LIME—LIME DISEASES AND PESTS 1243 
infestation becomes serious, thorough 
fumigation of the houses and soil sterili- 
zation will be profitable. 
FE. D. Barry 
Leaf Spot 
Septoria consimilis E. & M. 
The leaf-spot fungus is frequently upon 
wild lettuce plants and occasionally upon 
outdoor lettuce, especially in late seasons. 
The small characteristic leaf spots are 
not difficult to distinguish from anthrac- 
nose. The remedies are confined to avoid- 
ance. 
Tip Burn 
Tip burn of lettuce leaves is often 
brought to notice. Usually it is asso- 
ciated with unsatisfactory watering in 
the greenhouse, or with extreme changes 
to summer weather. The remedy consists 
in the methods of watering employed. 
Bibliography 
1910. Stevens & Hall, 
Heconomic Plants. 
Diseases of 
1909. Dugegar’s Plant Diseases. 
1910. Ohio Experiment Station, Bulle- 
tin No. 214. 
1911. North Carolina Technical Bulle- 
tin 8. 
LETTUCE 
Alaska. 
CULTURE IN ALASKA. See 
Lime 
The lime, Citrus medica, is a small tree 
of the orange family. Its fruit resembles 
the lemon in appearance and character 
but it is much smaller and is not so ex- 
tensively cultivated because not so gen- 
erally in demand. 
There are two varieties, the sour lime, 
var. acida, and the sweet lime, var. Limet- 
ta. The juice of the lime is acid tonic 
and considered a preventive of and rem- 
edy for scurvy. 
The sailors of the British navy are 
sometimes called “lime juicers” because 
the law requires that the crews be fur- 
nished with a weekly allowance of lime 
juice or lemons as a preventive of scurvy. 
Varieties recommended for the districts 
where grown: 
(For Map of Districts, see page 192.) 
District No. 6 
HIGHLY RECOMMENDED—Dessert, Kitchen 
and Market: Rangpur. 
RECcOMMENDED—Ktichen: 
District No. 17 
RECOMMENDED—Mexican. 
District No. 18 
RECOMMENDED—Imperial; Mexican. 
LIME DISEASES AND PESTS 
For the most part the lime is attacked 
by the same diseases and pests as attack 
lemons and oranges, which see. 
Turanj. 
Diplacus Ceroputo 
Ceroputo yuccae Coq. 
General Appearance 
This insect is continually mistaken for 
the regular mealy bugs belonging to the 
genus Pseudococcus. It differs in having 
a tooth on the inner surface of the claw, 
and a row of spine-groups on each side. 
The cottony covering is very dense and 
arranged in broad segmental plates. The 
males are nearly half an inch long, with 
dark and orange-colored bodies, and long 
anal filaments. The cocoons are elliptical 
in shape, white in color and scattered 
among the females. 
Life History 
The young are born alive and soon se- 
crete wax enough to completely cover 
them. The broods appear in the late 
spring and early summer, and are espe- 
cially abundant during the months of 
April, May, June and July. The males 
mature when the females are about two- 
thirds grown; the life period of the fe- 
males being from three to five months. 
This species lives under the ground on 
roots of black sage, Ramona stachyoides, 
and above ground on other plants. As 
an aerial form it does not appear until 
late in the season. The adults in all 
probability hibernate under ground in 
winter. 
Food Plants 
Black sage, banana, orange, lime. 
Natural Enemies 
Coquillett bred an internal parasite 
from specimens taken in Los Angeles 
county. This he named Blastothrix yuc- 
cae Cog. E. O. Essie 
