

Over 250 different species exist worldwide. Most are host specific, but some have broad host ranges that can be as many as 100+.

close up of adult on common sunflower

Banded Cucumber Beetle

Diabrotica Balteata

Primary host plants include melons, cucumber, pumpkins, soybeans, sweet potato, and beans.

John Capinera, University of Florida,

Beet Armyworm

Spodoptera exigua

Wide range of host plants that include: alfalfa, asparagus, bean, beet, broccoli, cabbage, cauliflower, celery, chickpea, corn, cotton, cowpea, eggplant, lettuce, onion, pea, peanut, pepper, potato, radish, safflower, sorghum, soybean, spinach, sugarbeet, sweet potato, tobacco, tomato, and turnip.

adult boll weevil on cotton

Boll Weevil

Anthonomus grandis

Found mainly in cotton, but also in okra, hibiscus, and other plants related to cotton.

multiple life stages

Citrus Blackfly

Aleurocanthas woglumi

Has over 300 hosts, but prefers citrus.
Adults and nymphs suck plant sap and secrete honeydew substance that promotes the growth of sooty mold on surface of leaves. The formation of mold inhibits photosynthesis.

adult citrus root weevil on leaf

Citrus Root Weevil

Diaprepes abbreviatus

Native to the Carribbean area. It has established in Florida and has been quarantined to prevent spread of infestation in California. Is also a quarantine pest in Texas.

Citrus Rust Mite

Phyllocoptruta oleivora

Can not be seen with unaided human eye.
Present throughout the year, but peak populations usually occur in June and July.

adult colorado potato beetle

Colorado Potato Beetle

Leptinotarsa decemlineata

Hosts include potato, tomato, eggplant, pepper, cabbage, petunia and tobacco.
Weed hosts include buffalo bur, jimson, henbane, horse-nettle, belladonna, thistle, nightshade, mullein and ground cherry.

adult cotton boll worm on a flower

Cotton Bollworm

Helicoverpa zea

Very similar to tobacco budworm (Heliothis virescens) in both appearance and life cycle. Commonly grouped together for control purposes.
Known by many other common names: corn earworm, tomato fruitworm, vetchworm, sorghum headworm and soybean podworm are a few.

adult on the common bean

Cowpea Curculio

Chalcodermus Aeneus

Primarily feed on various legumes, but can be found on cotton, soybean, and strawberry.
Can survive on several weed hosts, including: cutleaf evening primrose, moss verbena, wild bean, purple cudweed, heartwing sorrel, sheep sorrel, and spring vetch.
Cowpea is the preferred host.

larva of the fall armyworm

Fall Armyworm

Spodoptera  frugiperda

Wide range of at least 80 host species which include: alfalfa, apple, barley, buckwheat, cotton, clover, grape, flowers, millet, oat, orange, papaya, peach, peanut, ryegrass, strawberry, sugar beet, sudangrass, soybean, sugarcane, timothy, tobacco, and wheat.

damage to southern blueberry by plum curculio

Plum Curculio

Conotrachelus nenuphar

Prefer plums but also infest peaches, apples, pears, cherries, quince, blueberries and other fruits.
Non-crop hosts include wild plum, hawthorn, and crabapple.

colony of russian wheat aphid in wheat leaf

Russian Wheat Aphid

Diuraphis Noxia

Distinguished from all other aphids by cigar-like, spindle shaped body and terminal end that appears to be split at the tip when viewed with a hand lens

adult silverleaf whitefly and egg cases

Silverleaf Whitefly

Bemesia Argentifolii

Extremely large host range of at least 500 species in 74 families. Cucurbits, tomato, potato, cotton, peanut, soybean, peppers, beans, eggplant, cabbage, poinsettia, hibiscus, and chrysanthemum are just a few.

Alton N. Sparks, Jr., University of Georgia,

Tomato Pinworm

Keiferia lycopersicella

Host plants include tomato, eggplant, and potato.
Weed hosts include: nightshade and horsenettle.

foliage damage to bean leaf by the western flower thrips

Western Flower Thrips

Frankliniella Ocidentallis

Several crop hosts including: peanuts, tomatoes, lettuce, celery, peppers, peas, onions, apples and grape