885 



wliole becomes brown anrl lifeless, followod l>y a torn condition. Two or three of 

 these laroe, dead, shredded i)laces may bo all that tlie leaf contains, while the 

 balance is healthy and dee]) green. * * * A carefnl study was made of the I'lnjl- 

 losticia and Cercospora by means of cultures. Each reproduced its own kind in 

 every instance. 



It was ])articularly easy to grow the FhyUosficta upon sterilized petioles in test 

 tubes, and transfers were repeatedly made from pure cultures of this fungus without 

 a trace of Cerconpora apiiearing. The pycnidia would form aud mature in great 

 al)nndance within .5 days, and even upon the surface of the licjuid, af the bottom 

 of the tube, as well as the petiole itself. " * * 



Tills is a rapidly growing fungus, is particularly fond of moisture, .iml lloiirishes in 

 the shade, lieing found usually upon the younger or lower leaves. 



While experiments have not, been made upon this leaf sjiot fungus, it is probably 

 true that the same remedy as that for the ordinary leaf blight (Ccrconpora) apjiiicd 

 in the same manner would prove effective. It will be important to l)egin early with 

 the spraying. 



Celery leaf blight. — A second form of leaf bliglit {Septoria petroseUni, 

 Yiw. ((pii) was observed in 18!)l in Delaware by Professor Chester and in 

 New Jersey by the author. l*ortious of diseased leaves aud the spores 

 of the fungus are illustrated. 



The blight now under consideration often causes tlie whole leaf to become browu, 

 with small black dots scattered over the surface. A plant at all atliu-ted is ({uite apt 

 to have the whole foliage diseased. * * * 



The only other mention of a Scplorla upon celery that the writer has thus far found 

 is by Briosi and Cavara {Funghi Parisiiti Fasceola, 6, 14:4), who figure and present a 

 specimen of the species upon celery, namely, Septoria pclroseHni, Desm., var. apii, 

 V}. &, C, collected at Pavia, Italy, in 1890. The American specimens, while not 

 agreeing closely in the spore measurements, may be considered as belonging to the 

 same variety. 



Celery rust. — While the genuine celery rust {Fuccinia huUata) has not 

 been reported in this country, it is prevalent in Euro^je and may be 

 expected here at any time. A brief illustrated account of this fungus 

 is given in this article. 



A haeteriul ilkease of celery. — This was observed in celery fields near 

 Greenville and Bayonue, New Jersey, especially on the Golden Plume 

 variety. The bacteria and a portion of an affected leaf are illustrated. 

 The bacteria were observed under the microscoi^e, isolated, and grown 

 on celery leaves. 



The affected leaves were badly blotched with brown, the diseased spots having a 

 watery appearance. * * * The germs when introduced into the core of a plant 

 cause this tender portion to decay with greater rapidity than when placed in leaf 

 tissue. ^ * * It was observed that the bacteria increased most rapidly when the 

 celery is kejit constantly moist, bxit not submerged. * " * That this disease is 

 serious may be judged from the fact that a large grower has lost nearly his whole 

 last crop, the heart of each plant melting awa.y to a worthless mass of rottenness. 

 The same trucker has lost a large per cent of his carrots from bacterial decay, and 

 this suggests the probable connection between the two diseases. 



New Mexico Station, Bulletin No. 4, December, 1891 (pp. 21). 



Horticultural notes, A. E. Blount, M. A. — Tlie soils of the 

 Territory and the methods of irrigation and culture employed in fruit 



