Monday, September 26, 2016

More pecan cultivars ripen in late September

Faith, 26 Sept 2016
    Today was a beautiful day go to the field and look for more cultivars with split shucks. The cultivars shown at right and below are all pecans that we haven't gained a lot of first hand experience with. Faith and Gardner are two cultivars that are very similar to Pawnee in nut size, shape, and shell-out but both ripened just a few days later than Pawnee.
    Hark, an impressive seedling of Major, split shuck ahead of both Major and Kanza (Kanza=Major X Shoshoni).
   Surecrop is a pecan named and propagated by Stark Bros. Nursery with the original tree found in Carlinville, IL. Waccamaw is a seedling of an unknown cultivar with the original tree growing in Golden City, MO. 

Gardner, 26 Sept 2016
Hark, 26 Sept. 2016
Surecrop, 26 Sept 2016
Waccamaw, 26 Sept 2016

Friday, September 23, 2016

More early ripening pecan cultivars

Colby, 23 Sept 2016
    After a week of warm and dry weather, I searched our pecan cultivar trials for more nuts that have split open their shucks. This time I found several USDA clones ripe as well as several well known pecan cultivars. Photos of these cultivars appear at right and below (I couldn't resist taking a photo of a eight-nut Pawnee cluster).

Goosepond, 23 Sept 2016

Pawnee, 23 Sept 2016

Shepherd, 23 Sept 2016
USDA 61-1-15, 23 Sept 2016
USDA 61-1-X, 23 Sept 2016
USDA 64-11-17, 23 Sept 2016

Wednesday, September 21, 2016

Late season pecan kernel filling

      During the first half of September we received several, much-needed rain showers. The additional moisture has had a big impact on pecan kernel fill, helping to fully pack the inside of the shell with kernel. Last week I collected nut samples from four pecan cultivars and then this week, I collected nuts from the same cultivars. I cut open the nuts in cross-section and then photographed kernels. By comparing the photos taken a week apart you can see how pecans fill their kernels late in the season.
    The photo above shows two cultivars. Pawnee nuts are shown on the left and Kanza on the right. The nuts collected last week are shown above the nuts collected this week.
    Now let me point out some key differences between last week's and this week's pecans. First, note that the Pawnee shuck has separated from the shell. Pawnee should be in full shuck split by the end of this week. Now focus on the packing material between the kernel halves and the material that fills the dorsal groves of the kernel. On September 14 this packing material was orange in color and still spongy in character. By September 21, the kernels of both Pawnee and Kanza had expanded significantly and compressed the in-shell packing material. The partition between the kernel halves became thinner, changed color, and became harder. The packing material in the dorsal grooves also became compressed and turned brown in color.

    I also collected nuts samples from Lakota and Giles. These two cultivars ripen in mid-October so they are still working on filling their kernels. However, over the past week both cultivars have developed much plumper kernels and compressed internal packing material. Over the years, we have noticed that Giles often struggles to develop full, meaty kernels. Based on the number of air pockets still present in Giles kernels at this time, the 2016 Giles crop will be no different.     

Monday, September 19, 2016

Early ripening pecan cultivars splitting their shucks

Warren 346, 19 Sept 2016
   Today, I spent some time in our pecan cultivar trials and found that some of our early ripening cultivars have started to mature. I found eight cultivars with a majority of their nuts in shuck split (pictures at right and below). In fact, Warren 346 has been split for some time. Just look at the dry and blackened shucks ready to release Warren 346 nuts from the tree.
     By the end of the week I should be able to find even more cultivars fully ripe.
Canton, 19 Sept 2016
Henning, 19 Sept 2016
Lucas, 19 Sept 2016

Mullahy, 19 Sept 2016

Norton, 19 Sept 2016
Osage, 19 Sept 2016

SWB617, 19 Sept 2016