SPHAEROTHEl A. 



173 



Sphaerotheca (Podosphaerai castagnei Lev. ( r.ritain and 

 U.S. America). The Hop-mildew. The mycelium i> found mi 

 all parts of hop-plants, causing con>ideiuUe damage, especially 

 when it attacks the young inflorescence. The peritheem have 

 recumlieiit, brown, simple appendages. Thi^ species appeals 

 chiefly on various Compositae, Kosaceae (esp. ,s/ */'/"". Ulmarid), 

 (,'ucurhitaceae, < icraniaceae, etc. S. n-auer n-pi>rts it a- \n\ 

 injurious to applr-tri-cs. 



! ' 



> i- very ]<trt i tlic inflorescences. Pwo specimens are much leas 



til. ill tin: Others. (v. TulnMlf 1'lmt.) 



Oidium farinosum Cooke. Attack-- \mm- Leaves and calyx 

 of a]']ilr: ii is ca>ily distinguished trmii the oidium-condition l' 

 thr pivccdin- species. 1 



Sph. mors-uvae \'>. >( < '. The Gooseberry-mildew. 1> ~i"-riall\ 



injuriMii.- to A'/'/,,, I ' rn rv/.s-//" and oilu-r sjin-ifv ,,| /,'/A^ \\\ 



America. SpriiNin- with a solution of ]H.ta--iimi sulphide ( .'. 



in 1 'jallon water; at intervals of twenty da\ s is recommended. 2 



// ifir. ! ../. 



(17.5. /'' /ii'/iif H' of Agriculture, /'/"/' for l^syi ,;. 

 I'M it . ). 



