884 THt: la'.STS of nova ScoTIA. -FHASEii. 



species, l)ut no injury to the Inltcr plants has been reported 

 from Nova Scotia. Control measures would be the destruction 

 of the atl^'ccrcd parts in the fall before the dispersal of the 

 Bpores. 



The "Oraniic Rust" of the raspberry and l^lackbcrry 

 {Gpnuiocuiiia inhrstitialis) is a sc^'ious )»c-t in some i)arts of 

 the TTnited States, attacking the eultixatcd si)ecies. As far 

 as re])orted it is confined to Avild species in Nova Sco-tia. The 

 mycelium is ]')erennial so that to combat tbi-; rust the dis(>ased 

 plants should bo dug uj) and burned. 



The aeeial stage of a sedge rust &onleTim(^s occurs on the 

 fruit (d' rhe cultivated gooseberry, '{'his stage usually passes 

 under the name of Aecidium (/rossidariae. It is ])robably not 

 comnKUi enough to call for control measures, which would Ije 

 the destruction of the sedges in the vicinity. 



It lists of llie Cereals: A fcAv colle<-rions of coi'n I'ust liave 

 Ixien nuid(.', but it is not usually common enough to cause any 

 serious injury and has not received much attention. 



The black or stem rust (Pvccinia gra minis) attacks wheat, 

 oats, bjirley. i-ye and many grasses. It has a world wide 

 distribution and does immense damage to the gi-ain cro])s. 



It does noi. seem to be very common about Pictou, but in 

 some parts of the ])rovince it is abundant and must cause 

 much injury to the oat and wheat cro]). li can be re<^x)gnized 

 by llie black unc. .\(u*e(l telia which are usually found on the 

 stem, tliougli I bey may occur on the leaves and sheaths. 



The aeeial stage is on the barberry, bnt this shrub is not 

 common enoiigb td ex])lain its a))])earance year after year. Tt 

 is prol>al)le ibat the barl)errv has little to do with t.be rust in 

 Nova Scotia, and that the aeeial stage i.- usually omitted. The 

 uredospores live for some time and ha\'e been shown to sur- 

 vive, the wintei- even in cold (dimates. Another theory is that 

 the uredospores are carried from more southern countries, 

 where they snr\ive the winter, by the wind, and thus the spring 



