MAINE AGRICULTURAL EXPERIMENT STATION. 



31 



Fig. 11. (After Packard). 



Fig. 12. Male. Fig. 13. Female. 



(Fig. 12 and 13 from Me. Ag. Exp. Sta. Bui. 161). 



COMBATIVE MEASURES. 



For the orchard or shade trees there are several practical 

 measures which have proven successful the past season in pre- 

 venting serious injury from the saddled prominent. 



Spraying. — This species is susceptible to arsenical poisons 

 and the caterpillars readily died on apple trees which were thor- 

 oughly sprayed. Arsenate of lead will kill these caterpillars 

 and should be applied as soon as they begin appreciable work. 

 Applications from the middle to the last of June would prob- 

 ably get all these caterpillars which hatched upon the trees. In 

 case a migration to an orchard from an infested forest growth 

 is feared, the orchard should be sprayed as soon as the cater- 

 pillars begin to travel in search of fresh food; or if trees not 

 already attacked are banded with a sticky substance, as for 

 canker worms, the ascent of caterpillars up the trunk will 

 effectually be prevented. 



Jarring and banding'. — The saddled prominents are readily 

 shaken from the branches. The cool of the morning is the 

 most propitious time for jarring. The caterpillars once dis- 

 lodged, their reclimbing can he prevented by banding. 



A material useful for this purpose is sold under the name of 

 Tree Tanglefoot. This substance consists principally of resin 

 softened by the admixture of suitable oils. It is quite similar 

 to that used in the manufacture of adhesive fly-paper, and is 



