Plant secondary metabolites play an...
- Cut worms are larvae of moths. The larvae are called surface caterpillars.
- Larvae feed on plant at night by chewing.
- Cut off young seedlings at or slightly above or below the soil line.
- They cause significant seedling damage.
- During the day, they are found hiding in holes under debris or under thatch.
Eggs
- lay on humus or stones or weeds
- about 2000 eggs are laid by a female moth.
Larvae
- larvae called cut worms (caterpillars) hatched out within 2-6 days.
- 1 - 1.5 inches long
- comes out in rain sawer and hide in soil (2-3 inches) at day.
- They remain as larvae for 20-35 day.
Pupa
- The life of pupa is 30 days.
Adult
- Adult moth comes out in April-May.
Control of cut worms
Several cultural practices may offer some degree of control:
- Plow and fallow fields in mid- to late summer to prevent the laying of eggs.
- Plow in the fall to expose the larvae or deeply bury the pupae.
- Cultivate fields in the spring after vegetation has appeared and grown a few inches, then delay seeding to starve the cutworms.
- Plan rotations to avoid row or hill crops following a grassy sod. Plow sod fields in late summer or early fall the year before planting.
- Cultivate frequently to injure and expose hiding cutworms to predators.
- The construction of ditches and dusty furrows may interrupt armyworms.
- Place foil or paper wraps or cardboard collars around transplants; extend a few inches into the soil and several inches up the stem.
- Dig in the soil around damaged or adjacent plants in the row; find and destroy the cutworm.
- Plant a thick "trap crop" of sunflower, a favored host, around the perimeter of the Nursery; find and destroy attacking cutworms daily.
Other suggested home remedies
- It include catching and placing toads in the garden, wrapping onion stems around the stems of transplants, placing a ring of moist wood ashes around the plants, and placing a toothpick or 16d nail alongside each transplant stem.
- Chemical treatments are available as either homemade or commercial poison baits or as insecticide treatments directed to the soil surface or on and around the plants.
- Granular insecticide treatments, applied to protect the seed and developing seedlings from soil insects, are of little, if any, value in controlling cutworms.
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