24 
INSECT 
Corn-ear worm..... 
Cottony maple scale 
Cucumber striped 
beetle 
ee 
eee ners 
ee 
eee wens 
Oyster-shell scale .. 
Potato beetle 
ee eee 
sem eee 
ee 
_Tent-caterpillar .... 
DESCRIPTION 
14 in. long, brownish, 
with spots; skin naked, 
greasy 
Conspicuous by cottony 
secretion pushed out 
from under body of fe- 
male 
Yellow-and-black striped 
beetle 
Dark, naked, greasy 
worm : 
Caterpillar, dark- 
bodied, covered with 
hair, building web 
around the terminal 
shoots 
Caterpillar, 24 in. long, 
dark, hairy, with dou- 
ble row of 5 dark spots 
followed by double row 
of 6 red spots behind 
head 
White, naked, 
worm 
small 
Soft-bodied bug covered 
with white powdery se- 
cretion 
Small gray scale sha 
like an oyster = 
Heavy-bodied beetle, with 
yellow wings marked 
with 10 black lines; 
larva red 
Reddish mites sucking 
juices from the under 
sides of leaves 
Small, slimy, gray larvae 
of saw-flies 
Circular, flat, dark scale 
with a raised central 
spot, causing discolora- 
tion of inner bark 
Gray, flat insect with 
small head 
Larva 2 in. long, black 
body with a white line 
through the middle, 
and row of blue spots 
along each side; makes 
webs in crotches of 
limbs 
MISSOURI BOTANICAL GARDEN BULLETIN 
ConTROL 
Dust with a mixture of 
arsenate of lead and 
corn meal (1 tsp. to 1 
qt.) 
10% kerosene emulsion, 
in spring 
Repellent measures; 
protection with cloth 
screens 
Paris green mixed with 
bran and molasses 
Spray with arsenate of 
lead; burn webs 
Masses of eggs destroyed 
with creosote; spray 
with arsenate of lead 
(6 lbs. to 50 gals.) in 
spring 
Dise of tar paper placed 
around roots, carbon 
bisulphide poured into 
hole near plant 
Tobacco extract with ad- 
dition of alcohol 
Lime-sulphur in winter 
Arsenate of lead at fre- 
quent intervals 
Forcible water spray; 
sulphur dusting 
Arsenate of lead 
Lime-sulphur in spring 
and winter 
10% kerosene emulsion 
against young 
Burn webs; spray with 
arsenate of lead 
