SUMMARY OF INSECT COISTDITIONS DUEIISTG 1921. 7 



infested to such an extent that they were refused by canning com- 

 panies. The pest was also very serious in the Provinces of Quebec, 

 Manitoba, and British Columbia. 



In the East-Central States the damage was of record importance. 

 In Ohio the outbreak was worse than any since 1904, and probably 

 the most severe ever recorded. Field corn was reduced from 5 to 10 

 |)er cent of its actual bulk, and in the canning section sweet corn was 

 damaged to about 50 per cent. In Indiana the outbreak was the worst 

 in the past 10 years, the infestation estimated as ranging from 5 to 30 

 per cent. In this State the ear rots were also reported as accompany- 

 ing the earworm injury. In Illinois the outbreak was unusual; 75 

 per cent of the sweet corn was reported as infested and 5 per cent 

 of the grain crop destroyed. Here and in Indiana the outbreak was 

 most conspicuous in the northern half of the State. In Kentucky 

 the outbreak was the most severe ever observed by Professor Garman. 



In Iowa the outbreak was the most serious in the experience of 

 the reporter, which covered six years. In Nebraska the infestation 

 was quite general, being worst in the east and east-central parts of 

 the State. The most serious com earworm outbreak ever recorded in 

 Missouri occurred during the past year, the infestation being prac- 

 tically 100 per cent throughout the State. In Kansas the outbreak 

 was not unusual, destruction of the corn ranging from 3 to 5 per 

 cent. In the western part of the lower Mississippi Valley a similar 

 condition prevailed to that in Kansas, the outbreak being about 

 normal. 



In the eastern part of the lower Mississippi Valley the outbreaks 

 ranged from normal to slightly above normal. In Louisiana toma- 

 toes in the experiment station plats were damaged from 30 to 35 

 per cent. In Alabama the pest was recorded as unusually abundant, 

 while in Arkansas it was not more destructive than during average 

 years. 



In the Rocky Mountain region no damage was experienced, ex- 

 cept in the eastern part of Colorado, east of a line extending from 

 Larimer to Huerfano Counties, where the pest is usually quite 

 destructive. 



In the Great Basin no outbreaks were reported. 



In the Pacific coast region, Oregon reported the insect as fairly 

 abundant in the Willamette Valley, where it has been one of the 

 major corn pests since 1898. A remarkable feature of this insect's 

 habits in Oregon is that it is never recorded as attacking tomatoes, 

 beans, or, in fact, any plants except corn. In California this insect 

 was recorded for the first time as attacking cotton, reports having 

 been received from Glenn and Kern Counties during 1921; the 

 outbreaks, however, were not serious. In the canning sections of 

 •central and southern California the pest was very serious and 



