36 
BULLETIN 1498, U. S. DEPARTMENT OF AGRICULTURE 
The principal known acreage of Kubanka is in North Dakota, 
although it is the most widely adapted of the durum varieties. 
The red durum Pentad (or D-5) ranks second in importance among 
the known durum varieties. Its distribution in 1924 is shown in Fig- 
ure 18. It is grown princi- 
pally in North Dakota and 
South Dakota, where stem 
rust frequently occurs, as it 
is the most rust resistant of 
the durum varieties. The 
acreage of Pentad increased 
from 1919 to 1924, because 
of its rust resistance and 
good yields, in spite of much 
opposition to it because of 
its poor quality for the man- 
ufacture of semolina to be 
used in making macaroni and other edible pastes. 
Fig. 18.— Distribution of Pentad wheat in 1924 
area, 341,147 acres 
Estimated 
The Monad (or D-l) variety is a white or amber kerneled, rust- 
resistant durum wheat. Its acreage, shown in Figure 19, is mostly 
in North Dakota, where it 
was developed. The acre- 
age devoted to this variety 
increased from only a few 
acres in 1919 to more than 
84,000 acres in 1924, large- 
ly because of its rust re- 
sistance. Like Pentad, the 
quality of Monad is not 
well adapted for the man- 
ufacture of macaroni, as it 
yields a product of a dull 
grayish color. This has 
limited its commercial value and hence its distribution. 
Fig. 19.— Distribution of Monad wheat in 1924. 
area, 84,203 acres 
Estimated 
Fig. 20.— Distribution of Acme wheat in 1924. 
area, 65,457 acres 
Estimated 
1924 its acreage increased in sections 
Acme is very similar to 
Monad, both being rust-re- 
sistant amber durum wheats, 
but not well liked for the 
manufacture of macaroni. 
The distribution of Acme, 
shown in Figure 20, is largely 
in South Dakota, in which 
State the variety was de- 
veloped. From 1919 to 
where rust losses were most 
severe. 
