// Pest Intelligence
Pest Identifier
Identify the 12 most common crop pests in the Mid-Atlantic region. Know their damage patterns, optimal treatment windows, and how drone spraying can protect your fields.
Japanese Beetle
Popillia japonica
Skeletonizes leaves by feeding between veins, leaving a lace-like pattern. Adults emerge mid-June through August. Larvae (grubs) feed on turf and crop roots, causing secondary damage below ground.
Best Treatment Window
Late June - Early July (adult emergence)
Spotted Lanternfly
Lycorma delicatula
Invasive planthopper that feeds on plant sap, excreting honeydew that promotes sooty mold growth. Massive swarms can weaken and kill grapevines and fruit trees. NJ is a quarantine zone for this pest.
Best Treatment Window
May - June (nymph stage) & Sept - Nov (adults)
Aphids
Aphidoidea spp.
Colonies cluster on new growth and leaf undersides, extracting phloem sap. Causes curling, yellowing, and stunted growth. Aphids also transmit viral diseases between plants, amplifying crop losses.
Best Treatment Window
Early spring at first colony sighting
Spider Mites
Tetranychus urticae
Tiny arachnids that pierce leaf cells and extract contents, causing stippling and bronzing. Fine webbing appears on leaf undersides in heavy infestations. Thrive in hot, dry conditions common in NJ summers.
Best Treatment Window
June - August (hot, dry periods)
Corn Earworm
Helicoverpa zea
Larvae bore into corn ears through the silk channel, feeding on kernels from the tip down. Also attacks tomato and pepper fruit. One of the most economically damaging pests of sweet corn in the Mid-Atlantic.
Best Treatment Window
July - August (peak silk stage)
Tomato Hornworm
Manduca quinquemaculata
Large green caterpillars that can defoliate entire tomato plants rapidly. Feed on leaves, stems, and green fruit. Their camouflage makes them hard to spot until significant damage is done.
Best Treatment Window
June - August (larval stage)
Blueberry Maggot
Rhagoletis mendax
Female flies lay eggs inside ripening berries. Larvae tunnel through fruit flesh, causing premature drop and unmarketable fruit. Zero tolerance for this pest in commercial blueberry operations in NJ.
Best Treatment Window
Late June - July (pre-harvest)
Oriental Fruit Moth
Grapholita molesta
Larvae bore into shoot tips in spring, then shift to fruit as it develops. Creates tunnels through peach flesh, often entering near the stem. Multiple generations per season in NJ's climate.
Best Treatment Window
April - May (first generation) & July (fruit entry)
Brown Marmorated Stink Bug
Halyomorpha halys
Piercing-sucking mouthparts create dimpled, corky spots on fruit surfaces. Feeds on a huge range of crops and ornamentals. Invasive species that has become a major agricultural pest across NJ.
Best Treatment Window
June - September (crop damage window)
Flea Beetles
Chaetocnema spp.
Tiny jumping beetles that chew small, round 'shot holes' in leaves. Heaviest damage to seedlings and transplants in spring. Larvae feed on roots underground. Can transmit bacterial wilt in some crops.
Best Treatment Window
May - June (seedling stage)
Cucumber Beetles
Diabrotica spp.
Striped and spotted species feed on leaves, flowers, and fruit of cucurbits. Major vector for bacterial wilt, which can kill entire vine crops. Adults emerge as transplants go into the field.
Best Treatment Window
May - June (transplant establishment)
Armyworms
Spodoptera frugiperda
Caterpillars that feed in large groups, 'marching' across fields and consuming everything in their path. Can destroy entire corn fields overnight. Fall armyworm migrates north into NJ each summer.
Best Treatment Window
July - September (migration arrival)
// Field Reconnaissance
Damage Signs
Know what to look for when scouting your fields. Early identification means faster treatment and less crop loss.
Skeletonized Leaves
Leaf tissue eaten between veins, leaving only the vein network. Indicates chewing insects like Japanese Beetles.
Curling & Yellowing
New growth curls inward with yellow discoloration. Often caused by sap-feeding insects colonizing growing tips.
Fruit Entry Holes
Small puncture wounds or bore holes on fruit surfaces. Larvae tunnel inside, causing internal decay and fruit drop.
Honeydew & Sooty Mold
Sticky residue on leaves with black fungal coating. Produced by sap-feeding insects that excrete excess sugars.
Shot-Hole Damage
Numerous small, round holes scattered across leaves, especially on young seedlings and transplants.
Defoliation Trails
Entire leaf sections stripped bare in widening swaths across a field. Sign of group-feeding caterpillars.
Don't Let Pests Destroy Your Yield
Precision drone spraying targets pests where they live with less chemical, less drift, and faster coverage than ground rigs. Schedule a treatment before the damage spreads.
Data Reference
Pest profiles informed by Rutgers Cooperative Extension, USDA APHIS, NJ Department of Agriculture pest advisories, and the AgroPest-12 crop pest detection dataset. Treatment windows calibrated for USDA Zone 7a (South New Jersey).