IV CONTENTS 
Frail and nut Inse I i nued Pati 
p control of sea . 25 
rial] 
on vectors of stone-fruit virui □ 27 
i mealybug at low ebb 27 
■II to combat orieotal fruit By m _. 
rua blackfly in M- dec 28 
ktments to kill fruit flies permil movement und< 
laboratory for study of European chafer. 


DD1 isolated beetle inf( 
Recommended soil treatments injure few plants 
d control activities 31 

\«-w insecticides eflfecti I pests of cotton 
Boll weevil 
BoUworm 
on aphid 
Pink bollworm 
Bait-marsh caterpillar 
r cotton i 
Progress made in basic research on cotton insects 
bollworm quarantine activities 
Its of inspection 34 
Control op.Ta i ions 
Regulatory operations 37 
Cooperative work with Mexico 
Cereal and forage insects 
Grasshoppers 
• mi programs in 1948 protected extensive crop and ra 
Lands 38 
1949 OUtl Ight with new baits applied by airplane 38 
( 'hlordane and toxaphene new weapons to coml at hoppers 
Mormon cricket damage Blight on crop- and range 
Chinch bugs and cutworms require little control 40 
Cotton bags made insect-proof 40 
I ropean corn borer continues to Bpread 41 
Parasites of European corn borer and sweetclover wee\ il imported 41 
Benzene hexachloride and parathion control greenbugs 42 
Toxaphene effective against meadow spittlebug 42 
New insecticides control > nithern corn rootworm in peanut- V2 
White-fringed beetles. 43 
Soil and foliage treatments with DDT subdue beetle- 43 
Effect on plant- of various DDT formulations used to control white- 
fringed beetles . 44 
Chemical studies of insecticides 44 
New insecticides similar to pyrethrum made synthetically _._ 44 
( hemical methods for pa rat I lion developed '-.. 45 
Jn-ect icidal amide isolated from prickly-a-h 45 
Diluent- for in-eet icides SOUghl in agricultural wa-te products 45 
Methods of disinfecting aircraft improved 
Work on mechanical devices for use in pest control coordinated 16 
Imported beetle- eontml Klamath weed on west coast 47 
d other pollinating insects 47 
back of pollination a serious threat to seed production 17 
Boi ey bee- prodigiously active as clover pollinators.. ' s 
Crops compete for bees - ' s 
Wild pollinating insects reared in artificial nests 
Hybrid queens distributed for testing 
\eu insect icides kill only field bees 
Honey bee- bred for resistance to American foulbrood 50 
Sulfathiazole for treating Ameriean foulbrood in experimental Btai 51 
Plastic package-bee containers withstand shipping tests 51 
