6 The Colorado Experiment Station. 
depending on the length of season of the place. At Fort Collins 
Cross cabbage set from the 25th of May until the 5th of July make 
a crop that is usually matured at the end of the growing season. 
For market cabbage, it is best to set plants sufficiently close to keep 
the size of the heads down to five pounds. At Greeley, where 50,000 
pounds per acre have been grown, these cabbages are set in rows 
from 24 to 28 inches apart, and about 14 inches apart in the row; 
thus using 12,000 to 14,000 plants per acre. Cabbage require a 
maximum of fertility, particularly of nitrogen. 
Two serious cabbage insects are found in Colorado. The 
most serious one is the so-called cabbage worm, the larva of a white 
butterfly. In reality there are two species of these worms. Their 
habits are so nearly alike, however, that they may be treated as 
one. The best remedy for these worms is to dust on the plants a 
light application of Paris Green or some of the other arsenical mix¬ 
tures diluted with flour or lime. If this work is done before the 
plants are too large, there will be no danger from poisoning either 
human beings or stock. The green aphis is also frequently destruc¬ 
tive to the cabbages. These are best controlled by spraying the 
plants when the aphis first attacks them, with some contact poison 
as tobacco decoction or kerosene emulsion. Ordinarily these aphids 
do not cause sufficient injury to warrant any treatment. 
Cauliflower .—Cauliflower is one of the crops that is especially 
adapted to Colorado conditions, and should be in every garden, even 
if not for commercial purposes. Cauliflower matures even at an 
altitude of 8,500 feet. For the past three years this crop has been 
experimented with in a small way at the Agricultural College and 
in various parts of the State. This vegetable is peculiar in its 
demands of soil, climate, etc. In the East, where it is grown for 
market purposes, it is thought to be doing well if one-half the 
plants make heads that weigh from one to two pounds. In the 
high altitudes of Colorado, as in the San Luis Valley, Middle 
Park, and Aspen, it is not uncommon to find heads that measure 
12 to 14 inches in diameter and weigh six to eight pounds. We 
believe this vegetable in a short time will be grown, not only for 
home use, but for shipping East to the big markets of the United 
States. The only difficulty in growing cauliflower in mountain 
districts is that where gardens or fields are near uncultivated areas, 
the prairie dogs, ground squirrels, and other small animals are apt 
to find the vegetables toothsome and are not willing to wait until 
the crop is ready for harvest. 
During the season of 1910, plants were grown at the Ex¬ 
periment Station for experiments in different parts of the State. 
About 1,000 of these plants were sent to Del Norte. About the 
same to Grand county, and an equal number was set in the fields 
