Rutgers University | New Jersey Agricultural Experiment Station | Pesticide User Responsibility

Archives for July 2019

July 10, 2019

Hackettstown Livestock Auction Results for July 9, 2019

This auction sells: lambs, sheep, goats, calves, beef cattle, pigs, rabbits, and all types of heavy fowl. Auctions are held every Tuesday with the first sale beginning at 10:30 am and ending at the last sale 5:30 pm. Hay, straw, grain, and firewood are also for sale.

Farm Fresh Eggs available for purchase by the case (30 doz.) or by the flat (2&1/2 doz.) in the main office Tuesday, Wednesday & Thursday. Also available some Monday’s and Friday’s but please call office first (908)-852-0444.

Click on link for July 9 sale results:

Hackettstown 7-9-19

 

Filed Under: Commercial Ag Updates, Field, Forage & Livestock
July 10, 2019

Vegetable IPM Update 7/10/19

Sweet Corn

Very low numbers of European corn borer (ECB) moths were again captured this past week, but not enough to generate a map image.  These individuals likely represent the onset of a second flight.  New feeding should occur after an increase in adults.

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 7/10/19 are as follows:

Crosswicks   1
Dayton   1
Matawan   1
Sergeantsville   1

[Read more…]

Filed Under: Organic Production, Vegetable Crops
July 9, 2019

Grape Camp 2019

Tuesday, July 30, 2019 (rain date July 31); 4:30-8:00 pm is Grape Camp 2019. This workshop will cover important topics on mid- and late season vineyard management. It will be held at the Rutgers Agricultural Research and Extension Center, 121 Northville Rd, Bridgeton, NJ.

Light fare will be provided. Please call Joan Medany jmedany@co.gloucester.nj.us or call 856-224-8030 if you are planning to attend.

This site is accessible to the physically impaired. If an additional assistance is needed, please contact Hemant Gohil (Program Organizer) at 856-224-8029prior to the meeting.

With Support from the New Jersey Center for Wine Research and Education (NJCWRE).

Filed Under: Wine Grape Tagged With: , , , , , , , , , , , , , , , , ,
July 9, 2019

Managing Root-feeding Pests of Cranberries

If your beds have damage caused by root-feeding insects, you should consider treatment with Imidacloprid (e.g. Admire Pro, Alias 4F, Alias

Damage caused by root-feeding insects

Damage caused by root-feeding insects

2F) after bees are removed. Occurrence of root-feeding insects will manifest by the presence of dead patches (see picture). Pull dead vines and search through the root zone and soil for grubs and worms. Admire Pro (imidacloprid) is labeled for the control of cranberry rootworm, white grubs (Phyllophaga spp.), and other scarabs in cranberries.

White grubs, Phyllophaga spp. There are several species of white grubs that infest cranberries in New Jersey, the most abundant being P. georgiana. Grubs are C-shaped and often found near bog margins. Adults are reddish brown and nocturnal. Grubs attack the cranberry roots; adults have not been reported to feed on cranberries. See pictures of grubs and grub damage in cranberries. The life cycles and abundance of white grub species in New Jersey is not well known. Most likely, Phyllophaga grubs have a 3-year life cycle (based on previous reports and our own observations). Eggs are laid in late-June and July, and will hatch in July. First instars can be found in late-July and August and turn into second instars by the end of August-September. The second instar grubs will overwinter. These grubs will feed the following year until June and molt to third instars, which will overwinter. The following year, the third instars will feed for some time and then begin to pupate in June. Pupation will take place in July-August. Adults will appear in the soil in August-September. Adults will remain in the soil and overwinter. They will emerge in June, mate, and begin to lay eggs, completing the cycle.

Phyllophaga life cycle

Phyllophaga life cycle

Cranberry rootworm (Chrysomelidae). Pupation starts in late May and beetles emerge in early June. Adults are nocturnal and hide in leaf litter. Adults can be easily picked up in a sweep net. Females feed on foliage before laying eggs. Young larvae will feed on roots, and feeding continues until October. The mature larvae move down the soil in the fall to overwinter. Holding of the water will delay onset of pupation. Rootworm has a 1-year life cycle. Entomopathogenic nematodes (Heterorhabditis bacteriophora) can be used to control cranberry rootworm.

Use of Imidacloprid. If treatment is needed, use imidacloprid (Admire Pro or other generic insecticides such as Alias 4F) to control white grubs and rootworms. Imidacloprid works best against early- (1st-2nd) instar grubs. Imidacloprid should be used after bees are taken out of beds. Because of the 3-year life cycle, treatment should be continued for 2-3 consecutive years to ensure control. Imidacloprid (active ingredient) is a neonicotinoid insecticide registered for use in cranberries against cranberry rootworm and scarab grubs. This insecticide is a contact and stomach poison that affects the insect nervous system. It is highly systemic and toxic to honey bees; therefore, can be used only as a post-pollination insecticide. Imidacloprid can be applied by ground or by chemigation. Aerial application of this product is prohibited. Imidacloprid has a long residual activity (> 100 days) as long as the insecticide is not directly exposed to the sun. Admire Pro can be used at 7-14 fl oz/acre. A maximum of 14 fl oz of Admire Pro can be used per acre per season. The PHI is 30 days.

Filed Under: Cranberry, Fruit
July 8, 2019

Improving Your Late Season Peach Brown Rot Control Program

From early July through the first half of September, our attention turns to peach harvests. And for disease control, a great deal of focus is on preventing brown rot development in the ripening fruit. Failure to effectively manage brown rot during the first half of the harvest season can set you up for significant yield loss in the second half of the season, especially if rains become frequent. Infected, sporulating fruit from early maturing cultivars provides fuel (inoculum) for infection of the mid- and late-maturing cultivars. Remember, the harvest season is one big epidemic for brown rot.

This article is a continuation of my earlier article titled “Improving your early season peach brown rot control program” (plant-pest-advisorty.rutgers.edu, April 17, 2019). This former publication discussed blossom blight control as well as quiescent / latent infections occurring in young, green fruit.  If you haven’t read this article, or forgot much of it, now is a good time to read or review it. I assume you followed the advice of the former article and therefore do not have significant latent infection lurking in your fruit!

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Filed Under: Tree Fruit
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