How to Tell if Corn Has Worms?
To determine if corn has worms, specifically corn earworms, you need to look for distinct signs of damage and the presence of the worms themselves, typically concentrated at the ear's tip.
Key Signs of Corn Earworm Infestation
Corn earworms commonly begin their damage at the tips of corn ears. Regular inspection of your corn plants is essential for early detection.
Here are the primary indicators to look for:
- Chewed Kernels: The most direct sign is damage to the corn kernels. When you pull back the husks, especially near the top of the ear, you will often find kernels that have been chewed or eaten away.
- Worm Excrement (Frass): Look closely for small, dark, granular droppings. This material, called "frass," is the earworm's excrement and serves as a strong indicator of their feeding activity. It is often found among the damaged kernels or within the corn silk.
- Visible Worms: The corn earworms themselves are often present and actively feeding. These are caterpillars that can vary in color, usually found burrowing into the kernels near the ear tip.
- Damaged Husks: In advanced stages of an infestation, corn earworms may chew through the husks. This indicates a more severe presence and makes their activity visible even without manually peeling back the husks.
Where to Check for Worms in Corn
To effectively check for corn earworms, focus your inspection on these specific areas:
- Ear Tips: This is the initial and most frequent point of attack. Gently pull back the husks from the top of the corn ear.
- Corn Silk: Worms often enter through the silk channels. Examine the silk for any signs of feeding or frass.
- Kernel Surface: Carefully inspect the kernels, particularly those at the top of the ear, for any signs of chewing, tunneling, or discoloration.
Visual Cues for Identifying Corn Earworms
Here’s a quick reference table summarizing the signs you might encounter:
| Sign of Infestation | What to Look For |
|---|---|
| Damaged Kernels | Irregularly chewed, hollowed-out, or discolored kernels, primarily at the ear's tip. |
| Frass | Small, dark, pellet-like droppings, often found mixed with silk or on the kernels. |
| Actual Worms | Caterpillars (ranging in color from green to brown with various markings) feeding inside the ear. |
| Hole in Husk | A visible hole chewed through the protective outer husk, signaling a significant infestation. |
By regularly inspecting your corn crop for these specific indicators, you can effectively determine if worms are present. For more information on identifying and managing garden pests, consult reliable resources such as university extension services or trusted gardening guides. Learn more about garden pest management.
