Holiday Schedule

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TPDDL will be closed from 1/2 day November 27-29th, 2019. Please refrain from sending samples during the week of November 25th to ensure your sample will arrive during our normal business hours. We will resume business on Monday, December 2nd.

If You Have Grass, Read This!

Grass symptomatic of Take-All Patch

Written by Taylor Duke — TPDDL Student Worker; Edited by Hannah Ayala — Extension Assistant If you’ve been noticing brown patches in your lawn lately, it’s most likely infected by the pathogen commonly known as Take All Patch. Take All Patch is caused by the soil-borne fungus Gaeumannomyces graminis var. graminis, or as we like to call it here in the lab, “Ggg”. The season of Ggg is upon us and we have been receiving lots of grass samples in the lab that are positive for this pesky fungus. Ggg… Read More →

You Either Lichen or You Do Not Like Em

Lichen on tree branch

Written by Hannah Ayala — Extension Assistant Have you ever seen a crusty object or a thin layer growing on your trees or rocks? We’re here to tell you NOT to panic. It might just be lichen, which is not completely a fungi or a bacteria. Lichens are actually made up of a symbiotic relationship between fungi and green algae or cyanobacteria (or even all three!). The alga feeds the fungus through photosynthesis, while the algae receives some food and support from the fungus. Lichens commonly grow on limbs,… Read More →

Don’t Let This Disease Leave a Black Spot on Your Roses

Rose leaves exhibiting symptoms of Black Spot

Written by Christina Lanzoni — TPDDL Student Worker; Edited by Hannah Ayala — Extension Assistant Roses are red, leaves are green Oh no they have spots, fungi are seen Valentine’s Day is right around the corner and if you want to give your loved one some live roses, you might want to watch out for this pathogen. One of the most important diseases that affects roses is Black Spot. Black Spot is caused by the fungus, Diplocarpon rosae. While this pathogen is virulent, it does not typically kill the… Read More →

Soft Spot for Succulents

a healthy succulent

Written by Hannah Ayala – Extension Assistant Like all plants, your succulent could be suffering because of a plant pathogen, an insect pest, or an abiotic factor. When it comes to succulents, there are some issues that are more common than others. One of the most common problems we find in samples that come into the lab is caused by overwatering. Cacti and other succulents are mostly found in areas with low rainfall. This means that they store more water than other plants, hence their “puffy” foliage. This… Read More →