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September is a crucial month for gardeners in Zone 7 as many pests become more active preparing for the cooler months. Being aware of the most common garden bugs can help you protect your plants and ensure a healthy fall harvest. Here are the top 5 bugs to watch for in September.
1. Aphids
Aphids are tiny, soft-bodied insects that feed on the sap of plants. They are often found on new growth and can cause distorted leaves and stunted plant development. In September, aphids reproduce rapidly, especially in warm, dry conditions.
Signs of aphid infestation include:
- Sticky honeydew on leaves
- Curled or yellowing leaves
- Presence of small green, black, or white insects
2. Japanese Beetles
Japanese beetles are metallic green and copper-colored insects that feed on a wide variety of plants. They are particularly active in late summer and early fall. Their feeding can skeletonize leaves, leaving only the veins.
To identify Japanese beetles:
- Shiny, metallic appearance
- Feeding damage on leaves and flowers
- Adult beetles are about 1/2 inch long
3. Spider Mites
Spider mites are tiny arachnids that thrive in hot, dry conditions. They feed on the undersides of leaves, causing stippling, bronzing, and leaf drop. Their webs can often be seen on infested plants.
Indicators of spider mite infestation include:
- Fine webbing on plants
- Speckled or bronzed leaves
- Premature leaf drop
4. Cabbage Worms
Cabbage worms, including the imported cabbageworm and cabbage loopers, are common pests on cruciferous vegetables like cabbage, broccoli, and kale. They chew large holes in leaves and can damage entire crops if not controlled.
Look for:
- Green caterpillars on leaves
- Frass (caterpillar droppings)
- Chewed or ragged leaf edges
5. Fall Armyworms
Fall armyworms are caterpillars that appear in late summer and early fall. They can quickly defoliate grasses and vegetable plants. They are characterized by a distinct inverted “Y” shape on their heads.
Signs of fall armyworm presence include:
- Large, green caterpillars with stripes
- Chewed leaves and stems
- Webbing or silk on plants
Monitoring these pests and taking timely action can help protect your garden throughout September. Regular inspection, encouraging beneficial insects, and using organic controls when necessary will keep your Zone 7 garden healthy and productive.