292 



Forty-fourth Report on the State Museum 



killing the curculio, it should be used as strong as the foliage will bear, 

 as in this case, we have to poison the adult insect. For preventing 

 codling-moth injury, one pound of Paris green to two hundred and 

 fifty or two hundred and sixty gallons of water has proved sufficient, as 

 an almost infinitesimal quantity of the arsenite will kill the young cater- 

 pillar just as it is hatched from the egg. In spraying for the curculio, 

 it should be repeated for two or three times at intervals of ten days 

 (or if rain intervenes, then after every rain), as the curculio continues 

 its egg-laying and feeding on the fruit for a longer time than the 

 duration of the flight of the codling-moth." 



How to Mix Paris green. 



Another correspondent, from Penn Yan, N. Y., submits the follow- 

 ing : " I would like information with regard to mixing Paris green 

 in spraying operations. Will the pumps that discharge a part of the 

 liquid in the tanks mix it effectually, or in what way can it be done? " 

 Answer was made through the Country Gentleman, for May 1, 1890, as 

 follows : 



"Paris green mixes readily with water, and only needs to be 

 stirred into it, or to have the water poured upon it and then stirred. 

 The spraying pumps that are furnished with a return hose for dis- 



FiG. 20.— The Field Force Pump Co.'s 

 " Perfection Spraying Outfit." 



Fig. 21— The Goulds' Manufacturing 

 Co.'s Double-Acting Spraying Pump. 



charging into the barrel or tank at its bottom — such as are sold by the 

 Field Force Pump Company (their "perfection spraying outfit;" see 

 Figure 20), by the Goulds' Manufacturing Company (Figure 21), and I 

 presume by other manufacturers — keep the mixture sufficiently and 

 properly stirred. Indeed it is difficult by any other known method 

 to maintain a proper diffusion of the Paris green throughout the 



