NEW YORK STATE MUSEUM 



5/ 



Percentage of wheat tillers infested with Harmolita (joint-worm) galls 



1921 



COUNTY 



Xo. 

 fields 

 ex- 

 amined 



HARMOLITA TRITICI 



HARMOLITA VAGINICOLA 



ALL 



HAR- 



MOLITAS 





Max. 



Min. 



Aver. 



Max. 



Min. 



Aver. 



Aver, 

 per cent 





5 



5 



7 



9 



27 



8 



10 



14 



3 



7 



3 



4 



11 



13 



13 33 

 1-54 

 1-33 



24.29 



30.67 



24 

 3-55 



11.97 

 6.67 

 533 

 1-33 

 5- 33 



14.67 

 6.67 





3.20 

 31 



a 39 



6.99 



4-93 

 4-33 



.98 

 4-49 

 3-56 

 2.67 



.89 

 2.66 

 5-10 

 1. IS 



5-33 



2.67 

 1-33 



1-33 

 2.07 





2.13 



.20 

 .16 



• 33 



.24 



533 

 .31 



a 39 

 6-99 



5.13 



4-49 



.98 

 4-49 

 3.56 

 2.67 



.89 

 2.99 

 5-34 



LIS 





Erie 





Livingston 













Ulster 











A summarized tabulation by counties for the four-year period, 

 1 91 8-2 1 inclusive, indicates a local abundance of the wheat joint 

 worm for the first two years of the period and a considerable reduc- 

 tion in its numbers for the last two years. 



Harmolita tritici infestation; summary by counties 



County 



Albany .... 

 Cayuga. . . 

 Columbia . . 

 Cortland . . 

 Dutchess . . 



Erie 



Genesee . . . 

 Jefferson. . 

 Livingston. 

 Monroe. . . 

 Niagara . . . 

 Oneida .... 

 Onondaga . 

 Ontario . . . 



Orleans 



Oswego 



Schuyler... 

 Seneca .... 

 Suffolk. . . . 

 Tompkins . 



Ulster 



Wayne .... 

 Wyoming.. 

 Yates 



IQI8 



1919 



1920 



1921 



% 



% 



% 

 1.89 



% 





11.82 



.87 



3 .20 







.66 



• 31 





.24 



"1.42 







.25 



•33 



.39 



17.33 



952 



3-32 



6.99 



5 









24 



950 



3-42 



4-93 





9.24 



389 



4-33 





3-97 



1.94 



.98 



4 











8.70 



I.63 





12. s 



I37I 



5-80 



4-49 



12.69 



IS- 29 

 2.33 



3-23 



3-56 



30 



8.67 







30 





8.27 



2.67 



8 









12 



2 



133 



.89 

 2.66 





II.42 



3.18 



510 



26 



2.68 





I. IS 



4 



10.59 







The relative abundance of the wheat sheath worm appears to be 

 governed by much the same conditions as those affecting the wheat 

 joint worm and in the following summarized tabulation in relation 



