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Weekly Field Crops Pest Report 2009

September 17, 2009                     Volume 8 Number 21

1. View from the Field

2. Weather Outlook

3. Soybean Rust Update

4. Soybean Aphid Update

5. Clipboard Checklist

6. Contact Information

View from the Field

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Extension educators state that many growers are asking about Hessian fly free dates as they gear up to plant winter wheat. Make sure you plant AFTER the Hessian fly free date. By doing so, not only are you avoiding infestations of Hessian fly but also certain aphids that can transmit yellow dwarf virus. For more information on Hessian fly free dates view the Cornell Guide For Integrated Crop Management.

Weather Outlook

NOAA NE Regional Climate Center, Cornell University

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Temperatures were close to normal again this past week, most of the state was 0 to 3 degrees below normal, but a few areas were 0 to 3degrees above normal.Most of the state had between .01 and .50 inches of precipitation.Southeastern NY had .50 to 2inches.A small area in Orleans and Monroe counties had over 4 inches of precipitation.

The Base 50 Growing Degree Days ranged from 25 to 100.The entire state is behind last year, most of the state is 10 to over 14 days behind last year. Compared to normal most of the state is still behind. Western NY is 7 to14 days behind and Central NY is 3 to 14 days behind. The Northern Plateau, St. Lawrence Valley, and Mohawk Valley are 10 days to more than 2 weeks behind normal. The Champlain Valley and northern Hudson Valley are 0 to 7days behind normal. Areas in the Catskills and Hudson Valley are 0 to 10 days ahead of normal

This week's weather will be similar to last week's. There's a chance of precipitation for today and tomorrow. Today we'll have highs in the low to mid 60's and temperatures in the 40's tonight. Friday's highs will range through the 60's and lows in the upper 30's to mid 40's.Saturdayand Sunday will be nice. Saturday's temperatures will be in the low to mid 60's and Saturday night will range from the upper 30's to upper 40's.Sunday will have highs in the upper 60's and low 70's and lows in the low 40's.Mondaythere's just a slight chance of scattered showers; temperatures will be in the70's during the day and upper 40's and low 50's at night. Tuesday will have highs in the mid to upper 70's and lows in the upper 50's with a chance of scattered showers. Wednesday will still have a chance of scattered showers and they'll be more likely in the southwest part of the state. Temperature's will be in the upper 60's and low 70's during the day and upper 50's and low 60's at night. The five day precipitation totals will be 0 to half an inch, the higher amounts will be toward western NY. The 8-14 day outlook is showing temperatures slightly above normal for the eastern half of the state and precipitation slightly above normal for the southern half of the state.

Soybean Rust Update

Gary Bergstrom
Plant Pathology, Cornell University

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Soybean rust has not been detected in New York. The current risk of soybean rust in New York is considered to be low. Most likely no management practices are warranted for the remainder of 2009.

NY State Soybean Rust Hotline: 607-255-7850

NYSSoybean Rust Website

USDA SoybeanRust Website

Soybean Aphid Update

Keith Waldron

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Crop Growth Stage Last Modified: 09/14/09 03:43 PM

Soybean fields are generally maturing across the state with the majority of fields currently at early to late pod fill stages. Some early maturing varieties beginning to loose all leaves. A few soybean fields in central NY were harvested this week.

Scouting and Management - Insect Last Modified:09/14/09 03:43 PM

Soybean aphid populations have dropped significantly in most fields with few soybean aphids present. Populations of beneficial arthropods including Coccinelids, syrphid flies, lacewings, parasitic wasps and fungal pathogens reported statewide. Spider mite infestations, foliar diseases and white mold have been reported in soybeans in some areas of central and western NY. Monitoring individual fields recommended to provide the best information for management decisions. Producers are encouraged to continue monitoring soybean fields through late pod fill stage for soybean aphids, other insects, natural enemies and late season soybean diseases. Follow management guidelines as recommended in USDA protocols and Cornell Recommendations for Soybean Integrated Field Crop Management

For more information see: USDA Public PIPE Website:Management Toolbox - Guidelines - USA

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, yields, etc.
* Watch for weed escapes, any patches of herbicide resistant weeds?

Field Corn:
* Note crop growth stage and condition
* Check for European corn borer, foliar and stalk rot diseases, vertebrate injury (birds / deer), weed escapes, nutritional deficiencies, western bean cutworm, etc.
* Check corn for kernel maturity, timing of silage harvest
* 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 and white mold incidence
* Note presence of herbicide resistant corn


* Plant winter wheat after Hessian Fly-free date

Dairy Cattle Livestock Barn Fly Management:
* Monitor animals and facilities for house fly and stable fly populations
* Barn fly numbers may increase as outside flies seek warmer conditions during cooler weather.
* 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 (3x 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 (average50 / 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
* Check temperature and moisture of previously filled bins (wheat, etc.)

* 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

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