Category Archives: Pest Group

Late Blight found on potato in Camden, NC

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Late blight was found on a commercial potato field in Camden Co., NC this week. Confirmation was made today by Dr. Pat Phipps at the TAREC based upon samples from this field. This outbreak is close enough to be considered a threat to the SE Virginia and the Eastern Shore of Virginia. We will have more information in our potato report tomorrow, but, based upon this news growers should consider treating their potato and tomato fields with a preventative fungicide such as chlorothalonil. If you have any questions feel free to contact me.
Steve

Controlling brown marmorated stink bugs in sweet corn

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I was contacted recently by a VCE Agent in Frederick Co. Mark Sutphin about my recommendations for stink bug bug control in sweet corn. Frederick Co., VA is one of the counties that has very high densities of the invasive brown marmorated stink bug. After sending him my reply, I thought that others in Virginia may also benefit from this information. So here it is below:

Fortunately for sweet corn producers, unlike tree fruit growers, BMSB should not cause any drastic changes in chemical control strategies unless the grower is relying primarily on transgenic Bt sweet corn for worm control.
Bt will not control stink bugs. Most of the insecticides that growers are already spraying on sweet corn should control BMSB. These include the following below:

beta-cyfluthrin – 1.6-2.8 fl oz/A Baythroid XL
bifenthrin – 2.1-6.4 fl oz/A Bifenture (or Brigade, Sniper, or OLF) Not labeled in coastal counties
chlorpyrifos 1-2 pts/A Lorsban 4E (or OLF)
chlorpyrifos + gamma-cyhalothrin – 13-26 fl oz/A Cobalt
cyfluthrin – 1.6-2.8 fl oz/A Tombstone (or OLF)
gamma–cyhalothrin – 2.56-3.84 fl oz/A Proaxis
lambda-cyhalothrin – 1.28-1.92 fl oz/A Warrior II or 2.56-3.84 fl oz/A Lambda-Cy (LambdaT, Silencer, or OLF)
lambda-cyhalothrin + chlorantraniliprole – 6-9 fl oz/A Voliam xpress
methomyl – 0.75-1.5 pts Lannate LV
permethrin – 4-8 fl oz/A Permethrin 3.2EC (Perm-UP, Pounce 3.2EC or OLF)
zeta-cypermethrin – 2.24-4 fl oz/A Mustang MAX (or OLF)
zeta-cypermethrin + bifenthrin-Not labeled in coastal counties 4.5-11.2 fl oz/A Hero EW

Click More News to download a copy of the insecticide performance report based on our research on vegetable crops in Virginia in 2011.
In the western portions of Virginia, probably applications twice per week during silking and until harvest should control them even under heavy pest pressure. In eastern counties, insecticide applications at least 3 times per week are probably needed to control both corn earworm and the BMSB.

Best regards,
Tom
Additional information: summary-of-insecticide-performance-on-bmsb-nov2011-docx

Luna Tranquility now Labeled for use in Virginia on Potato

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Luna Tranquility is a new fungicide from Bayer CropScience and has just received approval for use in Virginia. On the vegetable front, Luna Experience is only labeled on potato currently for control of early blight primarily. Luna Tranquility is also labeled for use on apples. Please let us know if you have any specific questions. The label can be found at the attached link. Additional information: lunatran-pdf

Luna Experience labeled for use on Watermelon in Virginia

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Luna Experience is a new fungicide from Bayer CropScience and has just received approval for use in Virginia. On the vegetable front, Luna Experience is only labeled on watermelon currently for control of gummy stem blight, powdery mildew and others. Luna Experience is also labeled for use on grapes and select tree nut crops. Please let us know if you have any specific questions. The label can be found at the attached link. Additional information: lunaexperience-pdf

Fontelis Fungicide now Labeled for Use in Virginia

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Fontelis, a new fungicide from DuPont, is now received state registration and will be available for use on a number of vegetable and field crops in 2012. The label is attached and should you have any specific questions please let us know as we have had tested this material for several years. Thanks, Steve (srideout@vt.edu). Additional information: fontelislabel-pdf