19 



RECOMMENDATIONS. 



Begin spraying early in the season. Make the first application 

 before the beetles become numerous and follow it by one or two 

 more a week or ten days apart. 



Use green arsenite or other equally good arsenical, one pound 

 to loo gallons of water, with the addition of enough freshly slaked 

 lime to make the mixture slightly milky in appearance. One 

 pound of whale oil soap to about 20 gallons of the mixture may 

 be added with good results. It will do no harm to use the soap 

 stronger. 



Spray newly planted fields with the poison until the willows are 

 large enough for the machines. 



After the willows are too high to spfay thoroughly by ordinary 

 means, use the machines for catching the insects if necessary. 



Urge the importance of a united efifort on the part of all inter- 

 ested in willow growing. 



PARTIAL BIBLIOGRAPHICAL LIST. 



1884. Riley, C. V. U. S. Dept. Agr. Ann. Rpt. 1884 : 336-340 Refers 

 to damage done in 18S4, food plants and former injuries; life history ; rem- 

 edies, arsenicals, London purple and Paris green, and descriptions of type and 

 variations. 



iS88. MacMillan, Conway. Nebr. Agrl. Bxp. Sta. Bui. 2 : 50-54. Life 

 history ; remedies. Illustrated. 



Meehan, Thos. B. Insect Life, 1 : 51- Letter from stating injuries 

 caused by the willow beetle in 1887 to Carolina poplar, Kilmarnock and 

 New American willows growing in his nursery at Germantown, Pa. 



1889. Lugger, Otto. Minn. Agrl. Bxp. Sta. Bui. 9: 53-55- Life history 

 and brief descriptions of larva and imago ; remedies, arsenicals ; natural 

 enemies. Illustrated. 



Orcutt, I. H. Dak. Agrl. Exp. Sta. Bui. 13 : M-^S- Brief descrip- 

 tions of larva and imago ; remedies, arsenicals ; natural enemies. Illustrated. 



1890 Kent, Geo. H. Insect Life, 3: 338. Quite numerous and destruct- 

 ive on cotton- wood in Franklin County, Miss. 



1891 Bruner, L. Nebr. Agrl. Exp. Sta. Bui. 14: 84-91- Descriptions 

 oflarva and imago; life history; remarks on causes of increase; geograph- 

 ical distribution; natural enemies, several species of Carabidcs and 

 CoccinellidcB ; remedies, arsenicals. 



