14 



EXPERIMENT STATION BULLETIN 



HOURS 



40 



35 



30 



25 



20 



15 



10 

 5 

 





Bl 



H 



25 



20 



I 5 



10 



5 







I 5 



10 



5 







20 



I 5 



10 



5 







2 



i 



B2 



W 



B3 



r-H 



B4 



APRIL 



MAY 



JUNE 



JULY 



Figure 10. — Seasonal spray schedules on four farms which obtained 



very good control 



