Apogee Use in Peanut 2012

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Apogee

Quite a few people are expressing internet in applying Apogee. They will have difficulty getting product but if they can get product it most likely will pay dividends even though it is expensive. One farmer I discussed this with said he could get enough for one spray but was not sure about getting product for a second spray. My advice was rather than spray the whole crop with a single spray he should spray every other digging pass with two sprays. The farmer could then dig the sprayed areas first (with good row visibility) and then it would be somewhat easier to dig the unsprayed sets back across the field. Growers with RTK systems will not need Apogee for row visibility, but sometimes rank vines do not invert well. For growers that routinely dig early, before optimum maturity, Apogee will be of minimal benefit in terms of pod retention. I do think growers that push digging back, either because they want the highest yields possible and best grades will benefit from Apogee. It will help hold on pods for a while, but it is not a miracle cure for late digging. Some growers with a lot on their plate might benefit from it simply because they cannot get to fields as quickly as they would like, especially if we have a wet fall.

Always add nitrogen and crop oil to Apogee. Space applications apart by 2 to 3 weeks. With our growth so far, wait as long as you can on the second application to catch as much regrowth as possible. Some field will need 3 applications to hold peanuts but we have not looked at three applications because of expense. When we have looked at delayed applications (two shots) in some cases we have seen lower yields with the later applications of Apogee. There is a certainly a preharvest interval that escapes me right now, but applying in late August and into September might be causing issues with pod development. From mid-July through mid-August is the primary window and is most effective and probably the safest in window terms of crop response.

Apogee is like mepiquat chloride (Pix) in cotton. Don’t spray it too early. The canopy needs to close. Also, my experience is that you can add fungicides, clethodim or sethoxydim (various formulations), 2,4-DB, and pyrethroids with Apogee and not affect performance of Apogee. BUT, the crop oil and nitrogen might be issues with sprays designed to control both leaf spot and stem rot (and most certainly Sclerotinia blight.) These adjuvants will keep the fungicide on the foliage or perhaps help them be absorbed into foliage, and this will ultimately keep less of the material from reaching the crown and soil level where stem rot and Sclerotinia blight develop. For that reason I would apply Apogee as a single treatment along with crop oil and nitrogen solution without other products.

Frist, this is the proper stage of growth for application

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Sprayed and non-sprayed areas.

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Canopy closure in fields will vary. While 95% or more of this field was ready, the gaps between rows here, where peanuts were too small, my yield less. Do not spray peanuts when they are several inches or more from lapping.

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Article first appeared as North Carolina Peanut Note (PNNC-2012-043)