Peach:
Brown Marmorated Stink Bug (BMSB): Adults are present at two sites in Monmouth and Middlesex Counties. Numbers are very low, and in both cases the orchard consists of weedy ground cover.
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Seasonal updates on diseases, insects, weeds impacting tree fruit and small fruit (blueberry, cranberry, and wine grape). Fruit Pest Alerts are also available via this category feed.
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July 25, 2017 Cesar Rodriguez-Saona
Upcoming Event – ACGA Summer Meeting
Event – American Cranberry Growers Association (ACGA) Summer Meeting
Date – August 17, 2017
Location– Rutgers P.E. Marucci Center, Chatsworth NJ
Agenda
CRANBERRY BOGS:
8:30–8:45 Opening Remarks
Shawn Cutts, President, American Cranberry Growers Association
8:45-9:05 Screening of POST Herbicides for Controlling Carolina Redroot (Lachnanthes caroliana) in New Jersey Cranberry Beds (Bog 6)
Thierry Besancon and Baylee L. Carr, P.E. Marucci Center for Blueberry & Cranberry Research & Extension, Rutgers University, Chatsworth, NJ
9:05–9:25 Breeding for Fruit Rot Resistance: Evaluation of the Next Cycle of Crosses (Bog 8)
Nicholi Vorsa, P.E. Marucci Center for Blueberry & Cranberry Research & Extension, Rutgers University, Chatsworth, NJ
9:25–9:45 Performance of Welker and Haines and other Advanced Selections (Bog 10)
Jennifer Johnson-Cicalese and Nicholi Vorsa, P.E. Marucci Center for Blueberry & Cranberry Research & Extension, Rutgers University, Chatsworth, NJ
9:45-10:10 Research on Diseases of Cranberries (Bog 15)
Peter Oudemans, Department of Plant Biology and Pathology, Rutgers University
10:10-10:30 Is Mycorrhizal Inoculation Efficacious? (Bog 18)
James Polashock, Research Plant Pathologist, USDA-ARS
10:30–10:50 On-going Research on Sucking Insect Pests (Bog 19)
Cesar Rodriguez-Saona, Department of Entomology, Rutgers University; Vera Kyryczenko-Roth, P.E. Marucci Center; and Robert Holdcraft, P.E. Marucci Center, Chatsworth, NJ
10:50–11:10 Show and Tell
Cranberry growers
CONFERENCE ROOM:
11:20–11:30 Cranberry Statistics
Bruce A Eklund, State Statistician, U.S. Department of Agriculture | National Agricultural Statistics Service
11:30–12:00 Root Growth in Cranberries
Amaya Atucha, Assistant Professor, and Beth Workmaster, Department of Horticulture, University of Wisconsin-Madison
12:00–1:00 LUNCH (Pole Barn)
1:00–1:30 Farm Safety
Ray Samulis, Cooperative Extension Agent, Burlington County Extension, Rutgers University
July 21, 2017 Dean Polk, Dave Schmitt, Atanas Atanassov, Carrie Mansue
Fruit IPM for 7/21/17
Peach:
Oriental Fruit Moth (OFM): Treatments for the third brood are almost over. The second and final treatments are due in southern counties by this weekend. The first sprays for this brood are due in northern counties by this weekend. As with the previous generations, timing for the third generation depends on the type of material that is used. Application timings are as follows:
| OFM 3rd Generation Timing | ||||
| Insecticide Type | ||||
| County/Region | Degree Days by 7/20 base 45 | Conventional
Target – 2100-2200, 2450-2500 |
Intrepid / IGRs
Target -2050-2100, 2400-2450 |
Diamides (Altacor, Exirel
Target – 2025-2150, 2375-2450 |
| Gloucester – Southern | 2366 | 1st – past
2nd – 7/22-7/24 |
1st – past
2nd – 7/21-7/22 |
1st – past
2nd – 7/20-7/21 |
| Hunterdon – Northern | 2047 | 1st – 7/22-7/24
2nd – 8/3-8/4 |
1st – 7/21-7/22
2nd – 8/2-8/3 |
1st – 7/20-7/21
2nd – 8/1-8/2 |
July 19, 2017 Cesar Rodriguez-Saona
The Cranberry Toad Bug – An Update
We are seeing an increase in the number of nymphs of toad bugs in cranberry beds. Growers need to be aware of this insect and treat if numbers reach high levels (there is no current threshold). We are currently conducting studies to estimate the density of toad bugs that can cause economic injury to cranberries.
Life cycle. Toad bugs, Phylloscelis atra, feed only on cranberries. This insect has a single generation per year. It overwinters as eggs. The nymphs appear by the end of June through early September, and the adults from end of July through October (harvest). Eggs are laid from end of August through October.
Cranberry toad bug nymphs
Damage. Feeding damage can be noticed in two stages. First stage feeding damage on vines causes closing in (towards the branch) of the leaves on the new growth. Second stage feeding causes changed in color (reddish to brown) of new growth. The damage can be seen from July until harvest. This damage will cause dying of the branch and the berries to shrivel up. Heavy infestation will result in dwarfed berries.
Management. To determine infestation, lightly sweep problematic beds (bugs should be easy to catch in sweep nets as they are very active). Because this is a new pest there is no threshold established yet. Thus, insecticide applications should be based on the relative number of bugs per sweep compared with other sites and previous history of infestation. Currently, growers can use the following control options: Sevin 4F (broad-spectrum carbamate), Diazinon, Imidan 70W (broad-spectrum organophosphates), Actara or Assail 30SG (neonicotinoid insecticides, effective against piercing-sucking insects). If infestation is high, treatments should be applied at this time of the year.
Toad bug life cycle
For more information, please see “The Cranberry Toad-Bug” by F.A. Sirrine and B.B. Fulton. 1914. New York Agricultural Experiment Station. Bulletin No. 377. Department of Agriculture, Geneva, NY.
July 13, 2017 Dean Polk, Dave Schmitt, Atanas Atanassov, Carrie Mansue
Fruit IPM for 7/13/17
Peach:
Oriental Fruit Moth (OFM): The 3rd OFM flight is well underway in all counties. These adults produce 3rd brood of larvae, which primarily infest the fruit.
July 12, 2017 Anne Nielsen
BMSB is Under Attack!
Samurai wasp (Photo by Elijah Talamas)
Many of our fruit and vegetable growers throughout the state have been battling with populations of brown marmorated stink bug. This invasive pest feeds on most fruiting vegetables, small fruits, and tree fruits and can cause significant economic losses. One of the reasons that BMSB is such a bad pest is that when it arrived in the US, it did so without its co-evolved natural enemies. Until now! The Samurai wasp (Trissolcus japonicus) arrived in the US independently and the first populations were found in NJ in 2016 by the Department of Agriculture. However, no populations had been found in agricultural crops, which made us uncertain about its impact.
Last week, a parasitized egg mass was tentatively identified as the Samurai wasp. The Samurai wasp attacks stink bug eggs and has a special appetite for BMSB eggs. A female wasp will lay its eggs into the stink bug eggs. It is an effective parasite of BMSB and can parasitize on average 50% of each egg mass. Our finding was in a commercial peach orchard in southern New Jersey and may be the first finding in a US agricultural crop. We had placed egg masses in the orchard to measure natural enemy impacts of our border spray approach. We do not know the impact the Samurai wasp will have in NJ agriculture but this is a very promising new development in the fight against BMSB. Reduced spray methods, such as border sprays, may help to protect Samurai wasp populations in crops.
Samurai wasp emerging from BMSB egg mass
Drs. Joe Kaser and Clement Akotsen-Mensah contributed to this article.
