Pest & Disease Control for Ornamental Grasses

Every plant has the future potential for disease and insect damage. Factors such as location and weather will play a part in which issues your plants encounters. If available, disease-resistant varieties are the best option for easy care; and for all types of plants, proper maintenance (such as watering, pruning, spraying, weeding, and cleanup) can help keep most insects and diseases at bay.

NOTE: This is part 7 in a series of 10 articles. For a complete background on how to grow ornamental grasses, we recommend starting from the beginning.

Oedema

Occurs when roots take up water faster than it can be used. Forms tiny swollen blister like areas on leaves.
Natural Control – Avoid over watering, improve the flow of air over the leaves.

Control

  • Consult County Extension Agent

Nematodes

Small, worm like insects that feed on roots and foliage depending on the insect. Root feeders cause above ground symptoms, foliage loses its luster and wilts. If prolonged root stress may result in yellowing and eventual loss of foliage. Foliage feeders produce lesions on leaves.

Natural Control

  • Select plant that are suitable to your area and are pest free.

Other Control Options

  • Consult County Extension Agent

Powdery Mildew

Whitish-gray powdery mold or felt like patches on buds, young leaves and twigs. Leaves may crinkle and curl upward. New shoots are stunted.

Natural Control

  • Remove and destroy fallen leaves and other debris.

Other Control Options

  • Consult County Extension Agent

Foliar Rust

Disease appears as orange or brown spots, especially during warm, humid conditions.

Control

  • Consult County Extension Agent
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