See the attachment for this week’s Virginia Potato Disease Advisory. Thanks
Steve Additional information: vpdamay32012-doc
Tag Archives: Urgent News
Late Blight information
As a follow up to our previous email on late blight being found in our region, I wanted to share a recent VCE publication on this potentially devastating disease of potato and tomato. Additional information: anr-6-pdf-pdf
Late Blight found on potato in Camden, NC
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
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