4 Department Cireiilar 263, U. S. Dept. of Agrienlture. 



severe infestations occur at several points in the Ozark region of 

 Missouri, and in southern Illinois and Indiana. The Missouri Eiver 

 region in Nebraska, Kansas, and Missouri, centering about St. Joseph, 

 Mo., at present is almost entirely free from the scale. Interior 

 Kansas is also comparatively free from this insect. 



In the Ozarks of Arkansas the most serious damage by the scale 

 has been caused in the northwestern corner of the State. Orchards 

 in the vicinity of Pea Eidge, Bentonville, and Centerton have been 

 unusually hard hit. Orchards south of Bentonville and Rogei-s have 

 not been so seriously damaged. 



SERIOUSNESS OF INJURY IN ARKANSAS ORCHARDS. 



The orchards which have been most seriously injured by the 

 San Jose scale have been those which were the most productive 

 and well cared for. Orchards in which the trees have made a vijr- 









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Fig. 1. — Trees attacked bj' the San Jose scale, dehorned, and ultimately killed. 



orous growth are the ones where the scale has thriA'ed. Figure 1 

 shows a block of trees in an orchard formerly one of the most pro- 

 ductive in the Bentonville vicinity. These trees were cut back in 

 the fall of 1921, and the following summer, when the photograph 

 was taken, they failed to show any new growth. If the scale had 

 been controlled by the spray application that was made during the 

 dormant season of 1920-21, most of the trees in this orchard could 

 have been saved. This orchard was so luird hit by the scale that 

 30 acres out of a total of 35 acres of trees were killed in two seasons. 

 Five hundred acres of bearing apple trees killed by the San Jose 

 scale would be a conservative estimate of the damage caused in 

 northwestern Arkansas. 



I 

 I 



