Landscape, Ornamentals, Nursery, and Turf Edition

Seasonal updates on ornamental, nursery, and turf pests.
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Been “Burned” By Leafhoppers?

During the past several weeks, significant leafhopper damage has been observed in a few nurseries within central NJ counties. Although there are many species of leafhoppers, the Potato Leafhopper (Empoasca fabae) is probably the most notorious in the northeastern U.S. states. The feeding damage can mimic herbicide injury with distortion & discoloration of foliage. Some of the common deciduous tree hosts include maple, oak, ash, & birch as well as others.  The Potato Leafhopper does not overwinter in NJ, but during the weeks of May is carried-in by upper atmospheric winds from the gulf coast states .

Potato Leafhopper & Acer rubrum damage

Potato Leafhopper & “hopperburn” symptoms on Acer rubrum  at a Burlington County Nursery   Photo Credit: Steven K. Rettke of RCE

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Summer Time and the Livin’ Ain’t Easy

Wow, what a difference a few weeks make! I was just checking out our nematode post from earlier this season and it started with comments on how mild the weather has been. There is nothing like a foot of rain and a couple weeks of 95+ºF heat to change our tune.

Lance nematode damage. Photo: Joe Gulotti, Caveliers Country Club

Lance nematode damage. Photo: Joe Gulotti, Cavaliers Country Club

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NJDA Plant Laboratory Offers Growers Mycotoxin Testing

The recent stretch of unusual rainy weather raises the potential of mycotoxin contamination in small grains, and other field or forage feed crops. Grain growers may be affected by price discounts and/or restricted markets. Mycotoxin contamination in animal feed and forage can lead to feed refusal, reduced productivity (reduced production of eggs, milk, and weight gain), reproduction problems (disrupted heat cycles, early embryonic death, abortion) impaired health, and in severe cases, death.

The NJ Department of Agriculture’s Division of Plant Industry Plant Laboratory offers concerned growers and producers services to test for mycotoxins: Aflatoxin, DON/Vomitoxin, Fumonisin, Ochratoxin, T-2 Toxin, and Zearalenone.

Sample Submission Form information. For questions or more information, please call (609) 406-6939.

Boxwoods: Now You See Them, Soon You Won’t!

Samples of boxwood infected with the fungus Cylindrocladium pseudonaviculatum, the cause of boxwood blight, have been confirmed by the Rutgers Plant Diagnostic Laboratory and the New Jersey Department of Agriculture Laboratory in recent days. This is the first report of the disease is New Jersey.

Boxwood blight leaf lesion. Photo: Sabrina Tirpak, Rutgers PDL

Boxwood blight leaf lesion. Photo: Sabrina Tirpak, Rutgers PDL

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Singing the Blues

You’ve got to suffer if you want to sing the blues… and some of us in certain parts of the state have been suffering the infernal din of the periodical cicadas since late-May.

Adult periodical cicada. Photo: Kim Greene

Adult periodical cicada. Photo: Kim Greene

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Red, White, and Brown?

Patch that is! Recent weather conditions have driven the fungus Rhizoctonia solani into overdrive. Brown patch has flared up all over the place just in time for our July 4th celebrations!

Brown patch on colonial bentgrass. Photo: Richard Buckley, Rutgers PDL

Brown patch on colonial bentgrass. Photo: Richard Buckley, Rutgers PDL

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