Insect Pests of Sweet Corn Cutworms. Cutworms damage a few plants in most gardens every year, but some gardens are so heavily infested as to warrant control by the grower. Seed-Corn Maggot. Southern Corn Rootworm. Wireworms. Corn Earworm. Fall Armyworm. Japanese Beetles. Insects of Corn Armyworms. Cutworms. European Corn Borer. Nematodes. Northern and Western Corn Rootworms. Seed Corn Maggot. Potato Stem Borer and Hopvine Borer. Slugs. Corn Diseases Corn Diseases (Home) Anthracnose. Bacterial Leaf Streak. Bacterial Stalk Rot. Common Rust. Fusarium Stalk Rot. Fusarium Root Rot. Gray Leaf Spot. Apply five drops of corn oil or mineral oil to the silks on each ear of corn. Apply the oil to the silks only after they begin to turn brown. The browning of the silks indicates that pollination has occurred. The oil will create a barrier that will deter insects from laying eggs in the ear of corn.
The corn flea beetle is a tiny pinhead-sized [1/16 inch (1. 6 mm) in length] black insect with thickened hind legs that enable it to leap considerable distances when disturbed.
Description: Adult beetles are about 3/16 of an inch long with a grayish or brownish color pattern. They are usually covered with soil particles, giving them a dusty appearance. Damage Symptoms: Beetles feed on the edges of leaves and stems, producing notched holes in the leaves. Incidence: May, on seedling corn.
White vinegar is also known to kill pesky pantry weevils. After rinsing your shelves with soapy water, wipe them down with white vinegar to prevent a future infestation from occurring. Removing weevils from your pantry is an extensive process.
The corn earworm, also known as the Tomato Fruitworm, is the most devastating pest of corn in the U. S. Although the corn earworm's favorite food is corn, it will also eat tomatoes and cotton. Adult corn earworm moths are light to dark brown in color with green eyes.
Cutworms are moth larvae that hide under litter or soil during the day, coming out in the dark to feed on plants. A larva typically attacks the first part of the plant it encounters, namely the stem, often of a seedling, and consequently cuts it down; hence the name cutworm.
Spray or inject silks weekly with Beneficial Nematodes to control larvae. If corn earworms persist, apply Safer Garden Dust (Bacillus thuringiensis) or Monterey Garden Insect Spray (Spinosad) to silks at 5-10% formation and continue weekly until tassels turn brown.
A formulation of 1 part Btk or Neem with 20 parts oil is recommended. Apply 5 drops (0. 5 ml) from an eyedropper directly to the top of each ear. Timing is critical. Spray when silks have reached their full length and began to wilt and turn brown (this is 5–6 days after 50% of the corn has begun to show silks).
Choose a food that the beetles particularly like, such as banana or melon. You can also use vinegar, stale beer or molasses, water, or yeast mixture. Apply a little bit of Malthion or another effective pesticide to the food item. Change the bait every 3 to 4 days and keep it out of the reach of pets and children.
An Unavoidable Surprise in Organic Corn: Worms! Finding a corn earworm while shucking an ear of corn is a nasty surprise, but the corn itself is fine to eat. Just discard the worm and cut off the affected section of the ear before using it.
Inspect crops weekly during the vegetative stage, and control if more than 10 leafhoppers/plant and wallaby ear symptoms are present. Maize thrips attack seedling and vegetative growth stages. Thrips in the whorl can stop the growth of small plants.
To protect corn from earworms, you must keep them from entering the tip of the husk. You can do this by wrapping a rubber band around the tip of the ear. To protect corn from earworms, you must keep them from entering the tip of the husk. You can do this by wrapping a rubber band around the tip of the ear.
SLUG DAMAGE In years when slugs are thriving they can often cause immense damage to young and not so young sweetcorn plants. They eat the leaves and the damage they cause is often mistaken for other pests because it is unlike the damage caused normally by slugs.
Baking soda sprinkled around the plants will repel and kill the ants, depending on what species of ants are in your garden. You also can use a mixture of borax (1 cup), sugar (2/3 cup) and water (1 cup). Soak some cotton balls in the solution and place them where the ants are active.