Summer Garden Pest Calendar: Month-by-Month Prevention Guide
Garden pests arrive in predictable waves tied to temperature and day length. Prevent infestations before they start.
## June: The First Wave
### Japanese Beetles (Early-Mid June)
- Damage: Skeletonized leaves on roses, grapes, beans
- Prevention: Milky spore in fall, row covers, hand-pick in morning
- Treatment: Neem oil spray
### Squash Vine Borers (Mid-June)
- Damage: Sudden wilting of squash vines
- Prevention: Wrap stems with foil, plant butternut (resistant)
- Treatment: Bt injection, slit and remove borer
### Colorado Potato Beetles (Late May-Early June)
- Damage: Defoliation of potatoes, eggplant
- Prevention: Rotate location, row covers, straw mulch
- Treatment: Spinosad spray
## July: Peak Season
### Tomato Hornworms (Early July)
- Damage: Massive overnight leaf consumption
- Prevention: Till in fall, plant dill for parasitic wasps
- Treatment: Hand-pick or Bt spray
### Spider Mites (Mid-July, hot/dry weather)
- Damage: Stippled yellowing leaves, fine webbing
- Prevention: Keep watered, mist foliage, diverse plantings
- Treatment: Water blast, insecticidal soap
### Cabbage Worms (Continuous)
- Damage: Holes in brassica leaves
- Prevention: Row covers, nasturtium trap crop
- Treatment: Bt spray
### Aphids (Population Explosion)
- Damage: Curled leaves, honeydew, sooty mold
- Prevention: Avoid excess nitrogen, attract ladybugs
- Treatment: Water blast, insecticidal soap
## August: Pressure Cooker
### Squash Bugs (Peak)
- Prevention: Check for bronze eggs, board traps at night
- Treatment: Neem oil, pyrethrin
### Corn Earworms
- Prevention: Mineral oil on silk tips
- Treatment: Bt into ear tips
### Whiteflies (Late July-August)
- Prevention: Yellow sticky traps, remove infested leaves
- Treatment: Insecticidal soap, neem oil
## September: Last Push
### Fall Armyworms
- Prevention: Pheromone traps, healthy lawn
- Treatment: Bt for young larvae, spinosad for older
### Stink Bugs
- Prevention: Seal entry points, remove host plants
- Treatment: Hand-pick, kaolin clay spray
## Year-Round Prevention
1. Crop rotation
2. Companion planting
3. Beneficial insect habitat
4. Clean cultivation
5. Healthy soil
6. Diversity over monoculture
## Emergency Kit
- Floating row covers
- Neem oil concentrate
- Bt (Bacillus thuringiensis)
- Insecticidal soap
- Diatomaceous earth
- Spinosad
- Yellow sticky traps
- Dedicated spray bottle