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Asparagus - Diseases, Pests and Problems





Basic Information



Problem: Asparagus Aphids
Affected Area: Entire plant

Description: Green plant sucking insects that stunt fern and reduce plant vigor

Control: Use insecticidal soaps or labeled insecticides


Problem: Asparagus Beetles
Affected Area: Leaf

Description: Adult beetles are 1/4" long, metallic blue to black or orange colored with 6 to 12 spots on their wings. Eggs laid on spears look like shiny black specks. Larvae are olive green to dark gray and 1/2" long. Larvae and grubs feed on foliage reducing leaf area and plant vigor and deforms or defoliates plants. Control: Lady beetles and other predators feed on this pest. Frequent cutting of shoots will afford some control. In heavy infestations, use insecticides labeled for this pest. Adult beetles are 1/4" long, metallic blue to black or orange colored with 6 to 12 spots on their wings. Eggs laid on spears look like shiny black specks. Larvae are olive green to dark gray and 1/2" long. Larvae and grubs feed on foliage reducing leaf area and plant vigor and deforms or defoliates plants.

Control: Lady beetles and other predators feed on this pest. Frequent cutting of shoots will afford some control.


Problem: Root Rot Diseases
Affected Area: Fern tip

Description: Fungal diseases that reduce plant vigor and stands. Tips of ferns turn yellow and die followed by rest of stems and eventually plants. Spears are small and skinny.

Control: Reduce plant stress which may be caused by insects, over-watering, over cutting, drought and weed pressure.


Problem: Asparagus Viruses
Affected Area: Entire plant

Description: Viruses cause plants to decline. Yields are reduced and the plant eventually dies.

Control: Control aphids which may transmit the disease.






Asparagus

Tips

The best stalks are generally 1/2" to 3/4" thick.

 

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