4 ANNUAL REPORTS OF DEPARTMENT OF AGRICCLTUKE, 1^53 
Fruit and nut insects 63 
Citrus blackfly eradication in Mexico 63 
Cooperative citrus blackfly survey and control work continue in 
Mexico 53 
Large-scale citrus blackfly eradication campaign in northern 
Mexico 
Cooperative quarantine program in northwestern Mexico 54 
Introduced parasites greatly reduce citrus blackflies throughout 
Mexico 64 
Fruit By investigations in Hawaii 55 
Scores of insecticides evaluated for fruit fly control 55 
Bait sprays protect mangoes from fruit flies 55 
DDT residual spray developed for fruit packing-house interiors.- 56 
Male oriental fruit fly annihilation effective in control 5G 
Smooth Cayenne pineapples not a satisfactory oriental fruit fly 
host 57 
Mainland climates in which fruit flies might survive studied 57 
Cooperative biological-control program continued 57 
Treatments permit movement of fruit from Hawaii 58 
Mexican fruit fly control 58 
Codling moth resumes important role 59 
Two new mite species spread to Midwest apple orchards 59 
Introduced oriental fruit moth parasites become established 
Two leafhoppers dominant in western X virus disease transmission.. 59 
More effective controls developed for pecan pests 60 
Vectors of quick decline disease of citrus sought 60 
First-instar European chafer larvae most susceptible to DDT 61 
Hall scale eradication 61 
Sprays nonpoisonous to natural enemies of apple pests investigated 62 
Honey bees and other pollinating insects 
Antibiotics effective against destructive honey bee diseas ss ,; '- 
i sterilization rids pollen of foulbrood contamination 62 
Honey bee sex now determinable in early larval static 
Hairless honey bee mutation found 
Two-queen colonies outproduce those with single queen 63 
Bees prefer cane sugar sirup to any other 63 
1'nheated hives equal to those electrically heated 63 
Direct-drive increases honey extractor capacity til 
Bees may reverse preferences for alfalfa and red clover 64 
Bees from a different environment prove best alfalfa pollinators 64 
Bee-trapped pollen withstands subzero temperatures 65 
[] secticides on cotton and alfalfa cause heavy bee mortality 
Melissodes \< valuable cotton Hower pollinator 
Foreign parasite introduction-. 
I Qued progress in Klamath weed control 67 
Foreign plant quarantine activities 
Trai -it inspection 
'ideation 69 
Economic inseel detection and reporting service completes full year 70 
Control of plant di» i 1 () 
Improved methods increase barberry eradication accomplishment- TO 
Accomplishments in white pine blister rusl control 72 
Halogeton Burveys 74 
i.'- ilatorj activities to control phony peach and peach mosaic 74 
I vectors are lifetime carriers of phony peach disease virus 75 
omic damage bv phony peach disease traced to Bingle vector 75 
Golden nematode control 76 
Surv< 76 
Isolated infestation at Mount Sinai treated 76 
latory activities " 
Search for a dip to control golden nematode intensified 77 
Tobacco cyst nematode VI 
>eetle investigations and regulatory activities 77 
Mill. of Japanese beetle grubs well distributed •_• 
Japanese beetle pai irvive two decades ,N 
In ea i of the Japane e beetle ^_ s 
injection treatmenl for balled nursery stock promising 79 
Japanese beetle regulatory activities 79 
