Part 15

In our planting we have some trees that will bear this year. Next year they won't bear, but their sister trees will bear. So we have pods every year from some of the trees. Over a period of five years, during which these trees were planted (the oldest trees that we have in 1938, and in 1942) the average production of the Millwood was 58.3 pounds per tree. In 1943 there were no pods produced on the Millwood variety. We had a cold spell in the spring that completely eradicated all of the fruit in that year. In 1944 the average yield--and that is taking the average yield of 10 trees of the oldest ones that were put in--the average yield was 146 pounds of pods per tree.

Mr. McDaniel: That's for both varieties?

Mr. Moore: That's just for Millwood. I will give you the Calhoun in a minute.

Then in 1945 the average yield was 39.5 pounds per tree. In 1946 we had an average of 180 pounds per tree. In 1947 we had an average of 12 pounds. Now, note the break there in averages from year to year: 58, none, 146, 39, 180, 12. You get from that that we have almost definitely alternate bearing in those trees.

Now, this other thing is interesting. If you take the five-year average from 1942 through 1946 inclusive, and convert that to 35 trees--this is 10 trees--but when you convert that to an average of 35 trees per acre you get the equivalent of 92 bushels of oats per acre. Now, understand, with this yield of pods we were cutting two and a half tons of hay from the _Lespedeza sericea_ each year. So we were getting our hay crop and our grain crop from the same source.

Now, to give you just briefly what the Calhoun variety did during those years, in 1942 the Calhoun trees--the same age planted under the same conditions on the same soil--averaged 26.4 pounds of pods per tree. In 1943 the Calhoun followed closely with the Millwood; on account of a freeze they didn't produce anything. In 1944 they produced 32.4 pounds of pods per tree. In 1945 they produced 63.8 pounds of pods per tree. In 1946 they produced 22 pounds of pods per tree, and in 1947 they produced 46 pounds of pods per tree.

Now, if you will take the average of those, contrast it with the average for the Millwood, you will find that the Millwood tree over a period of five years produced almost three times as many pods as the Calhoun. The Calhoun variety has a little more carbohydrates, and it always averages a little more sugar per pound than the Millwood, but the additional yield of the Millwood variety makes it very worthwhile.

I have done quite a bit of work on the blooming habits or the fruiting habits of the honeylocust over a number of years, and I find that there is quite a variation there in the individual trees. Some trees are typically males. They never bear anything, but they have staminate catkins. Others are typically females, never bearing anything but the pistillate flowers. Then we have an integration there of perfect trees. I know of one tree in Blount County, Alabama that for nine years never missed a crop. It had perfect flowers, or rather, both pistillate and staminate flowers on the same tree. However, the flowers were borne on separate catkins, the pistillate flowers, catkins, coming out on the same node with the male and producing the pod. So you do have a large variation in the fruiting habits, and we have found those variations on Millwood selections and on Calhoun selections, even though they were vegetatively propagated.

The reason why we can take a bud off a female Millwood and put it onto a root stock and get a male tree I can't figure out, but they seem to act that way in that respect. I have had a Millwood tree that never bore anything but male flowers.[18] That is something for someone else to figure out. I can't explain it.

Just briefly I'd like to give you the observational work that we have done with honeylocust. For mules in a feeding test we fed a team of mules for 30 days nothing but honeylocust and hay, and these mules were in fine shape when they came out at the end of the feeding test. You say that's an awfully short feeding test. It is, but we had very few pods. Then for cows I have gone into it more extensively. I have a cow myself, and I have fed that cow honeylocust pods and that was all the grain she had through the winter months, and got excellent milk production. You get excellent milk flavor from these pods and an increase in milk production.

A very interesting thing happened. I went out in the community to gather pods from the wild trees for a feeding test, and there was a lady who owned a farm pretty close to our project. I went over and talked with her about getting the pods from her trees to feed to my cows for feeding tests, and it was O. K. But when I left she got to thinking the thing over, and she decided that if honeylocust pods were good for my cow they would be good for her cow! So I went back in a few days' time--the pods weren't mature when I went the first time. I went back in a few days and I didn't ask the lady if I could get the pods, I just stopped on the side of the road and we put a darky up in the tree to shake the pods off. And we saw a little darky coming across the field, just a streak. He said, "Missus says come over to the house." I went over there, and she was just a little bit embarrassed, but she said, "Mr. Moore, I have decided if honeylocust was good for the goose it was good for the gander, so I have been feeding honeylocust to my cows." And she went on with that story and said that she had been selling milk to a fraternity over in town, and the boys at the fraternity, after she had fed the cows honeylocust for a week or two, asked her what had happened to her milk, and she told them--she said honestly she was afraid she was going to lose the trade, she thought something bad was wrong with it. She told them, that so far as she knew there wasn't anything. They said, "Have you done anything to it?" "No, we haven't." They said, "Well, it's the best milk we have ever had, and we can tell the difference in the taste." And then she told them what she had done. She wouldn't tell them before.

Now, we have had story after story coming to us to corroborate that. Now, I have never seen with my cow any difference in milk flavor, either good or bad, but my wife can definitely tell, and she is very particular about her butter, because she likes to sell that. I can quit feeding honeylocust a few days, and my wife will say, "How come you quit feeding honeylocust to the cow?" It is that definite.

There are two things I want to mention: The value of a combination of a perennial ground cover with your honeylocust tree, and then I want to mention the fact that honeylocust _planted_ in a pasture will give no benefit whatsoever. You are going to have to grow your honeylocust on the outside, harvest the pods and feed them just like you would corn, or you are going to have to plant your honeylocust on a barren hillside someplace that doesn't grow anything else--and I think honeylocust will grow with a little fertilizer on about the poorest soil you have, the most eroded soil you have, with a little care--then pasture it after your trees are large enough so that the cow won't eat the limbs. There is something about the tree itself that a cow loves. They will chew the bark and chew the limbs right down to the main trunk.

We have tried planting those trees at four years of age, even, in pastures, and we just can't get them to survive. In fact, the cows and the mules in our pasture ate the trees down to the stumps in the wintertime before they ever started putting out leaves in the spring. So it has been a problem. (See Dr. Diller's pasture tree-guard paper in this report.--Ed.)

This value that you can get from growing honeylocust and _Lespedeza sericea_ on the same soil is the same as with honeylocust and alfalfa if you are in the alfalfa belt, or something like that with other perennial legumes. These are the benefits that I think you can get from a combination: In the first place, the soil is completely protected. In the second place, a concentrate and hay can be grown on the same acreage. Third, a good grazing and feeding out program can be maintained. If you plant your honeylocust on a hillside someplace and let the trees get large enough so that the cows won't eat them up, have your ground cover established, by the time that you are ready to pasture it you can put your cattle in. We had this combination, and I think it would have worked out very well if it had not been destroyed. We had our _Lespedeza sericea_ for our summer grazing crop; then we had winter annuals planted in the _Lespedeza sericea_ for our winter grazing, and the honeylocust was the fattening crop or finishing-off crop.

What we had planned to do was turn the cattle in on this last plot about January 1st, let them graze crimson clover, or bur clover, or any other winter ground cover that grows in your section until the _Lespedeza sericea_ came on in the early summer. Then they'd graze the _Lespedeza sericea_ till the honeylocust pods started falling in the fall, and they'd fatten off on the honeylocust, and you'd put them on the market just before the Christmas holidays.

Then fourth, the management cost is very low. Fifth, the weed problems in your pasture are controlled. Sixth, you get maximum production from the soil. You get your grain and your hay from the same piece of land.

Now, that's all that I plan to give on this subject. There may be some questions come up that we can discuss later.

A Member: What is the sugar content?

Mr. Moore: The sugar content of the Calhoun pods is around 38 per cent, in the Millwood about 36 per cent.

A Member: Is it different in the two varieties?

Mr. Moore: Not very much, only about 2 per cent different.

A Member: What spacing do you use in planting?

Mr. Moore: 35 by 35 feet is about the correct spacing.

Mr. Fisher: What is your labor problem? You say this is equal to oats. Can you run a combine over the field and harvest in one operation?

Mr. Moore: This one you don't harvest at all. The cow picks them up off the ground.

A Member: If you had a few hundred trees, would these pods all come on at one time, or you mentioned having somebody shake them off. Can you pick them all up at one time?

Mr. Moore: Yes, you can shake them all off at one time, rake them all up with the rake, take a pitchfork rake, carry them to the barn and throw them in storage in a dry place. You don't have to worry about weevils.

A Member: Store them like hay?

Mr. Moore: Hay or corn. I have some that have been stored for three years, and the weevil gets into the seed, but it doesn't seem to affect it. My cattle like three-year-old pods as well as the new ones--well, they like them better.

Mr. Weber: Do the pods heat up?

Mr. Moore: They won't heat up, if they aren't green.

A Member: What about the protein content?

Mr. Moore: I will give you the analysis for that, the complete analysis of ground honeylocust pods. That might be interesting. Moisture content, 12.47. Ash, 3.14. Crude protein, 8.58. Now, the crude protein has run as high as 14 per cent. I want to bring that out. This was pods collected in the wild, and this was a sample that the State Chemist ran for us on that. Fats 2.12. Fiber, 17.73. Carbohydrates total 55.96.

President Davidson: I am afraid we will have to close this if we are to get on at all. That's the most authoritative information we have ever had, I think, in this Association about honeylocust. I am sure we have been enjoying it and have been benefited by it immensely.

On the possibilities of filbert growing in Virginia, Dr. Overholser will now give you a talk.

[Footnote 18: According to botanical authorities, the honey locust is polygamo-dioecious; that is, it generally has most of its male flowers on one tree and most of the female flowers on another tree, but the trees are not 100 per cent pure in this sex division. In my personal observations of flowers on grafted trees, including Millwood and Calhoun and scores of seedlings, both "male" and "female," I never found any pollen produced in flowers of the "female" trees, but nearly all "male" trees in the Tennessee Valley will have occasional catkins with one or more perfect flowers near their terminal ends (the basal flowers being staminate on the same catkin.) The functionally perfect flowers on such "male" trees have been observed to set from one to many pods in certain years, but such pods are generally small as compared with those borne on "female" trees in the same locality, and I have never observed a heavy pod crop on any "male" tree. Grafted trees of Millwood and Calhoun selections in Tennessee were observed to set pistillate flowers, but no pods (or very few) matured on them unless there was a "male" tree in flower within insect-flight distance from them. (At Auburn, Alabama, there were wild honeylocusts, including "male" trees, within a half-mile of the Hillculture planting of grafted honeylocusts when I saw it in 1943.)

I do not argue that no pollen is ever produced by Millwood or Calhoun flowers some probably is (though its demonstration might require almost microscopic examination, in contrast with the easy finding of pods on "male" trees.) But, in the practical culture of fruiting honeylocusts, and in our present scope of knowledge of their pollination requirements, our plantings should include a handful of seedling (thornless) trees or else some grafted trees of a thornless "male" selection such as the Smith, in a ratio of about 1 Smith to 10, say, of Millwood.

It is unfortunate that the presumed male mutants of the fruiting varieties, reported above by Mr. Moore, were destroyed when the Hillculture plots at Auburn were discontinued. Perhaps similar ones will show up elsewhere, and they will be worth looking for. Meanwhile, the Smith variety (originally propagated through a mixup in scionwood collection), has been demonstrated to be a satisfactory pollinator for Millwood and Calhoun, and it, as grafted, is also a thornless tree. Perhaps any thornless male seedling honeylocust tree, if its flowering period coincides with that of the fruiting variety, might serve equally well.--Note by J. C. McDaniel.]

Possibilities of Filbert Growing in Virginia

E. L. OVERHOLSER, Head, Department of Horticulture, V. P. I., Blacksburg, Virginia

More than four-fifths of the United States filberts are grown in Oregon and nearly all the rest are produced in the State of Washington. Prior to 1933, total filbert production in these two states did not exceed 500 tons, but production has since increased steadily and in 1945 it amounted to 5,320 tons. The value of filbert production in the U. S. in 1945 was about 3 million dollars.[1]

As a wild hazel is native of Virginia and as filberts have been profitably grown, especially in Oregon and Washington the question is often raised as to whether hazelnuts or filberts could not be grown commercially in Virginia. It has been suggested that if varieties now available are not successfull in Virginia, perhaps new varieties may be originated by crossing, including inter-specific crosses.

+American Species+

AMERICAN HAZEL. As mentioned, one species, _Corylus americana_ Walt., is native to much of Virginia. Its distribution is from the northeastern states and Canada to Saskatchewan and the Dakotas and south to Florida and the Gulf of Mexico. Its adaptation is much wider than that of the beaked hazels (_C. cornuta_ Marsh or _C. roxtrata_ Ait. and the far western _C. californica_) the two other Corylus species native to the United States and Canada. This native _americana_, species appears at least to have value from the point of view of soil conservation, as food for wild life, and for breeding purposes.

The American hazel is a large thicket-forming shrub, which sprouts very freely after cutting, and the foliage is generally dense. It is found growing on dry, well-drained sites, in both sun and shade. It, however, seldom bears fruit in the shade. The shrub is relatively hardy, withstanding mid-winter temperatures of -40° to -30°F. and is easily transplanted.

The nuts are available in the wild from July through September and occasionally persistent on the plant until December or even February. The nuts average about 250 per pound, with a germination of about 80 percent, producing about 60 usable plants per pound of seed.

Three of the best known varieties of _C. americana_ are the Rush from Pennsylvania, the Littlepage from Indiana, and the Winkler (most hardy) from Iowa. [See footnote following.--Ed.][19]

Incidentally, Thomas Jefferson in his list of plants native to Virginia, as published in his _Notes on the State of Virginia_, which was written in 1781, and published in 1782, in 1784-1785, and in 1787, lists among other plants the "Hazelnut (_Corylus Avellana_)", which apparently should have been called _Corylus americana_ Walters.

_Breeding Filberts in the East._ This brings up the question of filbert breeding in the East. Crane and Wood (1937) have fully reviewed the breeding program with filberts, and the breeding of filberts, for the East may be briefly referred to here. Tho pollen from _C. californica_ and _C. americana_ apparently does not function on the pistillate flowers of European varieties, (_Corylus avellana_ L. and _C. maxima_). Since however, _C. americana_ is useful as a pistillate parent, it is possible that _C. californica_ may be similarly used.

The workers of the United States Bureau of Plant Industry are primarily testing first-generation hybrids resulting from crosses with the pistillate parents Rush,[20] Littlepage, and Winkler of _C. americana_ and pollen from varieties of _C. avellana_ native of Europe, northern Africa, and western Asia, and of _C. maxima_, the filbert of southeastern Europe and western Asia. Other pollen parents were _C. colurna_, (Turkish hazel, native of southeastern Europe and western Asia) and _C. heterophylla_ Fisch., (various leaved hazel from eastern Asia.)

Crane and Wood (1937) suggest that varieties of high merit should be developed for home plantings over much of the region from lower New England and Great Lakes on the north, and to the Potomac and Arkansas Rivers on the south, and that much of Wisconsin, southern Minnesota, South Dakota, and Nebraska might also be included.

Dr. Crane writes, by letter dated July 27, 1948, that he has as a result of breeding work, which was started many years ago, two new varieties that have been placed in the hands of nurserymen for multiplication. These varieties are at the present time carried under the numbers of 1667 and 2336, These are hybrids between the European filbert (_Corylus avellana_ L.) and the native American hazelnut (_C. americana._) At the Plant Industry Station at Beltsville, Maryland, these two varieties have been outstanding in their yielding ability, hardiness, and quality of nuts produced. Dr. Crane does not think, however, that these varieties may very materially change the situation as regards commercial filbert growing in the East and in the South.

Because of the conditions prevailing during the last war, nurserymen have not made as much progress, in propagating these new varieties as had been originally hoped. Dr. Crane plans to release these varieties for extensive plantings just as soon as there are sufficient plants in the hands of the nurserymen to warrant their being called to the attention of the general public.

HILLCULTURE PROJECT. The Department of Horticulture of V.P.I, has what is called a Hillculture project, with Professor R. C. Moore in charge. Among the materials planted in connection with these studies are filbert varieties to determine their possible value on hill farms in the mountainous regions of Southwest Virginia as a source of additional food and supplemental income for such families. The Forestry Division of TVA has co-operated in supplying not only propagated plants of filberts, but also of walnuts and seedlings of chestnuts.

Among the filberts now being grown are six German-named varieties from the Hillculture Division of the Soil Conservation Service, Glenn Dale, Maryland, planted as rooted cuttings in 1941. The German varieties, are as follows: (1) Barr's Spanische; (2) Neue Riesennuss; (3) Fruhe von Fruendorff; (4) Schliesserin; (5) Eckige Barelloner; and (6) Vollkugel.

In addition five varieties, including two of the Jones numbered seedlings from crosses between the American hazel and the European filbert, purchased from the J. F. Jones Nursery[21] of Lancaster, Pa., were planted in 1947. These are the following: (1) Jones 185; (2) Bixby (a Jones hybrid), (3) Cosford, (4) Italian Red; (5) Large Globe and (6) Medium Long.

Seedlings of the American hazel have also been planted. Dr. Crane may be able to send the V. P. I. Department of Horticulture a few plants of his seedlings 1667 and 2336 to include among the variety plantings.

+Some Limitations of Filbert Growing in Virginia+

DISEASES. Possibly the present most serious limitation to commercial production of filberts in Virginia is the Filbert Blight or Black Knot (_Cryptosporella anomala._ (PK) Sacc.). While this fungus results in little damage to native species (_C. americana_) it does spread rapidly and with serious results to European varieties in the State. Possibly the seriousness of the disease has been lessened by the eradication of native hazel plants on roadsides, fence rows, and in the wild nearby, which serve as hosts for the disease.

It is present on the American hazel, but does little damage to the plant. The disease, however, as mentioned, is a serious menace to either European varieties or to the present hybrids resulting from _C. americana_ x _C. avellana_. The control to date is to prune off and burn affected parts. Mr. George Slate has mentioned that Mr. S. H. Graham of Ithaca, New York, has a number of hybrids between _C. americana_ and _C. avellana_ that have been subjected to severe attacks of Filbert Blight and a few of these have to date escaped, although the others have been destroyed by blight.

The bacterial blight present on the Pacific Coast apparently does not occur in the East.

INSECTS. A second limitation is the problem of the attacks of insects. Dodge and Rickett (1948) report that _Corylus_ may be affected by a leaf-damage from the feeding of leaf-hoppers (_Phepsins ishida_; _P. tinctorius_), which may involve less than half the leaf or may extend to the entire leaf. The first leaves to be infested are those next to the ground, which are affected early in July. Most of the damage ceases by the first week of August. Control is by spraying with nicotine sulphate and soap on the undersides of the leaves in late June or early July, repeating at the end of a week.