BUREAU OF ENTOMOLOGY AND PLANT QUARANTINE £ 
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Fruit and nut insects 36 
Oriental fruit fly investigated 36 
Wide variety of control measures found available 36 
Foreign parasites vigorously attack oriental fruit fly in Hawaii. _ 36 
Tropics searched for oriental fruit fly parasites 37 
New commodity treatments ease pinch on fruit exports from 
Hawaii 37 
Several chemical controls effective against oriental fruit fly 37 
Eradication of oriental fruit fly nearly accomplished on Lanai 38 
Life-history studies develop basic information 38 
Citrus blackfly investigated 38 
Survey on citrus blackfly continued 38 
Citrus blackfly fought in Mexico 39 
Imported citrus blackfly parasites thrive in Mexico 39 
Experiments confirm value of parathion in control of scale insects on 
citrus 40 
Improved methods of applying insecticides in orchards studied 41 
Methoxychlor promising against orchard pests and Japanese beetle. _ 41 
New insect vectors of virus diseases of stone fruits found 42 
Two species of aphids determined as vectors of strawberry virus 
diseases 43 
Materials for controlling most pecan insects available 43 
Plum curculio yields to various materials 44 
New insecticides valuable in control of oriental fruit moth 45 
Parasites combine with insecticides to control oriental fruit moth 45 
Ladybird beetles withstand DDT sprays 46 
Progress made toward eradication of Hall scale 46 
Frost in Texas groves makes control measures against Mexican fruit 
fly unnecessary 46 
Quicker vapor-heat sterilization treatment under test 47 
Truck-crop and garden insects 47 
Control campaign against sweetpotato weevil continued 47 
Growers and packers benefit from control of sweetpotato weevil. _ 47 
Extensive farm areas freed from sweetpotato weevil 47 
Educational campaign stimulates control efforts by growers 47 
Alternate insecticide nontoxic to humans developed for control of 
sweetpotato weevil 48 
Systemic insecticides make pea plants toxic to pea aphid 48 
Red spiders succumb to systemic insecticide 49 
Airplane sprays for control of pea aphid studied 50 
Lindane in transplanting water protects tobacco seedlings from wire- 
worm injury 51 
Toxaphene may affect odor of flue-cured tobacco 51 
Effect of insecticides in soil on certain crops studied 51 
New insecticides control leaf miners 53 
Control of onion thrips improved 54 
Aphids transmit virus of dahlia mosaic 54 
Zineb fungicide has incidental insecticidal effect on pickleworm and 
melonworm 54 
Importation of European insect parasites 55 
Chemistry of insecticides 55 
Allethrin adopted for use in aerosols 55 
Respiratory devices give satisfactory protection against organic phos- 
phates and chlorinated insecticides 1 56 
Method for determining particle size of aerosol devised 56 
Systemic action of octamethyl pyrophosphoramide studied 56 
Specifications for aerosol formulations and equipment prepared 57 
Proposed Federal specifications for emulsion concentrates and wettable 
powders drafted 57 
Specifications for botanical wastes used as carriers for dusts that 
protect grain prepared 57 
New analytical procedures for insecticide residues developed 58 
New nicotine combinations selected for field testing 58 
Insect cholinesterase found to differ from human enzyme 59 
