Sunday, October 24, 2021

Growing Nuts in North Dakota


Riverbend Hazelnuts


 
This is my path between 2 hazelnut plots in October. As you can see I fence off all the plots of hazelnuts to keep the deer and rabbits out. The deer will nip off the higher new branches with the catkins (male flowers that develop in the late summer) and the rabbits will chew off the bark on the lower part of the stem. I have not yet found a way to keep the squirrels, mice, and raccoons out, but I'm working on that.



These are the catkins on a American hazelnut that came from Northern Minnesota just a couple miles from the Canadian boarder. They form on the branch in late summer, and if the deer do not remove them they will elongate and expand in the spring and release their pollen to fertilize the female flowers that appear in March. Notice that they are a single catkin held tight to the branch. Some of the hybrids have different types of catkins that may winter damage and never open up and release their pollen. I can always count on these hardy type catkins to deliver pollen in the spring for the whole orchard.




These are catkins on the hybrid hazelnut plants. They have multiple catkins on one stem which are not as hardy as the catkins on the American hazelnut and will sometimes have some winter damage and not shed their pollen. These hybrid plants also produce the largest, best tasting nuts. 
When planting hybrid hazelnuts in this area it's best to plant several types to ensure a good pollination every year no matter what type of weather you have in the winter and spring.  



The dual catkins on this plant is on a beaked hazelnut, Corylus cornuta.
Knowing what the catkins look like gives some insight as to what type of nut it will produce.




This is the fall color of the hardy American hazelnut in the last week of August.

 


The last week of September and this American hazelnut has already dropped its leaves.
To help in judging the hybrid plants hardiness I try to note the time the plant drops its leaves.




Here are the fall colors of some of the hybrid hazelnuts in the middle of October.
Most of the hazelnuts that have this very nice orange and red coloring do not produce decent nuts, and I'm hoping some day to have a plant with large nuts and great fall colors.



Evaluating nuts for the fall 2021, I found they are all slightly smaller than last year. 
I think this was due to the very dry spring and summer and the fact that I do not irrigate the mature plants.
It was hard just to keep the garden, potted hazelnut plants, and the hazelnut plants I was layering watered.
Another problem was that the Sheyenne river was so low that I had a hard time pumping from the river.
This is the first time in 40 years that I was actually wondering what I would do if the river stop flowing because I could not afford using Cass Rural Water.




I cracked a few of the nuts to show the shell thickness and size of the kernel.
It will also show if the kernel has a pellicle (a thin papery covering of the kernel).




This is a close up of just the hazelnut kernel, and you can now see a pellicle on some of the kernels.



In this picture you can see how the kernel did not fill out the shell. This happens when the nut is picked too early and has not matured enough. These nuts were falling off the tree, so I assume the cause was the drought conditions. 



Jason Fischbach's Hazelnut Research Bulletin Dec 1, 2020 had one paragraph that really hit home for me:

"Although the kernels had reached full size in the shell by mid-August and appeared fully formed and mature, looks can be deceiving. It can take another 3 weeks or more for the starch and moisture to replaced by sugars and oil such that the kernels stay fully formed upon drying. If harvested too early, the kernels shrivel and aren't saleable. The general recommendation for hybrid hazelnuts grown in the upper Midwest is to wait for the nuts to abscise and be loose in the husk before harvesting. Understandably, this recommendation is hard to follow while watching blue jays and squirrels make off with the clusters."

Upper Midwest Hazelnut Development Initiative and Jason Fischbach have been doing a great job updating and distribute all the new hazelnut research to anyone interested in growing hazelnuts.





Several plants had these cracked nuts. These were from plants with thin shells and that mature late.
This year we had a very dry spring and summer and then this fall we had a lot of rain, so these plants must have swelled the kernel with excess moisture and cracked the shell that had already hardened.
This is the first time I've ever seem this and it will be interesting trying to process them. 



Other nuts in the orchard


There are few different types of nut bearing trees in the hazelnut orchard.
This is a buckeye of which I have a few different types of these inedible nuts.  I thought the squirrels would go for these larger nuts instead of the hazelnuts. I found that the squirrels will not touch these nuts until all the hazelnuts are gone.




The black walnut that I planted in 1978 is now 60 feet tall and produces large quantities of nuts. The squirrels do like them, but they still prefer hazelnuts over black walnuts.




This black walnut I grew from seed and planted it in the hazelnut orchard to find out if they affected the growth of the hazelnut plants. So far the only thing I found was that it's starting to shade out some of the hazelnut plants and might have to be removed. It does produce a lot of nuts, but I just haven't required a taste for them yet. During the winter I do snack on them quite a bit. The tough part is cracking the nut.




This is just a small portion of the black walnuts I pick up everyday.
If you look on the ground around the tree you can see the empty shells.  I think the squirrels had a party the night before.




Here are few of the black walnuts that I'm drying down for the winter.
That is not some other type of fruit in the picture but a walnut in the husk.
The husk also contains a dye will turn your hands permanently black, so wear a pair of good gloves when removing the husk. 




The pecan here has now grown for 2 seasons and made it through our North Dakota winters . In 20 years it might start producing nuts. I received 6 pecan nuts from Derek Jundt in Bismark February 2020 and 5 are still growing.





This tree might be a butternut and it did bloom last year, but as yet it has not produced any nuts.
This tree did have one stem 5 years ago but a buck deer destroyed it and now it's more of a butternut bush until it is pruned back into more of a tree form.  Now I've been putting up a wire fence around it every fall. 
One interesting thing is that I'm not sure if it is a butternut plant. I ordered 2 butternut plants from a nursery and both are complete different.  




This is a branch from that plant from previous picture with 2 main stems.
I do have butternuts that I've grown from seed 
and each one is a little different, but this one is completely different.
 


 

This is a branch from the second butternut that I purchased. It is not even close to the other plant. 
It does closely resembles the butternuts I've grown from seed.



This is a butternut that was grown from seed and it does look very similar to the second tree that I purchased.


 
 
Here is the entire butternut tree that was grown from seed.



The next pictures  are of branches are from different butternut seeds that I collected  and grown from different plants





In doing some research to find out if these are all butternuts, I read that quite a few are hybrid butternuts to increase the hardiness of the common butternut.
They stated that the hybrids are usually crossed with heartnuts.
It will be interesting see what type of nuts these trees will produce.



Identifying a black walnut 
 

When identifying a black walnut I have found that the new growth and leaves have a sticky feeling and the primary and secondary buds are together above where the new leaf connects to the stem. 




This is a black walnut right after leaf drop, note the location of the primary and secondary buds above the leaf scar.
In 1980 I bought 2 butternuts from some mail order nursery and when they started producing nuts some 10 or 12 years later I realized they were black walnuts. I was a little upset and cut both down.




This is the result of squirrels planting black walnuts in my back lot  for the past 10 years. I'm planning on planting hazelnuts in this area so all but 3 of the black walnuts will be removed. 
One interesting thing I noticed is common buckthorn (one of my most hated plants) disappeared almost entirely from this area. I assume the black walnuts must gradually inhibit buckthorn growth.



Instead of removing all these volunteer black walnuts, I've been grafting butternuts on them.
 So far three look like they'll make it.




I also have 2 shagbark hickories. They always have such a bright golden fall color every year.
I've read it takes 30 to 40 years to mature and produce nuts. 
They are just about 10 years old so in just 20 years it might have nuts.
That's quite a big difference from hazelnuts which take only 3 or 4 years to start producing nuts.




Northern Plains Botanic Garden Society's Edible Forest has 3 of my hybrid hazelnuts that were planted in the fall of 2019. I was surprised to find nuts growing on one of the plants. I did try hand pollinating the plants this spring. With the large numbers of catkins on all 3 plants now, there should be nuts on all 3 plants next year.



I found this interesting that hazelnuts have started growing on the riverbank.
The squirrels must have buried some nuts along the bank. These are mostly American hazelnuts that like to sucker and should cover most of the river bank in a few years. They should make a great riparian buffer zone for wild life and hold the riverbank from eroding. 




Some other interesting plants that are not nut trees are this Sea Buckthorn (Hippophae elaeagnaceae).
They are a little invasive and should not be planted in the front yard. Both a male and female plants are needed for fruit production. The berries taste like a sour orange or grape fruit and are high in vitamin C.
These are not to be confused with the common buckthorn (Rhamnus cathartic L.) that I've been trying to eradicate for 40 years.




Another interesting plant is this Trader mulberry that I received from Jim Walla.
It was loaded with fruit this year, but the birds got almost every one and left me with the scraps.




After the rains started this fall, these mushrooms showed up on this ash stump. The orange colored edible mushroom is called chicken of the woods, which is one of my favorite fungi.




This is chicken of the woods fried up and ready for tasting.😛




























Saturday, August 21, 2021

Hazelnuts summer 2021


A new beetle attacking hybrid hazelnuts

Copyright © 2014 tom murray


This is one of the jewel beetles, Agrilus pseudocoryli, that can cause the dead and dying branches of wild and hybrid hazelnuts and may be causing damage in the Lino Lakes area.





While visiting my son in Lino Lakes, MN, I noticed some dead branches on his hazelnuts.




Below the dying branch was a swelling of the stem. I also notice dead branches on 3 other hazelnut plants.





There was a D shaped hole just below the enlarged area of the branch.





I shaved off the bark and found that a bark borer had girdled the branch causing the upper part of the branch to die.




I pruned out the dead branches and found the D shape hole in all the branches.

I contacted the Northern MN Hazelnut Cluster group and Brian Aukema, the forest entomologist at the U of M, responded with this information.

Brian Aukema                         Fri, Jul 30, 4:38 PM 

NORTHERN_MN_HAZELNUT_CLUSTER

Yes, we've noticed increased borer activity this year and have been looking into it. These are native Agrilus beetles (same genus as Emerald Ash Borer) that leave D-shaped exit holes in the stems, usually slightly above cracked stem swellings. 


One our technicians, Patrick, has been working with Hailey Shanovich this summer (both copied) and provided this little summary:

"There are at least two species that use hazel as a larval host in our area. The beetle we've been seeing in large numbers is Agrilus pseudocoryli, a species for which there is very little published information. Adult beetles emerge in late spring to early summer - we saw the largest emergence this year around the second week of June in St. Paul and Rosemount. We have noticed the exit holes on a substantial number of dying branches this year."


We are working on quantifying the extent.  We did a small feeding assay in the lab, but do not think the adult feeding contributes to branch decline.  I'm sure the drought has exacerbated this problem.


I would like to thank the Northern MN Hazelnut Cluster group, Brian Aukema, Lois Braun, and Greg Schwese for their help in identifying this pest.





Not only where their dead branches on the plants, but Japanese Beetles as well.
As you can see they do a good job stripping the leaves.
I'm glad the borer and Japanese Beetles have not made it to my orchard in North Dakota, but I know they're probably moving this way.





One pest I do have is the Hazelnut weevil. 
I finally got a good picture of a adult weevil and sent samples to Patrick Beauzay, NDSU Research Specialist, Extension Entomology, who identified the adult weevil as Curculio obtusus, a species that is common on hazelnuts in the eastern U.S. and less common as far west as eastern Manitoba and eastern North Dakota.







This is the larva of the weevil emerging from the hazelnut after the nut was cracked.
This picture was taken on the 6th of August. I had no idea they emerged from the nut so early.





This year the weevil larva has emerged early before I could pick the nuts.  I count on controlling the weevil by picking the nuts as early as possible and catching them in trays on my drying racks. This technique may not work anymore if the weevil larva as already left the nut a week before they're picked. 
I might have to look into other options for controlling this pest.  










This is another type of weevil identified by Pat Beauzay as a Green Immigrant Leaf Weevil. The adult green weevils feed on leaves and the larvae feed on roots.
I think they may be damaging the immature nuts when they're small because I found them inside the husk next to a damaged nut. I also found  many of them hiding in the husk next to the mature nuts.







Early squirrel damage



I was surprised to see so much squirrel damage this early until I checked the hazelnut plant and found some were ready to be picked. 



Here is my first plant that I harvested which is a week earlier than last year.
I think it was either due to the early warm weather this spring or this year's hot dry summer.
I estimate the squirrels removed about half the nuts before I got there.




Here I am picking hazelnuts and trying to stay ahead of the squirrels.





This is a close up of the hazelnut cluster. Before picking the cluster of nuts I always make sure the nut rolls easily out of the husk. Just below my hand are the catkins developing which will pollinate next years crop in the spring.


This is a close up of the catkins (male flowers). I pay close attention to their location and try not to remove them when picking the hazelnuts.
 



Here I'm showing the general height of this hazelnut plant. This plant may be about 20 ft tall. 




This is the base of that same plant. I plan on removing the center stems, because they have started to produce smaller and less nuts than the stems on the outer portion of the plant. 
Could it be possible that the outside stems are girdling the center stems?





Different types of hazelnut husks (involucre)



This one has a long leafy inclosed husk almost like a Beaked Hazelnut.




This one has more of an open leafy husk and it's one of my best plants with a large nut that separates easily form the husk.




This one has more of a thick juicy husk that is hard to dry down and it tends to dry around the nut making it hard to separate the husk form the nut.  




Here we have a husk that almost aways stays on the plant and the nut will just fall out when ripe. These are similar to the European Hazelnuts that are swept off the ground.

 


This is another one of my better plants with a large nut that separates easily from the husk.








The husk here is from a wild American Hazelnut which drys around the nut and the husk has to be pealed away from the nut which is a little tough on the fingers. 
This is one I prefer not to pick and the squirrels will not usually touch these until all the other hazelnuts are gone. 




Here is another open husk in which the nut easily drops out.




The husk here is one that tends to dry around the nut but is easier to remove in the mechanical separator.






This one has a smaller nut that drops out of the leafy husk.
On this plant I lay a tarp down and shake each stem. The ones left on the plant I remove by hand.




This is the one I hate the most with the small sticky hairs on the outside of the husk and when dried down the husk becomes a hard covering. This is one the squirrels will not touch and when dry the squirrels burry the whole husk and nut.



Another harvest under way for 2021.
The green house, aka drying shed, makes a safe place away from all the pests to dry down hazelnut clusters.