Browse

bulbs deer repellents topiary Statues Planters TABLE OF CONTENTS Books Magazines And Videos Bulbs For Other Wildlife For The Birds Fountains Garden Accessories Garden Art Garden Giftware Garden Supplies Home Jewelry Boxes Not Tagged Outdoor Living Planters Repellents Supplies Time Pieces Tools Topiary Water Gardening Weathervanes Yard And Garden

 

Diagnosis Chart Professor Mel 4/8/2004 Diagnosis Chart   Problems Common to Many Annual and Perennial Flowers. SYMPTOMS POSSIBLE CAUSES CONTROLS AND COMMENTS Plants wilt; flowers may drop and leaves may turn yellow Dry soil Water logged soil Transplant shock Supply water Improve drainage Do not transplant in heat of day; water regularly after transplanting Plant wilts and dies Root, stem or corm rot (fungal or bacterial disease) Plant in well drained soil; destroy affected plants; use registered pesticides as soil drench Seedlings wilt; stems turn brown and soft and may be constricted at the soil line Damping off (fungal disease) Plant in well drained soil Use registered fungicide as soil drench Plants fail to flower; foliage looks healthy Wrong season Cool weather Insufficient light Too much nitrogen Immature plants Undersized bulbs Plants have specific day length requirements for flowering Do not plant sun loving plants in shade Do not overfertilize; nitrogen stimulates foliage, not flower, production Biennials and perennials often do not flower the first year Too many small flowers Plants not disbudded Some flowers, e.g. chrysanthemum, need to have some buds removed to produce large flowers Tall, "leggy" plant; stem and foliage pale or yellow Insufficient light Pay attention to light requirements of plants General yellowing of leaves; yellowing lowing may be interveinal; plant may be stunted; no wilting Nutrient deficiency Virus disease Soil test Submit sample for laboratory diagnosis Grayish-white powdery growth on leaves Powdery mildew (fungal disease) Use registered fungicide Pustules containing orange, yellow, or brown powdery substance on leaves Rust (fungal disease) Resistant varieties if available; use registered fungicide Brown, dead spots on leaves Fungal, bacterial, or leaf nematode disease (any of several) Submit sample for laboratory diagnosis Brown, dead areas on margins of leaves Scorch, due to hot, dry weather Salt injury Chemical injury Supply water Do not plant near sidewalks or drives that were deiced in winter Not common in home gardens Flowers wilt or fail to open; grayish mold appears on flowers in moist weather Gray mold (fungal disease) Pick off and destroy affected flowers; use registered fungicide Yellow and green mottle or mosaic pattern on leaves Virus disease (any of several) Remove affected plants; do not touch healthy plants after diseased ones; control insects Tiny white flecks or white interveinal areas on leaves Ozone injury Spider mites Use registered miticide Clusters of insects on stems or undersides of leaves; leaves may be curled or distorted Aphids Use registered insecticide Leaves chewed or completely eaten Various insects Slugs and Sowbugs Submit insect for laboratory identification Use beer bait or commercial slug bait Light colored tunnels or blotches in leaves Leafminers Use registered insecticide Leaves stippled with tiny white spots Spider mites Use registered miticide Tiny white winged insects on undersides of leaves Whiteflies Use yellow sticky boards (smeared with grease) to trap them or use registered insecticide White, cottony masses on leaves or stems Mealybugs Use registered insecticide (chart and information taken from the Texas Agriculture Extension Service)

Rate This Page: 4  3  2  1  0  (current rating: 0.0)

<<PREVIOUS	NEXT>>
list |