281 



New Jersey Stations, Bulletin No. 72, October 4, 1890 (pp. 27). 



Plant-lice and how to deal with them, J. B. Smith (illus- 

 trated). — "During the spring and summer of 1890 plant-lice of all 

 species were excessively cotnmon and injurious. Tiiey infested wheat, 

 cabbages, peach and cherry-trees, melons and other cucurbitaceous 

 vines, orchard grass, clover, roses, and chrysanthemums. 



" Fortunately the same climatic conditions which favored the unusual 

 development of the lice favored also the propagation of the fungoid 

 diseases, which, however, attacked the species very unequally. The 

 pests on orchard grass and on clover were carried off in masses, so that 

 their destruction may be attributed principally to this feature. The 

 wheat louse suffered more from parasitic attack and from the attacks 

 of predaceous species. The peach and cherry species were quite ex- 

 empt from both parasites and disease, while the melon louse seems to 

 have been parasitized quite extensivel3\" 



This bulletin includes general statements regarding the Aphididce, 

 accounts of injuries committed the present season in New Jersey, 

 descriptions of the insects and their life history, accounts of parasitic 

 and other natural enemies, and suggestions regarding renvedies for the 

 following species: wheat aphis {Siphonopliora avenw, Fab.), cabbage 

 aphis {Apliis hrassicce, Linn.), black peach aphis {Aphis persicm-niger^ 

 E. F. Smith), cherry aphis {Myzus cerasi, Fab.), and melon aphis {Aphis 

 cucumeris, Forbes). The article is illustrated with sixteen figures. 



New Jersey Stations, Bulletin No. 73, October 6, 1890 (pp. 19). 



Analyses and valuations of complete fertilizers, E. B. 

 Voorhees, M. a. — " The chemical analysis of the commercial fertil- 

 izers sold in the State was assumed by the station on its establish- 

 ment in 18S0. In that year 64 samples were analyzed, of which 31 

 were complete fertilizers, representing the product of 21 manufacturers. 

 Of the 540 samples received in the laboratory this year, 20(3 represent 

 the different brands of complete fertilizers of Gl firms." The chief 

 causes of this increase are — / 



(I) Demands for special crop fertilizers; (2) the increasing number of small fac- 

 tories ; (3) a growing tendency on the part of large dealers to have goods prepared 

 according to their own formulas ; (4) the increased efficiency of the system of in- 

 spection adopted by the station in 1884. 



That the multiplication of brands is not desirable is no longer a question ; the 

 number examined in 1880 would have been sufficient to cover all the special crop and 

 soil requirements of the StatC; quite as well as the large number now demanding the 

 attention of the farmer. The quality of the fertilizers and the quantity applied are 

 more important factors in increased crop production than slight variations in the 

 relative proportions of the nitrogen, phosphoric acid, and potash contained in them. 



Tabulated results of the analyses of 126 complete fertilizers are given. 

 A comparison of these with the manufacturers' guarantees of the 



