Thursday, July 24, 2014

Summer tissue sampling for fertility recommendations

Here is a re-post from last year, its almost time for you to take your leaf tissue samples

Now is the time to do some tissue sampling in blackberry. Plant tissue samples will help you determine needs and adjustments. IN NC, samples should be taken after fruit harvested from the plants. Leaves from the 3-5th node of the primocane plant should be sampled and sent to NCDA and they will make recommendations for the following season. Keep your records so you can see if there are trends in your fields. Below are the recommended levels of macro and micronutrients.

More about how to determine most recently matured leaf (MRML) is at http://www.ncagr.gov/agronomi/pdffiles/sampta.pdf


 Nutritional Status change for primocane MRML about 10 days - 2 weeks after harvest
 NCDA
%


ppm
N
2.4-3

Fe
50-300
P
0.15-0.6

Mn
50-250
K
1-2

Zn
30-46
Ca
0.5-1

Cu
7-15
Mg
0.3-0.5

B
30-50
S
0.13-0.6

Mo
0.04-2

Monday, July 21, 2014

Blackberry flowers to fruit: most fruit ripe or picked! (as of July 17)







For each cultivar, we tagged 5 flowers in the same field. As the season progressed, we had wind damage, picker damage and other sorts of damage. So in most cases, we ended up with less than 5 ripe fruit.  

As of July 17, most of the fruit we labeled in the field has been harvested. Only 2 Von samples were still in the field. 

Based on our guesstimates* of harvest dates, the number of days from flower to fruit are:

Natchez 51
Osage 44
Ouachita 51
Navaho 51
Von 58

* these are based on only 3-4 flowers, so what you may see in your field may vary. 

Thanks to Abby Whitaker and Daniel Shires for their help with data collection and taking pictures on all these dates. 

Wednesday, July 9, 2014

Blackberry flowers to fruit project: More ripe fruit July 3

Pictures from last week, July 3, show that Osage was picked, Natchez and Ouachita were ripe, Navaho is red and Von is still green. We have five fruit of each cultivar labeled, so there is some variation in ripeness. Once all fruit is black, we will average he number of days that it took five fruit to get from flowers to fruit in 2014. 










Sunday, June 29, 2014

Flowers to fruit June 27 seeing red and black!

Natchez won the race, it is the first cultivar to produce a ripe fruit. Two of the five flagged berries are ripe. One was picked before the picture was taken and this one was fully ripe. It took 38 days for this berry to go from a fully open flower to a ripe fruit. We will calculate the number of days for the rest of the fruit as they ripen and post that list at the end of the season.

The flower below was actually at a stage we call petal fall, the flower has been pollinated (you can tell because the anthers are all brown, indicating that the pollen has been released).  It was probably in full bloom a day or so before the picture was taken.


Ouachita, Osage, Navaho are all at the red stage. Von was the only cultivar that still had only  green fruit.

In this little trial, we are determining how long it takes a group of five berries to progress from a flower to a ripe fruit. Fruit in the field are at a range of stages. We have been picking Natchez, Osage and Ouachita in our research plots for over a week.













Photo credits and big thanks to Abby Whitaker and Daniel Shires. Photos taken at Killdeer Farm, Kings Mountain, NC.

Friday, June 20, 2014

Flowers to fruit images from 5 dates

Here is an update on the flower to fruit project. Thanks to Abby Whitaker and Daniel Shires for their work. Navaho, Osage and Natchez are showing a little color change. All of the other  cultivars are still green.

Note, in the field, Natchez, Ouachita, and Osage are already starting to to be picked in some locations. The images below are showing  how long it takes a marked flower to turn into a ripe fruit, and we started taking these images all on the same day.














Monday, June 16, 2014

Field day this week at the Peidmont Research Station in Salisbury NC



Small Fruit Field Day
Thu Jun 19, 2014
4:00 PM - 8:00 PM
Where:
Piedmont Research Station
8350 Sherrills Ford Road
Salisbury, NC 28147-7579
PHONE: (704) 278-2624
FAX: (704) 278-1121
http://www.ncagr.gov/research/prs.htm