|Green beans||Chemical injury - herbicide|
|Pepper||Bacterial leaf spot* (Xanthomonas spp.)|
|Celery||Early blight (Cercospora spp.)|
|Tomato||Chemical injury - herbicide*|
|Tomato||Adventitious roots girdling* (due to high humidity)|
|Tomato||Leaf mold* (Fulvia fulva)|
|Tomato||Rhizoctonia root rot|
|Tomato||Pythium root rot|
|Tomato||Bacterial leaf spot* (Xanthomonas spp.)|
|Spaghetti squash||Fusarium stem rot|
For the month of July there were 90 samples sub-mitted to the Plant Diagnostic Clinic. Two were for plant / weed identification, 14 turfgrass disease identi-fication and the other 74 were for general plant dis-ease diagnosis. Not included are the countless num-ber of emails, phone calls and walk-ins that trickle or flood in each day. Overall, it has been a steady month with some days busier than others.
The weather has been variable, or perhaps crazy is a better word to describe it. This is the first year I remember wearing a long sleeve shirt on the 4th of July! The cooler weather, especially the low night temperatures, are taking a toll on tomatoes and cu-curbits. Both of these crops like warm temperatures. Cool weather can cause flowers to be aborted and / or poor fruit set and development. Cool tempera-tures coupled with moist conditions in early July also favored powdery mildew, for an early start on pump-kins usually not seen much until late summer.
The table has a list of diseases or issues for vegetables that have been diagnosed for the month of July. Some of the issues we have seen repeatedly, they are marked with an *.
REVISED: November 23, 2015