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Extension > Agriculture > Crops > Small Grains Production > The Small Grains Field Guide > Section IV: Photographs

Section IV: Photographs

Small grains insects

Aphids in grain head

Aphids in grain head.

Armyworm larvae

Armyworm larvae.

Bird-oat cherry aphids, mothers and daughters.

Bird-oat cherry aphids, mothers and daughters.

Damage from barley thrips

Damage from barley thrips.

Barley thrip adult

Barley thrip adult greatly enlarged; cigar shaped with feathery wings.

Wheat infected with barley yellow dwarf

Wheat infected with barley yellow dwarf. Note discoloration and stunting.

Wheat infected with barley yellow dwarf

Wheat infected with barley yellow dwarf. Note localized patches of plants with yellow flag leaves

Cutworm larvae

Cutworm larvae. Note “C” shape. Larvae curl when disturbed.

Hessian fly adult

Hessian fly adult.

Hessian fly larvae

Hessian fly larvae inside stem. Larval feeding can result in lodging.

Grasshopper damage

Grasshopper damage typically first seen at the edge of fields.

Orange wheat blossom midge larvae

Orange Wheat Blossom Midge larvae (left) and adult (right).

Ladybug larvae

Ladybug larvae (larger inset in photo). One of the most important natural aphid controls.

Ladybug pupae

Ladybug pupae; adults will emerge from these immodle forms. Note larva on right is almost ready to pupate.

Ladybug adult

Ladybug adult; found in large numbers after heading.

Tiny parasitic wasp

Tiny parasitic wasp; another important control of aphids. Female wasps lay their eggs in aphids and the hatching larvae eat the aphid from the inside. They only attack/sting other insects.

Parasitized aphid

A parasitized aphid, called a “mumy.” Note the hole in the aphid’s abdomen. This is where the parasitic wasp exited after it finished developing.

Exit hole of a stalk borer

Exit hole of a stalk borer.

Stalk borer caterpillar still in wheat stem

Stalk borer caterpillar still in wheat stem.

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