Category Archives: Pests & Problems

Foot & Root Rot

Also known as Basal Rot Physical Description   Species & Taxonomy Kingdom: Phylum: Class: Order: Family: Genus Species: Fusarium spp. Plants Affected Tomatoes, cucumbers, and melons are frequently affected soft-stemmed plants, especially seedlings and cuttings, are commonly affected, but most annual, biennial, and herbaceous perennial plants may show symptoms Signs & Symptoms Whole Plant deterioration of […]

Aster Wilt (stub)

Quick Intro Physical Description   Species & Taxonomy Kingdom: Phylum: Class: Order: Family: Genus Species: Fusarium oxysporum f. sp.  callistephi Plants Affected  Aster family plants: aster daisy sunflower lettuce artichokes marigold chrysanthemums dahlias zinnias echinacea yarrow Plants Unaffected   Geographical Range   Signs & Symptoms Whole Plant rapid wilting of the plant, often followed by death stem […]


Symphylans are very small, white, many segmented organisms that you may see in your soil when you pull up a struggling plant. You will notice them darting and scurrying quickly about the root ball or seedling plug. They are also known as symphlans, or “symphys”, pseudocentipedes, or garden centipedes, even though they are not centipedes. They are […]

Fungal Diseases

Common Fungal Diseases: Aster Wilt Cabbage Yellows Downy Mildew Foot Rot or Root Rot Fungal Canker Fungal Leaf Spots Alternaria Cercospora Coccomyces Coryneum Cristulariella Mycosphaerella Phyllosticta Physalospora Venturia Fusarium Wilt Gladiolus Corm Rot Narcissus Basal Rot Peach Leaf Curl Phytophthora Powdery Mildew Pythium Rust Snow Mold Turf Drought Verticillium Wilt Transmission: AHSP&D-72: Most fungal infections […]

Cucumber Beetles

Also referred to as: Spotted Cucumber Beetles, Striped cucumber beetles, western striped cucumber beetle, southern corn rootworm, Western corn rootworm beetles Acalymma spp., Diabrotica undecimpunctata Physical Description: Light green to yellow little beetles with stripes or spots (very much like a ladybug, but with yellow-green instead of red background). Striped cucumber beetles can overwinter in […]

Aster Yellows

This disease is caused by a microorganism, a mycoplasma-like organism (MLO), which is spread by the 6-spotted leafhopper, aka aster leafhopper(Macrosteles quadrilineatus). The leafhoppers pick it up while sucking the sap of diseased plants. This aster disease hits in early summer and affects about 200 species of ornamentals, vegetables, and non-woody fruit plants. It’s a common disease of many annuals, […]


Sap-sucking insects frequently found in vegetable and ornamental gardens, sometimes causes leaf to become distorted, or reduces crop production. Viruses can also be transmitted by whiteflies. Google images Physical Description clouds of small white insects fly up when plant is disturbed Tiny oval yellowish to green scale-like insects fasten to leaf undersides Sap sucking insects  […]

Tomato Russet Mite

Don’t grow tomatoes near petunias or potatoes, which are hosts for this mite. Physical Description Very tiny mite – must use at least 20x hand lens to see. These mites are whitish yellow with pear-shaped bodies, move very slowly Species & Taxonomy Kingdom: Phylum: Class: Order: Family: Genus Species: Lifecycle   Plants Affected Tomatoes  Plants […]

Pests, Diseases & Problems of Tomatoes – by Symptom

Whole Plant Plant has poor vigor and reduced yields Root knot nematode (foliage will also yellow and turn brown from the bottom up; may also look wilted Leaves Yellowing of lower leaves between veins (veins remain green) magnesium deficiency (could be caused by overwatering, which locks up the magnesium in the soil) Irregular yellow blotches […]

Cabbage Yellows

Yellows of cabbage is a fungal wilt disease caused by Fusarium oxysporum Please see the full article, “Fusarium Wilt“, for information on symptoms and treatment. Species & Taxonomy Kingdom: Phylum: Class: Order: Family: Genus Species: Fusarium oxysporum Plants Affected  infects only plants in the cabbage family (Brassicaceae): cabbage mustards cauliflower broccoli turnips radish horseradish Signs & Symptoms Whole […]