The Fayette falcon. (Somerville, Tenn.) 190?-current, 1915-07-23

Is recommended before susceptible
crops, including cotton, are grown
The susceptible crops should not be
grown for more than one or two years
thereafter before the rotation with i'm.
mune crops should be repeated. When
the disease is less severe, one or
two-year rotation will do much to put
the land in condition.
The following is a list OF crops
which are largely or entirely immune
to root-knot; Barley; bean, velvet;
oeggarweed, Florida; chufas; corn;
eowpea, Brabham; cowpea, iron; cow
pea iron hybrids; grass, bermuda:
grass, crab; grasses NEARLY ALL;
kafir, millets (nearly ALL; oats. win.
ter; peanut; rye; sorghum; wheat;
milo
The susceptible crops previously
listed should never follow one anoth.
er in a rotation as the root-knot dam.
age increases each year If the first
crop should escape serious injury. the
nematodes win increase in the soil to
such an extent that the second crop
will be almost sure to show a decided
loss, and hence immune crops should
always be alternated with susceptible
ones.
With regard to winter legumes
such as crimson clover, bur clover.
Japan clover, and the yetches, suffi.
cient observations have not yet been
made to warrant any general state
ment. These plants are listed as mod.
erately to severely attacked by root.
knot, but the nematodes are not very
active during the period between 90
tober 10 and April 10. when these
crops are usually grown. They may
therefore, escape serious injury.
Best Rotations to Use.
While no recommendation can be
given that will apply to all situations
and soil types. a typical rotation that
can be modified to fit any condition
is suggested. For land infested with
both wilt and root-knot the following
treatment has been SUCCESSFULLY used
by many farmers: Beginning in the
fall, SOW winter oats If they can be
got in early enough to make a
fairly good growth before 1t is neces.
sary to pillow the land for the next
crop. Pillow the oats under for green
manure and plant corn with Iron or
Brabham cowpeas between the rows,
putting in the corn at the usual time,
about March Is to 20 for middle Geor-
gia and South Carolina. In the fall
SOW q winter grain; this can be cut
for hay or allowed to ripen. Cowpeas,
either the Iron or Brabham variety, |
may then be broadcasted or, better,
planted in two-foot drills, where they
can be cultivated once or twice. The
cowpeas may be saved for seed or cut |
for hay and followed by another crop
OF winter grain. This should be plowed
under in the spring In time to plant
wilt-resistant variety of cotton the
third year Wheat. rye, or barley may
be substituted for oats as winter |
grain crop, and velvet beans for the
Iron or Brabham cowpeas In the more
southern districts ANY Of the other
immune crops included in the list
may be used in the rotation.
Considerable reduction in the nema,
tode injury will follow the use of q
one-year rotation composed Of two
winter grain crops with a crop of vel,
vet beans or resistant cowpeas grown
the intervening summer In one case
in Georgia. the growing Of a single
crop of Iron cowpeas on wilt and
nematode-infested land, where rs per
cent OF the previous cotton crop was
killed. resulted in a reduction Of the
loss In the cotton crop the succeeding
year to less than 10 per cent. as
against a loss OF 80 per cent on adjoin.
ing land planted the previous year in
cotton instead of Iron cowpeas. When
the dnjury is as severe as this. how.
ever, 1t is usually more profitable to
practice two-year or three-year rota,
ton.
Those wishing complete advice OF
the departments specialists in han.
ding root-knot alone. cotton wilt and
root-knot combined with cotton wilt,
should write to the editor and chief Of
the division of publications, United
States department OF agriculture,
Washington, for the new issue Of
Farmers Bulletin 625. Cotton wit
and Root-Knot