
Spray Calendar and Useful Information 
Codling Moth or 
Aphids on Leaf Apple Worm 
CABBAGE—CAULIFLOWER 
Cabbage Worm. Green worms feed upon leaves 
all through season. Use pyrethrum or rotenone 
spray or dust. 
Cabbage Looper. Smooth 
looping caterpillars feed with 
cabbage worms late in sum- 
mer, and require same treat- 
ment. 
Cabbage Maggot. Infest 
stems of early-set plants near 
surface of ground, checking 
growth and often killing 
them. Practice crop rotation. 
Apply calomel-gypsum 1-24 
parts around newly set plants. 
Club Root. Causes knob-like enlargements on 
the roots of cabbage and allied plants. The germ 
often becomes established in the soil; when pos- 
sible avoid such land and the use of refuse from 
old plants on the soil. Be especially careful that 
the seed bed is not infested. Infested land, if 
used, should be treated in the fall with lime broad- 
cast at the rate of 80 bushels per acre, and worked 
in. 
CELERY 
Celery Caterpillar. Feeds upon the leaves of 
celery, parsley, and fennel. Use pyrethrum or 
rotenone spray or dust. 
Leaf Blight and Leaf Spot are two diseases 
showing “rusty” spots on leaves and petioles; the 
latter trouble distinguished by the very minute 
black dots in the discolored spots, often progress- 
ing in stalks after storage. Spray the plants thor- 
oughly in the seed bed with Bordeaux, as infected 
plants are often the means of introducing the 
trouble in the field. If necessary continue the 
spraying after transplanting at intervals of about 
two weeks, up to the middle of September. Before 
covering for bleaching, if leaf spot is abundant, 
dust. with sulphur, and before final storage remove 
infected leaves and dust again. 

Cabbage Worm 
CORN 
Corn Ear Worm. Eats the immature kernels at 
the end of the ear. Use Corn Ear Worm Oil. 
Corn Borer. Ryanex 40-D as directed. 
CUCUMBERS 
Striped Cucumber Beetle. Attacks young plants, 
eating the leaves. Larvae infest the main root or 
stem under ground, often killing the plant. Use 
cryolite or rotenone dust. 
Canker Worm 


Plum Curculio 
CURRANT 
Currant Worm. Devours foliage in May. Spray 
or dust with pyrethrum as soon as leaves unfold. 
Currant Borers. The larvae of two species of 
insects tunnel in the pith of the stems, causing 
the leaves to droop and wilt. Destroy infested 
canes during May. 
Currant Aphids. Yellowish-green aphids on 
under side of leaves, causing them to curl. Under- 
spray with nicotine solution, D-X or Red Arrow. » 
ELM 
Spiny Elm Caterpillar. Clusters of black spiny 
caterpillars often strip certain branches of elm, 
willow and poplar. Remove and destroy entire 
cluster, or spray with lead ar- 
senate. 
Elm Leaf Beetle. Adult 
beetles eat holes through the 
leaves in May, and in June 
and July the larvae or grubs 
eat away the green tissues 
from the under surface. Spray 
with lead arsenate early in 
May to kill egg-laying bee- 
tles, or spray under surface 
of leaves with same mixture 
about June Ist, to kill the 
larvae. Yellow pupae at base 
of trees may be killed with 
spray oil. 
GRAPE 
Grape Plume Moth. Small, green, shiny cater- 
pillars web together the newly-formed leaves at 
the tips of new shoots. Damage more apparent 
than real. Crushing by pinching these leaves is 
the best remedy. Grape Berry Moth. Larvae 
feeds and develops inside the 
berries, and this is the cause 
of most wormy grapes. Spray 
with lead arsenate soon after 
fruit sets, and repeat twice at 
intervals of about ten days. 
Bag the clusters soon after 
the fruit sets. 
Sphinx and Other Cater- 
pillars. Several species of 
horn worms, as well as other 
kinds of caterpllars, feed 
upon the leaves. Spray with 
lead arsenate or practice 
hand picking. 

Larvae of Elm Leaf 
Beetle 
Grape Berry Moth 



