. Bulletin of the U.S. Department of Agriculture. Agriculture. i ioiii^.^..ii UNITED STATES DEPARTMENT OF AGRK ULTURE mA BULLETIN No. 1040 g^^ ' ' ^ Contribution Trpm the liureau of Kntomolotiy L. O. HOWARD, Chief. Washington, I). C. PROFESSIONAL PAPER April 12. 1922 CONTROL OF THE CITROPHILUS MEALYBUG/ r.y I{. S. WoGi.LM,-' JJnlomoloyist, and A. D. Bokdkx/ Assistfrnt EntomoloyiHt, Fruit Inflect In if litigations. Introduction CONT Page. 1 ENTS. Page. History and distribution '^' Comprehensive demonstrations of ::: 3 4 - - '8 Host plants Natural enemies •Summary 10 Description and life histor
Image details
Contributor:
Book Worm / Alamy Stock PhotoImage ID:
RGB2YCFile size:
7.1 MB (189.8 KB Compressed download)Releases:
Model - no | Property - noDo I need a release?Dimensions:
1709 x 1462 px | 28.9 x 24.8 cm | 11.4 x 9.7 inches | 150dpiMore information:
This image is a public domain image, which means either that copyright has expired in the image or the copyright holder has waived their copyright. Alamy charges you a fee for access to the high resolution copy of the image.
This image could have imperfections as it’s either historical or reportage.
. Bulletin of the U.S. Department of Agriculture. Agriculture. i ioiii^.^..ii UNITED STATES DEPARTMENT OF AGRK ULTURE mA BULLETIN No. 1040 g^^ ' ' ^ Contribution Trpm the liureau of Kntomolotiy L. O. HOWARD, Chief. Washington, I). C. PROFESSIONAL PAPER April 12. 1922 CONTROL OF THE CITROPHILUS MEALYBUG/ r.y I{. S. WoGi.LM, -' JJnlomoloyist, and A. D. Bokdkx/ Assistfrnt EntomoloyiHt, Fruit Inflect In if litigations. Introduction CONT Page. 1 ENTS. Page. History and distribution '^' Comprehensive demonstrations of ::: 3 4 - - '8 Host plants Natural enemies •Summary 10 Description and life history Seasonal history 4 e 20 INTRODUCTION. In the fall of 1913 a mealybug infestation was noted on citrus at Upland, Calif., over an area of approximately 3 acres. At first it Avas assumed to be the common mealybug {Pseudoeoccus citri Risso), a species highly damaging in some citrus localities but never before reported in the Upland district. Growers were considerably alarmed over the discovery, knowing the severity of this pest and the inef- fectiveness of control in other localities. Considerable damage was done to the infested groves in a hasty attempt at eradication by fumigation. At a convention held at Ontario, Calif., on January 30. 1914. the seriousness of the problem was discussed, although no real solution was evolved. A specific determination was made at t< time b}^ Essig* as Baker's mealybug {PKeudococcus w/iHtimus E!hrh.), a species then considered as of minor importance to citrus. In September, 1915. Clausen, ^ after a brief investigation of the insect, ' Pseudoeoccus gahani Green; order Hemiptera, suborder Homoptera, family Coccidae. 2 Resigned September 11, 1920. ^ Resigned December 5, 1921. 8, p. 30-35. 1915. 78472—22 1. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. United States. De