University of Maryland Extension University of Maryland

College of Agriculture & Natural Resources

Vegetable Pests and Problems - July 2013

Author: 
Jon Traunfeld
early summer vegetable harvest
Click on an image below to enlarge

BMSB

Brown marmorated stink bug nymphs have been present since late June on garden plants in Howard Co. Here's an egg mass hatching on the underside of a 4 ft. tall blackberry primocane. Young nymphs can be controlled with direct sprays of insecticidal soap, horticultural oil, or neem oil.

Photo credit: Jon Traunfeld, UME Home and Garden Information Center

kudzu bug

Kudzu bug has ben found on kudzu in Maryland (Calvert Co., Anne Arundel Co., and Prince George's Co.) Be on the lookout for this new invasive critter in your vegetable garden. It's about the size of a lady bird beetle. The second generation is reported to feed on different types of bean plants. Take photos and report sightings right away.

Photo credit: Alan Leslie, Ph.D.; UM Dept of Entomology

garlic harvest

These hardneck garlic plants are curing naturally on a window screen in a protected location. After 2 weeks cut the leaves off 2 inches above the bulb and trim the roots. Brush off any soil and store in the coolest part of your basement in paper or mesh bags or baskets. Bulbs should store well there through winter and into spring. These techniques will minimize the risk of post-harvest disease problems.

Photo credit: Linda Meyers, UME Master Gardener

iron lady tomato

 Late blight was confirmed on tomato at a single Montgomery Co. location in June. Gardeners should not begin preventative fungicide spraying at this time. HGIC will keep you updated as the season progresses. Speaking of late blight... we planted four 'Iron Lady' tomato plants at HGIC. This is one of the late blight resistant cultivars developed by breeders at Cornell University. The plants are healthy and beginning to fruit. The peduncle (stem supporting the fruit cluster) and pedicels (stems holding individual flowers and fruits) seem longer than typical for tomato?

Photo credit: Jon Traunfeld, UME Home and Garden Information Center

pepper bacterial spot

Bacterial spot on pepper has been commonly observed this spring due to wet weather. This disease infects leaves and fruit and can reduce yield. Remove and discard badly infected leaves. Fixed copper sprays early in the season can effectively control it.

Photo credit: Jon Traunfeld, UME Home and Garden Information Center

zucchini foliage

What's with the weird color pattern in my zucchini? Some gardeners mistake this for powdery mildew. It's just the natural pattern and adds to the plant's beauty.

Photo credit: Jon Traunfeld, UME Home and Garden Information Center
floating row cover

Floating row cover does the job! A small pvc frame supported a light-weight row cover to exclude flea beetles- a major nemesis of eggplant. Once the plants started blooming the cover was removed to allow bumblees access to flowers. The plants are free of any flea beetle feeding after six weeks "undercover".

Photo credit: Jon Traunfeld, UME Home and Garden Information Center

eggplant without floating row cover

Eggplant with floating row cover removed to allow access to pollinators. No flea beetle damage!

 

Photo credit: Jon Traunfeld, UME Home and Garden Information Center

 

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