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Weekly Field Crops Pest Report 2011

August 30, 2011, Volume 10 Number 16

  1. View from the Field
  2. Weather Outlook
  3. Western Bean Cutworm Update
  4. Clipboard Checklist
  5. Contact Information

View from the Field

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Keith Waldron and I were invited to teach a workshop on confinement fly IPM for Dairy Cattle in New Hampshire. The location was at the Grafton County Cooperative Extension Dairy Farm. We had several extension educators attend and was much like a train the trainer season. While the focus of the meeting was barn flies we did discuss several pasture fly issues and demonstrated a few pasture fly traps. The farm was well managed for flies and was difficult to find habitat for house and stable fly management. One of the photos below show the Smurf boots selected for the meeting.

barn visitors wearing protective boots

Smurf boots a marching!
Keith talking while wearing smurf boots
Keith talking about stable flies in his Smurf boots

alsynite fly trap

This is alsynite biting fly trap. It reflects a blue spectrum of light that stable flies are attracted too. It can be used in the pasture or around outdoor free-stalls or loafing areas. We caught a lot of stable flies in 4 hours.

George Hamilton

This is George Hamilton an agriculture extension educator from Hillsboro County in New Hampshire. He is doing and IPM project comparing the Horse Pal fly trap and the Epps fly trap. He got the help of a 4-H club and kids that were interested in the project. The kids collect the data once a week and email them to George. Both traps have been very effective for catching horse flies and deer flies.

Mike Hunter (Jefferson County) and Mike Stanyard (WNY) report that soybean aphid infestation levels on soybeans have increased. Many of the fields they have scouted are well over threshold. Jeff Miller (Oneida County) states that soybean aphids have also increased but still not over threshold. Recall that soybean aphids can have impacts on yields from vegetative through the R5 growth stage. Spraying at R6 (full size seed in top 4 nodes) or beyond has not been documented to increase yield.

Mike Stanyard is seeing white mold in several soybean fields in northwest part of the state. He states it may not affect yield because it is so late in the season. As reported last week Mike has detected more Phytophthora root and stem rot in soybeans. See his photos below:

phytophthora stem and root rot in soybeans

phytophthora stem and root rot in soybeans

Joe Lawrence reports that western bean cutworm larvae have been detected near Malone, NY. They were detected in a few different corn fields in Franklin County.

Weather Outlook

August 25, 2011

Jessica Rennells, Northeast Region Climate Center, Cornell University

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Temperatures were 0 to 3 degrees above normal this past week. Precipitation ranged from less than half an inch to over an inches. The base 50 growing degree days ranged from 100 to 150 for most of the state.

Today's temperatures will be in the 70's and low 80's with rain likely; a cold front will bring afternoon thunderstorms to some areas. Tonight will be in the 50's.

Friday will be sunny and in the 70's. Lows will be in the upper 40's to mid 50's.

Saturday's highs will be in the mid 70's to low 80's. Most of the state will have sunny skies, but Saturday we will start to see rain from Hurricane Irene move into the Northeast. Southeast NY has the highest chance for rain Saturday. Lows will be in the upper 50's and low 60's.

Sunday will be cloudy and cooler with highs in the upper 60's to mid 70's. Irene will be moving up the coast and could bring rain to NY. The amount of rain depends on how it tracks, and could be largely variable. Lows will be in the low to mid 60's.

Monday will become sunny as Irene move north, and temperatures will be in the upper 60's and low 70's. Lows will be in the 50's.

Tuesday will be mostly sunny with temperatures in the 70's. Overnight temperatures will be in the 50's.

Wednesday will again have highs in the 70's and lows in the 50's.

The five-day precipitation amounts will range widely from half an inch to over 3 inches depending on the track of Hurricane Irene; higher amounts possible if Irene keeps a westward track. The higher amount are expected in southeast NY. The 8-14 day out look is showing above normal temperatures and below normal precipitation.

Check the National Hurricane Center for updates.

Western Bean Cutworm Update:Larvae now feeding?

Keith Waldron

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A few Western Bean Cutworm (WBC) moths trickled in to the statewide monitoring network this past week. Most traps caught zero moths last week. The top catch was 9 moths per trap. Peak WBC flight occurred the week of August 2.

If local WBC egg laying and hatch was successful, larvae would be expected to have moved and reached their preferred feeding site - corn ears or dry bean (and other Phaseolus spp) pods. Unlike other corn ear infesting caterpillars that are cannibalistic towards their own kind, more than one WBC larva could be found per ear. Larvae in dry bean fields would be feeding on pods. By contrast to larvae feeding on corn, WBC larvae feeding on dry beans would feed on pods during the evening and then hide in the soil below plants during the daytime (similar behavior to other cutworm species).

We are interested in hearing about presence and potential impact of larvae in corn or beans. For images of WBC and damage see the factsheet: Western Bean Cutworm Loxagrotis albicosta Smith

Clipboard Checklist

Keith Waldron

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*Emergency contact information ("911", local hospital, Chem. Spill emergency contact, other?) posted in central posting area
*Maintain crop records by field, including variety, planting date, pesticides used, nutrient inputs including manure, etc.
*Watch for any patches of herbicide resistant weeds, weed escapes
*Storage areas cleaned and ready to accept hay, wheat harvest

Field Corn:
* Note crop growth stage and condition, evaluate to time harvest
* Check for western bean cutworm (in ears), European corn borer, foliar diseases and stalk rots, vertebrate injury (birds / deer), weed escapes, herbicide injury, nutritional deficiencies, etc.
* Monitor weed populations noting presence of "who", "how many" and "where"

Alfalfa & Hay:
* Monitor alfalfa seedings for weeds, for potato leafhopper & diseases.
* Check established alfalfa stands for potato leafhopper, weed and disease problems.
* Storage areas cleaned and ready to accept next harvest?

* Note crop growth stage and condition
* Evaluate stand for soybean aphid, spider mites, deer, weed assessment, foliar disease incidence
* Check herbicide resistant soybean fields for herbicide resistant corn

Dairy Cattle: Livestock Barn Fly Management:
* Monitor animals and facilities for house fly and stable fly populations
* Check facilities for favorable fly breeding conditions: (organic matter + moisture): leaks in watering systems, roof gutters for leaks and potential overspill, drainage,
* Sanitation, sanitation, sanitation - clean animal resting areas, feed troughs, minimize source of moist organic matter i.e. fly breeding areas in barn and in adjacent animal loafing yard * Continue fly monitoring: install "3X5" index card fly speck monitoring cards through out barn
* Use, replenish, replace fly management materials: sticky fly tapes/ribbons, insecticide baits, natural enemies (parasitoids), fly population monitoring (3 x 5) spot cards
* Continue release of purchased natural enemies (fly attacking parasitoids)

Dairy Cattle: Pasture Fly Management:
* Monitor animals for presence of face flies, horn flies and stable flies. Action guidelines: face flies (average 10 per animal face), horn flies (average 50 / dairy, 200 / beef cattle per animal side), stable flies average 10 per animal (all four legs)
* Check feed bunk / water source locations for signs of stable fly breeding (moist undisturbed organic matter spilled feed, round bales, etc.), minimize source of moist organic matter i.e. fly breeding areas in barn and in adjacent animal loafing yard
* Check paddocks for forage quality / quantity, rotate as appropriate
* Check paddocks for vegetation poisonous to livestock
* Consider use of fly traps to help reduce deer, horse and stable fly populations

* Pre-clean in and around grain storage bins in anticipation of soybean and grain corn harvests.
* Keep areas around storage bins and silos clean and mowed

* Note any repairs needed for recently used equipment: tractors, tillage implements, harvesting equipment, etc. as they are cleaned and serviced.
* Calibrate manure spreaders - maintain records on amount spread per field


Emergency responder information on pesticide spills and accidents CHEMTREC:  800-424-9300

For pesticide information:

National Pesticide Information Center: 800-858-7378

To Report Oil and Hazardous Material Spills in New York State: NYS Department of Environmental Conservation Spill Response: 800-457-7362 (in NYS); 518-457-7362 (outside NYS)

Poison Control Centers: Poison Control Centers nationwide: 800-222-1222

If you are unable to reach a Poison Control Center or obtain the information your doctor needs, the office of the NYS Pesticide Coordinator at Cornell University, 607-255-1866, may be able to assist you in obtaining such information.

Contact Information

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Keith Waldron: NYS Livestock and Field Crops IPM Coordinator
Phone: (315) 787 - 2432
Fax: (315) 787-2360

Ken Wise: Eastern NYS IPM Area Educator: Field Crops and Livestock
Phone: (518) 434-1690
Fax: (518) 426-3316