Botany - (ebook) - IPM Series Houseplants

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2024-11-24 4 1 33.55KB 4 页 5.9玖币

Educating People To Help Themselves

Home & Garden Mimeo # HG60 IPM Series: Houseplants

Local Governments - U.S. Department of Agriculture Cooperating

The University of Maryland is equal opportunity. The University’s policies, programs, and activities are in conformance with pertinent Federal and State laws and regulations on nondiscrimi-

nation regarding race, color, religion, age, national origin, sex, and disability. Inquiries regarding compliance with Title VI of the Civil Rights Act of 1964, as amended: Title IX of the Educational

Amendments; Section 504 of the Rehabilitation Act of 1973; and the Americans With Disabilities Act of 1990; or related legal requirements should be directed to the Director of Personnel/Human

Relations, Office of the Dean, College of Agriculture and Natural Resources, Symons Hall, College Park, MD 20742.

Symptoms Possible Causes Controls/Comments

Overwatering or lack of water: overwatering can

cause root rots. Healthy roots should be light

colored and firm.

Various root rots: pull plant out of the pot and

observe roots for discoloration. Diseased roots

will appear dark and soft.

Stem cankers: discolored areas on stem.

Aphids: small soft bodied insects found on leaves,

stems and flower buds.

Spider mites: minute pests that feed on lower leaf

surfaces, webbing may be visible.

Mealybugs: white cottony insects.

Whiteflies: adults are tiny white insects that fly

from the plants when disturbed. Immature stages

found on lower leaf surfaces.

Brown soft scale and hemispherical scale: raised

black or brown bumps on leaves and stems.

Root rots: discolored and softened roots.

High soluble salts

Excessive light or sunburn

Spider mites: minute pests that feed on lower leaf

surfaces, webbing may be visible.

Water spots, sunburn, various fungi, bacteria.

Cold Injury: symptoms may continue for up to a

week after exposure.

Use a well drained, peat based potting media.

Severely damaged plants should be discarded.

Remove diseased plants from their pots, cut out

infested portions (rotten), and replant remaining

healthy sections. Take cuttings and root them in

sterile potting mix.

Prune out affected areas.

Regularly rinse plants with water to keep down

pest problems. Use a registered houseplant spray

to control pests. Plants damaged by heavy insect

or mite feeding can be injured by insecticidal

sprays. Severely damaged plants should be

discarded. Remove diseased plants from their pots,

cut out portions (rotten), and replant remaining

healthy sections. Take cuttings and root them in

sterile potting mix.

Leach soil at least three times with pot volume of

fresh water

Acclimate plants slowly to higher light intensities.

Regularly rinse plants with water to keep down

spider mite problems. Use a registered houseplant

spray to control mites. Plants damaged by heavy

mite feeding can be injured by insecticidal sprays.

Severely damaged plants should be discarded.

Remove spotted leaves and improve air circulation

for leaf diseases.

Protect plants from temperatures below 50° F.

Plant wilting

Leaf yellowing, foliage

fades, yellows browns

or wilts

Bleached or whitened

leaves

Fine stippling

Leaf spots and leaf

blotches

Leaf or shoot

Blackening

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Botany - (ebook) - IPM Series Houseplants

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