[Peanut] Apogee & July 10 Leaf Spot Advisory

— Written By Curtis Fountain and last updated by
To:  Duplin Co. Peanut Interests

From:  Curtis D. Fountain

Agricultural Extension Agent – Field Crops

Apogee
Think of Apogee (BASF) as the Pix of peanuts. Apogee reduces internode elongation. Apogee manages potential excessive vine growth. Apogee improves row definition/visibility, which can increase digging/inversion efficiency. Apogee reduces pod shed/loss (of very mature pods) during digging/harvesting.

Should you use Apogee? Factors to consider include growing conditions, soil fertility, soil water holding capacity, frequency of rainfall/irrigation, variety, past history, etc. Do you have a guidance system for digging?

Apogee will require 2 applications (2-3 weeks apart). Approximate cost/acrefor 2 applications is $60total. Do not spray Apogee too early. The first application should be made when 50% of vines from adjacent rows are touching. The second application should be made 2-3 weeks later.

The Apogee rate is 7 1/4 ounces/acre (each application). Add 1 pint/acre of UAN (30% N, 32% N) and 1 quart/acre of crop oil. The label states failure to add a nitrogen source to the spray solution will result in unsatisfactory product performance.  The label states crop oil will promote consistent performance.  A minimum spray volume of 20 gallons/acre is recommended. The Apogee rainfree period is 8 hours.

In terms of tank-mixing other products (herbicides, fungicides, etc.) with Apogee, Dr. David Jordan (NCSU Extension Peanut Specialist) stated the following in a July 5 email:  If you decide to mix other products with Apogee, make sure you check labels for adjuvant requirements. I have not observed issues with mixtures (and over the years we have looked at a lot of these) but the nitrogen is a must with Apogee and you need to make sure the nitrogen does not impact efficacy of other tank-mix partners.

July 10 Leaf Spot Advisory
Except for Bailey and Sugg, NCSU recommends the first leaf spot spray at R3 (pegs in soil with swollen tips). For Bailey and Sugg, the 1st leaf spot spray is suggested at R3 + 2 weeks (2 weeks after R3). Bravo or Tilt/Bravo (or generics) is recommended for the 1st spray.

For each advisory station location, focus your attention on LESD. LESD is the last effective spray date. A fungicide spray is assumed to protect for 14 days so you do not need to spray if you have sprayed since the LESD, even when the advisory says “spray today”.

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July 10, 2014 PEANUT LEAF SPOT ADVISORY FOR KDPL
Duplin County Airport (Kenansville, NC)
setDate = 2014-06-27 07:00:00
lethal conditions = false
favorable hours = 37
LESD = 2014-06-16
KDPL Advisory: do not spray today
Growing degree days (base 56) since LESD = 527
Growing degree days (base 56) since May 1 = 1248.5
Records count: 288 out of 313
Most recent db ob to 8 a.m. EDT: 2014-07-10 05:55:00

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July 10, 2014 PEANUT LEAF SPOT ADVISORY FOR CLIN
Horticultural Crops Research Stn (Clinton, NC)
setDate = 2014-06-28 07:00:00
lethal conditions = false
favorable hours = 45
LESD = 2014-06-17
CLIN Advisory: do not spray today
Growing degree days (base 56) since LESD = 546.5
Growing degree days (base 56) since May 1 = 1377.9
Records count: 288 out of 289
Most recent db ob to 8 a.m. EDT: 2014-07-10 07:00:00

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July 10, 2014 PEANUT LEAF SPOT ADVISORY FOR KINS
Cunningham Research Station (Kinston, NC)
setDate = 2014-06-28 07:00:00
lethal conditions = false
favorable hours = 41
LESD = 2014-06-17
KINS Advisory: do not spray today
Growing degree days (base 56) since LESD = 550.9
Growing degree days (base 56) since May 1 = 1370.3
Records count: 288 out of 289
Most recent db ob to 8 a.m. EDT: 2014-07-10 07:00:00

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Thanks.
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