'M NOTE8, 



NOTES- 



Mould growing in solution of Cupric Sulphate. 



Jn aograpfa of PeniriUitirn glaucum, Brefeld remarks (p.3) 



that this mould can withstand the Lnjurious effect of copper 

 sulphate. An instance of this has recently been furnished at 

 Peradcniyii. The Government Entomologist, Mr. E. E. Green. 

 ring to protect his specimens from the ravages of mould-. 

 tried the plan of brushing copper sulphate solution over Ins setting 

 hoard-, but the experiment was brought to an abrupt conclusion 

 by the discovery of Large and flourishing colonies <>f PemciUium 

 glaucum in the Liquid employed. In a few days, the sides of the 

 jar below the surface of the liquid were covered with hemispherical 

 tufts of hyphae from three to five millimeters in diameter; other 

 resting at the bottom attained a Length of three centimetres, 

 while others ol various sizes floated on the Burface 



li tuft contained a few wing scales or hairs which had 

 ■ lit (I by the brush from the -« tting board t<> the solu 

 The hyphae forming the tufts were 2-4 p diameter, and 

 apparently normal. The conidiophores were 50 7<i /( high, 



i. unbranched, bearing sterigmata 6 s /( Long and 2/i 

 ■ r. and spores '■'• i // diameter. Only one branched coni 

 diophore was observed : this was To /( high, and bore one sid< 

 branch halt waj up. Tin- reduction of the conidiophore to an 

 unbi t, hypha, bearing one _ r t ■ . 1 1 1 • ol sterigmata 



be the onlj departure from the aorma] development. 

 ■■I.- found "ti the submerged tufts; those beca 

 • ■ ed to the air through the removal of part of the 



liquid for analyses. Germinating spores were observed on the 

 usuallj m contact with an insect Bcale, and the growth 

 '.f tin-.- continued in a hanging drop when copper sulphate was 



T ; i 1 1 1 / 1 r i l' "'it at tin- iMi 



I'll' solution contained 8 # 56 per cent, ol « •• » | »j •• • r sulphate (Cu 



iO •!• 'Normal 1 Bordeaux mixture, which is considered 



iou fungicide, contain* 1*8 per cent, coppei 

 tulphaf 



T. PETCH. 



