ENTOMOSPORIUM. 481 



(6 oz. in 26 galls, water) have both produced good results in 

 checking the disease.^ 



E. mespili (D.C.). (See Stigmatea mespili, p. 210.) 



SCOLECOSPORAE. 



Brunchorstia. 



Brunchorstia destruens Erikss. (£. pini AUesch.). In Nor- 

 way almost all the plantations of Austrian black pine {Finns 

 Laricio) from five to thirty years old have become diseased and 

 died out. Similar ravages have also been observed in Germany. 

 Brunchorst ascribes this to a parasitic fungus whose mycelium 

 may be found in all parts of diseased twigs and needles, and 

 whose pycnidia are formed on the killed remains. The disease 

 begins in young first-year twigs, the mycelium growing in 

 the cortex, pith, and wood. The needles are attacked in 

 summer, become brown from the base upwards, and the 

 pycnidia make their appearance under the scale-leaves. 



Brunchorst ^ describes the fungus as follows : Pycnidia par- 

 tially embedded in the tissues of the host-plant ; the smaller 

 ones being simple, the larger divided by complete or partial 

 partitions. The inner wall as well as the partitions of the 

 pycnidium are closely beset with straight basidia, from the 

 apices of which stylospores with two to five septa are abjointed. 

 Paraphyses are never present. The perithecia are black, oblong 

 or rounded, slightly grooved, and 1-2 mm. in diameter; they 

 dehisce by one or more irregular pores in the wall. The 

 spores are very minute (30 — 40 = 3 m), tapering, and rounded 

 at each end. 



Schwarz considers Brunchorstia as a conidial form of Genan- 

 guim abietis already described (p. 251). 



It may be here mentioned that drying-up of pine-twigs may 

 be due to heating by the sun in frosty weather, or to frost 

 itself;* these are, however, quite distinct from the disease just 

 described. 



'Fairchild {Journal of Mycology, Vol. vii.) gives results of treatment with 

 various fungicides on several varieties of pear and quince. (Edit.) 



^"Ueber eine neue Krankheit d. Sohwarzfdhre. " Bergens Museum, 1889. 



'R. Hartig, " Vertrocknen u. Erfrieren d. Kiefernzweige,'' ForstUchnaturwiss. 

 Zeitschrift, 1892 and 1895. 



2h 



