NEW YORK STATE MUSEUM 



5; 



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



1921 



COUNTY 



Cayuga. . . 

 Columbia . 



Erie 



Genesee . . . 

 Lmngston 

 Monroe. . . 

 Niagara . . . 

 Ontario. . . 

 Orleans . . . 

 Seneca .... 

 Tompkins . 

 Ulster . . . . 



Wayne 



Wyoming . 



No. 

 fields 



amined 



HARMOUT,\ TRITICI 



Max. 



13-33 



1-54 

 1-33 



24.29 



30.67 



24 

 3.SS 



11.97 

 6.67 

 5-33 

 I 33 

 5. 33 



14.67 

 6.67 



Min. 



Aver. 



H.\RMOLIT.A. VAGINICOL.A. 



Max. 



2.67 

 1-33 



I 33 

 2.07 



Min. 



Aver. 



ALL 



HAR- 



MOLITAS 



Aver, 

 per cent 



5-33 

 •31 



6.99 

 S.13 

 4.49 



.98 

 4.49 

 3.56 

 2.67 



.89 

 2.99 

 534 

 I.I5 



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

 1918-21 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 



Albany 



Cayuga. . . 

 Columbia. . 

 Cortland . . 

 Dutchess . . 



Erie 



Genesee . . . 

 Jefferson. . 

 Livingston. 

 Monroe. . . 

 Niagara . . . 

 Oneida. . . . 

 Onondaga . 

 Ontario . . . 



Orleans 



Oswego 



Schuyler. . . 

 Seneca .... 

 Suffolk. . . . 

 Tompkins . 



Ulster 



Wayne. . . . 

 Wyoming. . 

 Yates 



County 



1918 

 % 



1919 



% 



1920 



% 







1.89 





11.82 



.87 

 .66 





.24 . 



1.42 





•2S 



•33 



17.33 



9.52 



332 



5 







24 



950 



342 





9.24 



3.89 





3-97 



1.94 



4 









8.70 



1.63 



12. 5 



13.71 



5-80 



12.69 



iS-29 

 2.33 . 



3-23 



30 



8.67 . 





30 





8.27 



8 







12 



2 



1-33 





11.42 



3.18 



26 



2.68 . 





4 



10.59 . 





• 39 

 6.99 



4-93 



4^33 



.98 



4-49 

 3^56 



2.67 



2.66 

 5.10 

 1. 15 



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 



