Training opportunity for Master Gardeners volunteers – a call to action

One of the most robust programs for volunteers is the Master Gardener program in Texas (Texas A&M Agrilife Extension).  This is where folks who are interested in gardening register to take classes from various experts in plants, plant health management and horticulture.  (Check out their website at http://txmg.org ).  To help with some of the continuing …

Tomato Russet Mite

    Last week a tomato sample was diagnosed with tomato russet mites (Aculops lycopersici). These conical-shaped insects, usually translucent and yellowish, cannot be seen without the aid of a 14X hand lens. Russet mites cause damage by feeding on leaves and stems, giving them a greasy or bronze appearance. Infestation normally begins at the …

Leaf Gall Diagnostics

Ever wonder about how some diseases are diagnosed in a plant disease diagnostic lab.  You would be surprised that there are similarities to an ER in the hospital. When a sample arrives at the Plant Clinic, it has to be accompanied with a submission form where there are a bunch of question trying to get …

Perfect conditions for Cercospora

Be on the lookout for Cercospora leaf spot in your landscape plants! Recent weather conditions around the state like cool temperatures and high humidity seem to trigger an increase in Cercospora activity. Check your colorful fall annual bedding plants, including zinnias, hydrangeas, snapdragons and azaleas, for necrotic or purplish, angular leaf spots. A: Cercospora symptoms …

White rust on crucifers

Last week we received some turnip leaves into the lab with white patches on the undersides. After examining the leaves more closely under the dissecting and compound microscopes, we saw that the white patches were actually “rust” pustules containing sporangia. The pathogen, Albugo candida, which causes this disease, white rust, is actually not a true …