16 



BULLETIN 1103, U. S. DEPARTMENT OF AGRICULTURE. 



A few isolated green-bug outbreaks were rej)orted from Missouri, 

 one in Jasper County, continuous with that in Cherokee County, 

 Kans., and two isolated outbreaks in the southeastern part, in Perry 

 and Mississippi Counties, 



In the three States infested by the green bug during 1921 the 

 weather was very uniform, there having been a period of cold 

 weather in November, 1920. (See Table 3 and Fig. 5.) This was 

 followed bj^ a very mild winter, January, February, and March run- 

 ning to 6° F. above normal while February in Kansas was 9° F. 

 above normal. The spring started out with decided excess tempera- 



FiG. 4. — Geograpliical distribution of the green bug in thie United States in 1921 : Heavy 

 shading indicates serious damage ; light shading, threatened damage. 



ture in March. This was followed by a rapid drop in April which 

 carried it below the normal in both Oklahoma and Texas. The 

 spring and early summer were verj^ nearly normal, the temperature 

 rising during August and September to slightly above normal. 



The rainfall throughout this region was above normal through- 

 out most of the winter with the exception of the month of Februar3^ 

 (See Table 3 and Fig. 6.) The spring was about normal up to May 

 when a very decided drought set in. This was followed, however, 

 in June by an excess of rainfall in Oklahoma and Texas of over 3 

 inches. August and September in these last two States were very 

 dry while Kansas was about normal. 



Figure 4 indicates the area of threatening outbreaks in the spring 

 of 1921 (shaded lightly) and the area where damage was recorded 

 (heavy shading). 



