Insect Management

Potato leafhopper
Potato leafhopper

Potato Leafhoppers Feeding in Alfalfa Earlier than Normal

May 25, 2016
Potato leafhoppers have been reported in alfalfa in southeastern and northeastern Nebraska. This is somewhat earlier than usual and growers should be alert to potential damage and protecting their alfalfa where numbers indicate treatment thresholds would be met.

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Biological control insects and alfalfa aphids
Biological control insects and alfalfa aphids

Aphids Active in Nebraska Spring Alfalfa

May 6, 2016
Examination of an alfalfa field in northeast Nebraska this week revealed some alfalfa weevil larvae (under threshold at just over one larvae/sweep) and a surprisingly high population of pea aphids. This was somewhat unexpected due to the recent winds and rain which often dislodge aphids from plant stems, resulting in reduced pea aphid numbers. See story for biocontrol information and aphid scouting and treatment recommendations.

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alfalfa weevil
Alfalfa weevils can cause serious yield loss in first cutting alfalfa

Scout for Alfalfa and Clover Leaf Weevils

May 5, 2016
Guide to identifying and managing alfalfa and clover leaf weevils in alfalfa. While research in northeast Nebraska has shown that clover leaf weevil larva feeding does not cause yield reduction to first cutting alfalfa, alfalfa weevil feeding can cause severe losses to yield and quality of the first cutting. This is why it's important to correctly identify the type of weevil feeding causing damage.

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Photo of wireworms
Wireworms

Scout Emerging Corn for Insects; Don't Assume Protection

April 27, 2016
As corn begins to emerge, be alert to the potential for damage from early season insects such as cutworms, wireworms, or white grubs. High risk factors and identification and treatment guides for these major early season insects are included.

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Wheat stem maggot in corn
Wheat stem maggot in corn

Insect Pheromone Trap Reports 2016

Moth traps have been established at 12 sites in northeast, east central, southeast and south central Nebraska to monitor flights of armyworm, black cutworm, and variegated cutworm moths. Find weekly updates in CropWatch:

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