Oneida County Weekly Scouting Report – August 21, 2014

The latest edition of the Oneida County Weekly Scouting Report is available through the Oneida County Cooperative Extension’s website.  Notes from Jeff Miller:

The main issue is the increasing numbers of aphids in local soybean stands. Some stands hit 300-400 per plant this week which is over the published threshold. These fields are at R4 beginning seed so the plants are sending most of their resources to the developing seeds.

I heard reports from the western part of the state that they are seeing not only lady bugs and other predators.. they are seeing the fungal disease attacking aphids now. Their numbers are in decline I believe we will have the same results soon.

With the soybean heights (42-52” tall) and bushiness of many stands… there would be significant damage from sprayers so I have suggested to continue to scout soybean fields and be ready to call for insecticide if you continue to see increasing numbers of aphids and start to see the health of the plants start to decline.

 

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New York State Weekly Weather Outlook – August 21, 2014

From Jessica Spaccio, NOAA Northeast Regional Climate Center, Cornell University

GDD_Aug20Last week temperatures ranged from 4 to 8 degrees below normal. Precipitation ranged from ¼ ” to over 2’.  Base 50 growing degree-days ranged from 40 to 120.

Cloudy and rainy couple of days gives way to nice, dry weather Saturday through Wednesday.

Today will be cloudy with showers and thunderstorms with localized heavy rain; temperatures will be in the mid to upper 70’s. Overnight temperatures will be in the upper 50’s and low 60’s.

Friday will be mostly cloudy with temperatures in the mid to upper 70’s with scattered showers and thunderstorms possible, a few could be strong.  Low temperatures will be in the upper 50’s to low 60’s.

Saturday will be partly sunny as high pressure returns, with a small chance of showers and temperatures throughout the 70’s.  Overnight temperatures will be in the mid 50’s to low 60’s.

Sunday will be partly sunny with highs throughout the 70’s.  Overnight temperatures will be in the mid 50’s and low 60’s.

Monday will be partly sunny with highs in the mid 70’s to near 80. Overnight temperatures will be in the mid 50’s to low 60’s.

Tuesday will be partly sunny with highs in the mid 70’s to low 80’s.  Lows will be in the mid 50’s to low 60’s.

Wednesday’s highs will be in the mid 70’s and low 80’s.  Lows will be in the upper 50’s and low 60’s.

The five-day precipitation amounts will range from ¼” to 1 ½ ” ; 7-day amounts will range from ¼” to 1 ½ ”.

The 8-14 day outlook (Aug 28 – Sept 3) is showing below normal temperatures or all but eastern NY and above normal precipitation.

Maps of 8-14 day outlooks:
http://www.cpc.ncep.noaa.gov/products/predictions/814day/index.php

National Weather Service watch/warnings map:
http://www.erh.noaa.gov/er/hq/

NRCC Drought Page which features the US Drought Monitor map (updated every Thursday):
http://www.nrcc.cornell.edu/page_drought.html

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Delayed Planting Dates and Corn Maturity in 2014

Corn silage will probably be late this year but corn planted by June 8th should attain 68% whole plant moisture.

Corn silage will probably be late this year but corn planted by June 8th should attain 68% whole plant moisture.

Corn producers in NY only planted ~20% of the crop by May 15, ~60% by June 1 and ~80% by June 8th. Most locations in NY received ~30 to 50 growing degrees (GDD) above normal from June 1 through July 15 so fears of immature or wet corn at harvest for late-planted corn were allayed through mid-July. Since then, however, most locations in NY, especially the Finger Lakes and western NY, have received ~75-150 GDD below normal through August 18th. Consequently, fears of immature corn silage, or immature grain or wet and low-test weight grain have once again risen. What is the probability of this doom and gloom scenario?

I think that fears are overblown at the moment because of three important factors. First, the National Weather Service (NWS) has predicted above normal temperatures in NY for the final 2 weeks of August (don’t ask me why I still believe them!). If this holds true, August will come in only ~40-80 GDD below normal for the month and the crop in eastern and northern NY will be close to normal development, whereas the crop in central and western NY will be about 5 days behind. Second, many growers dialed back their maturity (as recommended in the May 16th posting) by 5-10 days once planting was delayed until early June, which greatly enhances the probability of maturation before a killing frost . Finally, corn hybrids (90-100 day relative maturity) that are planted in early June require about ~75-100 less GDD to mature than when planted in early May. In other words, if a grower planted a 100 day hybrid in early May, that hybrid would require about 1200 GDD to silk, another 850 GDD to attain 66-68% moisture for silage harvest (2050 GDD total), and about another 150 GDD to attain black layer (2200 GDD total). The same hybrid, however planted during the first week of June would require about 1150 GDD to silk, and 800 GDD to 66-68% moisture for silage harvest (1950 GDD total), and another ~150 GDD to black layer (~2100 GDD total).

Will this scenario of less GDD to maturation with delayed planting hold true again for this year? As some of you know, we planted a 96 and a 103-day hybrid at Aurora at five planting dates ranging from early April to very late May (May 30th) in 2013 and 2014. The 96-day hybrid required ~1140 GDD to silk when planted on May 7th in 2014 but only ~1100 GDD to silk when planted on May 30th (Table 1). Likewise, the 103-day hybrid required ~1230 GDD to silk when planted on May 7th in 2014 but only ~1180 GDD to silk when planted on May 30th (Table 1). If planting were pushed back another week, the difference in GDD would probably be greater. I believe that the shortening of the silking to ½ milk line or black layer stage will also be occur in 2014. Of course, the shortening of the GDD requirement does come at a small expense to yield. On the other hand, an extended grain-filling period, even with the shortened number of GDD to maturation, should contribute to high overall yields, even at a late planting date.

Table 1. Growing Degree Days (GDD) to silking for a 96 day and a 103 day hybrid relative maturity (RM), planted from early to late May at the Aurora Research Farm in Cayuga Co. in 2013 and 2014.

Table 1. Growing Degree Days (GDD) to silking for a 96 day and a 103 day hybrid relative maturity (RM), planted from early to late May at the Aurora Research Farm in Cayuga Co. in 2013 and 2014.

Table 2 lists accumulated GDD from May, 15, June 1, and June 8th through August 18th for typical locations in NY where considerable corn is produced (not all key growing locations are represented because the weather stations at those locations are missing too many days or there is no long-term averages for those weather stations). I have also listed the average number of GDD at each location from August 18th through the date of a typical killing frost (light frosts of 30-32 degrees just singe the top leaves, especially leaves that are relatively healthy, and corn can continue to fill the grain when light frosts occur). As you can see, the Finger Lakes and western NY regions, which have been much cooler than eastern and northern NY during the last 5 weeks, have many more GDD remaining before a killing frost compared with eastern and northern NY.

Table 2. Growing Degree Days in 2014 (approximate because some dates were missing at some locations) from three dates to August 18th and average number of growing degree days remaining from August 18th until the first killing fall frost.

Table 2. Growing Degree Days in 2014 (approximate because some dates were missing at some locations) from three dates to August 18th and average number of growing degree days remaining from August 18th until the first killing fall frost.

So, if normal temperatures ensue until late September or early October, corn that was planted by June 8th and silked out by August 5th have enough GDD remaining to escape frost damage. Grain growers, however, should expect much higher grain moisture in late October or early November compared with the last few years. What about the remaining 20% of the acreage that was planted after June 8th and didn’t silk out until August 15th, pray for a warm late summer and fall with a very late frost!!!

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Northeast Buckwheat Growers Newsletter

The latest issue of the Northeast Buckwheat Growers Newsletter is available online.

The Northeast Buckwheat Growers field day will be August 27 at Edgewood Farm in Groveland, NY on the edge of the Genesee Valley–details in the newsletter.

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New York State Weekly Weather Outlook – August 14, 2014

From Jessica Spaccio, NOAA Northeast Regional Climate Center, Cornell University

GDD_Aug13Last week temperatures ranged from normal to 4 degrees below normal. Precipitation ranged from ½” to over 3”, most coming from the Tuesday/Wednesday cold front passage.  Base 50 growing degree-days ranged from 80 to 140.

Cool Thursday & Friday, warming over the weekend.

Today will be partly cloudy with cool temperatures in the mid 60’s to low 70’s.  Isolated scattered showers are possible, more likely downwind of Lake Erie & Ontario due to lake enhanced activity; some locally heavy rain possible overnight in these regions.  Overnight temperatures will be in the upper 40’s to the low50’s.

Friday will be mostly cloudy, again with cool temperatures in the 60’s and low 70’s with a few scattered showers possible but decreasing through the day.   Low temperatures will be in the mid 40’s to 50’s.

Saturday high pressure will bring mostly sunny conditions with highs a bit warmer, upper 60’s and throughout the 70’s.  Overnight temperatures will be in the mid 50’s to low 60’s.  Low pressure will bring scattered showers and thunderstorms overnight Saturday into Sunday.

Sunday will be mostly cloudy with highs in the mid 70’s to low 80’s and a chance of showers and thunderstorms.  Overnight temperatures will be in the mid 50’s and low 60’s.

Monday will be mostly sunny with highs in the upper 70’s and low 80’s. Overnight temperatures will be in the mid 50’s to low 60’s.

Tuesday will be mostly sunny with highs in the upper 70’s to low 80 with scattered showers and thunderstorms possible.  Lows will be in the mid to upper 50’s.

Wednesday’s highs will be in the upper 70’s and low 80’s with scattered showers and thunderstorms possible.  Lows will be in the upper 50’s and low 60’s.

 

The five-day precipitation amounts will range from ¼”  to 1” ; 7-day amounts will range from ¾”  to 1 ½”  .

The 8-14 day outlook (Aug 21-27) is showing above normal temperatures; and above normal precipitation.

Maps of 8-14 day outlooks:
http://www.cpc.ncep.noaa.gov/products/predictions/814day/index.php

National Weather Service watch/warnings map:
http://www.erh.noaa.gov/er/hq/

NRCC Drought Page which features the US Drought Monitor map (updated every Thursday):
http://www.nrcc.cornell.edu/page_drought.html

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NYS IPM Weekly Field Crops Pest Report – July 31, 2014

NYSIPMpestreportGet the full issue or subscribe by email to receive notifications of new reports including Videos from the Field throughout the summer.

In this issue:

  • View from the Field
  • Weather Outlook
  • Downy Mildew in Soybeans
  • Gray Leaf Spot in Field Corn
  • Western Bean Cutworm Update
  • Clipboard Checklist

Twitter Icon  Follow NYS IPM Field Crops on Twitter!

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Oneida County Field Crop Report – August 1, 2014

The latest edition of the Oneida County Field Crop Report is available through the Oneida County Cooperative Extension’s website.  Notes from Jeff Miller:

  • PLH numbers are starting to creep up as we get closer to harvest time for third cutting.
  • Soybean aphid numbers are also creeping up in local fields.
  • There are reports of farmers in western NY spraying for soybean aphids.
  • Also reports of armyworm to our east, west and south so be on the lookout.
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