Search Results for: basil downy mildew

August 20, 2019

Vegetable Twilight Research Tour Tomorrow

Wes, Michelle and I invite you to our annual open house plot tour tomorrow evening at RAREC!

Wednesday, August 21, 2019, 4:00pm
Rutgers Agricultural Research & Extension Center
(meet at the shelter near the parking lot)
121 Northville Rd., Bridgeton, NJ (Upper Deerfield)

  • Specialty Crop Evaluations – Albert Ayeni, PhD, Ethnic Crop Research Specialist, Rutgers University and Tom Orton, PhD, Specialist in Vegetables
    • Exotic peppers (Habaneros, Superhots, Poblano types, Jalapenos, Sweet minibells and African Birdeyes)
    • Tropical Spinach
    • Tigernuts (Conventional vs. Organic plots)
    • Roselle (Conventional vs. Organic)
    • Asian Cucurbits (Trellised vs. Non-trellised)
    • Elephant Ear Demo
    • Sweetpotatoes for Leaf Production (Vine vs. tuber propagule)
    • Fluted pumpkin (Conventional vs. Organic)
  • Evaluation of Yacon as a Potential New Specialty Crop for New Jersey Farmers – Rick VanVranken, Rutgers Cooperative Extension of Atlantic County and Peter Nitzsche, Rutgers Cooperative Extension of Morris County
  • Evaluation of Bell Pepper Varieties and Breeding Lines for Bacterial Leaf Spot and Phytophthora Blight Management – Wes Kline, PhD, Rutgers Cooperative Extension of Cumberland County
  • Weed Control Options for Cucurbits – Thierry Besancon, PhD, Extension Weed Specialist for Specialty Crops
  • Basil Downy Mildew Fungicide Control Trial – Andy Wyenandt, PhD, Specialist in Vegetable Pathology
  • Cucurbit Powdery Mildew Control with Fungicides – Andy Wyenandt, PhD, Specialist in Vegetable Pathology
  • Basil Downy Mildew Variety Evaluations – Andy Wyenandt, PhD, Specialist in Vegetable Pathology
  • Organic and Conventional Basil Downy Mildew Control Programs Comparing New Rutgers DMR Lines and Downy Mildew Susceptible Lines. – Andy Wyenandt, PhD, Specialist in Vegetable Pathology
  • Managing Phytophthora Blight in Peppers With Fungicides – Andy Wyenandt, PhD, Specialist in Vegetable Pathology
  • Evaluation of Five Sweet Corn Varieties: non-Bt, Bt, and Bt+VIP for Resistance to Corn Earworm, Fall Armyworm and European Corn Borer – Joe Ingerson-Mahar, PhD, Vegetable IPM Coordinator

Pesticide credits have been requested.

Filed Under: Commercial Ag Updates, Vegetable Crops
August 2, 2019

Vegetable Disease Update – 8/2/19

  • Cucurbit downy mildew was been reported on pumpkin in Warren County this week. All cucurbit growers are encouraged to scout their fields on a regular basis and to initiate a downy mildew specific fungicide program. This is the first report of CDM on pumpkin in New Jersey this growing season. Fungicides that are specific to CDM should be included in weekly fungicide maintenance programs for cucurbit powdery mildew control. To track the progress of CDM in the US please visit the CDMpipe forecasting website here.
  • There have been a few reports of Southern blight (Sclerotinia rolfsii) on tomato and pepper. Southern blight is much more common in vegetable areas south of the state where summer temperatures remain hotter (above 90°F) for longer periods of time. Like white mold, caused by Sclerotinia sclerotiorum, it can survive in the soil for many years. Symptoms of Southern blight include infection at the base of the stem at the soil-line. The resulting infection will girdle the plant causing wilt and death. The fungus will produce white, cottony mycelium and very small, spherical sclerotia which are often have a tannish, brown color.
  • Cercospora leaf blight has been reported in a newly planted asparagus field.
  • Corn leaf rust has been reported in northern New Jersey.
  • Basil downy mildew has been reported in New Jersey on BDM susceptible sweet basil lines. All basil growers are encouraged to initiate a BDM specific fungicide program even when using DMR varieties. To track the progress of BDM in the US please visit here.
  • Phytophthora blight has been reported in pepper and other crops.
  • Bacterial leaf spot has been widely reported in pepper plantings.
  • The 2019 Fungicide Resistance Management Guide for Vegetable Crops in the mid-Atlantic Region is now available for FREE online.
  • For more information on controlling these and other important diseases please see the 2019 Mid-Atlantic Commercial Vegetable Production Guide. The guide is available for FREE online by following the links on the Plant and Pest Advisory website. Hardcopies of the 2019 guide can be purchased through your local county Extension office.
Filed Under: Vegetable Crops
July 17, 2019

Vegetable Disease Update – 7/17/19

  • Cucurbit downy mildew has been reported on butternut squash in Gloucester County this week. All cucurbit growers are encouraged to scout their fields on a regular basis and to initiate a downy mildew specific fungicide program. This is the first report of CDM in butternut squash in New Jersey this growing season. To track the progress of CDM in the US please visit the CDMpipe forecasting website here.
  • There have been no reports of late blight in the region to date. Phytophthora nicotianae has been reported in the region in recent weeks. Symptoms caused by P. nicotianae look similar to late blight. If you suspect late blight on potato or tomato please contact your county Extension office.
  • Basil downy mildew has been reported in southern New Jersey on BDM susceptible sweet basil lines. All basil growers are encouraged to initiate a BDM specific fungicide program. To track the progress of BDM in the US please visit here.
  • Black leg symptoms have been reported on potato vines. Growers should dig up a few hills with aerial black leg symptoms to see if bacteria has worked its way into developing tubers. If tubers “stink” then traditional black leg is present. If rotten tubers are present and have no smell, please contact your County agent so samples can be collected and tested.
  • Bacterial leaf spot has been reported in tomato and pepper.
  • Phytophthora blight has been reported in pepper and other crops.
  • Angular leaf spot has been reported on cucurbit crops. Click here for a nice review of diagnosing angular leaf spot, bacterial leaf blight, downy mildew, and anthracnose in cucurbit crops from Dr. Beth Gugino, vegetable pathologist, at Penn State.
  • Cucurbit powdery mildew has been reported. Apply and rotate fungicides that are specific for CPM control.
  • The 2019 Fungicide Resistance Management Guide for Vegetable Crops in the mid-Atlantic Region is now available for FREE online.
  • For more information on controlling these and other important diseases please see the 2019 Mid-Atlantic Commercial Vegetable Production Guide. The guide is available for FREE online by following the links on the Plant and Pest Advisory website. Hardcopies of the 2019 guide can be purchased through your local county Extension office.
Filed Under: Vegetable Crops
July 8, 2019

Vegetable Disease Update – 7/8/19

  • Cucurbit downy mildew has been reported cucumber in Salem County. All cucumber growers are encouraged to scout their fields on a regular basis and to initiate a downy mildew specific fungicide program. This is the first report of CDM in New Jersey this growing season. To track the progress of CDM in the US please visit the CDMpipe forecasting website here.
  • There have been no reports of late blight in the region to date. Phytophthora nicotianae was reported on potato on the eastern shore of Virginia a few weeks ago. Symptoms caused by P. nicotianae look similar to late blight. If you suspect late blight on potato or tomato please contact your county Extension office.
  • Basil downy mildew has been reported in southern New Jersey on BDM susceptible sweet basil lines. All basil growers are encouraged to initiate a BDM specific fungicide program if not already done so.
  • Black leg symptoms have been reported on potato vines. Growers should dig up a few hills with aerial black leg symptoms to see if bacteria has worked its way into developing tubers. If tubers “stink” then traditional black leg is present. If rotten tubers are present and have no smell, please contact your County agent so samples can be collected and tested.
  • Bacterial leaf spot has been reported in tomato and pepper.
  • Phytophthora blight has been reported in pepper.
  • The 2019 Fungicide Resistance Management Guide for Vegetable Crops in the mid-Atlantic Region is now available for FREE online.
  • For more information on controlling these and other important diseases please see the 2019 Mid-Atlantic Commercial Vegetable Production Guide. The guide is available for FREE online by following the links on the Plant and Pest Advisory website. Hardcopies of the 2019 guide can be purchased through your local county Extension office.
Filed Under: Vegetable Crops
June 19, 2019

IPM Update 6/19/19

Sweet Corn

European corn borer (ECB) moths catches have declined to very low levels over the past week and no map will appear in this edition.  The first flight is complete.  Feeding percentages have stabilized, and no new feeding should occur until the second flight arrives.

Growers should continue to scout whorl and pre-tassel stage plantings weekly and consider treating when infested plants exceed 12% in a 50 plant sample.  As plantings proceed to the pre-tassel stage, ECB larvae may be found in emerging tassels.  It is a good idea to treat individual plantings as they move into the full tassel/first silk stage one time.  This eliminates any ECB larvae that have emerged with the tassels as they begin to move down the stalk to re-enter near developing ears.

Useful insecticides for this particular application include synthetic pyrethroids (IRAC Grp 3), spinosyns (including OMRI approved Entrust) IRAC Grp 5), and diamides such as Coragen (IRAC Grp 28) or materials such as Besiege which include the active ingredient in Coragen.  Synthetic pyrethroids alone should NOT be used for corn earworm (CEW) protection on silking corn.  Control with these materials is very inconsistent.

The highest nightly trap catches of ECB for the week ending 6/19/19 are as follows:

Crosswicks   1 Milltown   1
Milford   1 South Branch   1

 

Scattered corn earworm (CEW) moths continue to be captured in southern NJ blacklight traps through early this week (see blacklight map at left) although these catches have declined since last week.   Early plantings, now silking, are at risk of infestation from this pest.

In the CEW pheromone trap network, catches have also declined but remain highly variable, with higher numbers in the south, and very low activity in northern NJ (see pheromone map  below at right). The green area on the pheromone trap map indicates a 4-5 day silk spray schedule. Blue areas represent a 5-6 day schedule, and white areas are 6-7 day.  There are far fewer CEW pheromone traps than blacklights, and the resulting map has much broader color bands as a result.  It should also be noted that the pheromone traps are much more sensitive than blacklights.  Therefore, the number of moths caught in pheromone traps required to generate a specific spray interval is much higher than the number caught in blacklight traps.   It must be stressed that there is high variability in these catches, and growers should consult with their IPM practitioner on recommended spray schedules.

[Read more…]

Filed Under: Organic Production, Vegetable Crops
May 21, 2019

Vegetable Disease Update – 5/21/19

  • The cool, damp weather the past week has been ideal for downy mildew development on spring crops. Growers are advised to scout fields on a regular basis
  • The heavy rains and damp, cool weather have been ideal conditions for early-season damping off caused by Pythium. Growers should continue to scout on a regular basis and remain proactive in their fungicide programs as long as current weather patterns continue.
  • Cercospora leaf spot on swiss chard has been reported.
  • Bacterial leaf spot of parsley has been reported.
  • Basil downy mildew has been reported in greenhouses in North Carolina.
  • Cucurbit downy mildew has been reported as far north as St. Lucie County, Florida.
  • For more information on controlling these and other important diseases please see the 2019 Mid-Atlantic Commercial Vegetable Production Guide. The guide is available for FREE online by following the links on the Plant and Pest Advisory website. Hardcopies of the 2019 guide can be purchased through your local county Extension office.
Filed Under: Vegetable Crops