161 



Pfiiiii(ix//i>ru of recent writers, though all wer<- ixniKiis irnluded in Pi'ion'iiporn. If 

 tilt- (listiiK-tion is to be niaintiiiiifil on the l>aHis of the j;frniination of the coiiidia, we 

 nniHt then lall these two fnngi Plamnoiuirnaitittraliu, Spe^j^., ami I'laitmopara nihrnitiii, 

 i>. ami ('. The formation of resting wjxires has not been f)bservefl in either speeies, 

 yet it is evident tliat they have some means of survivinji the winter. 



Jiroini rot of ntofw fniitH (pi». 21.'i-L'Hi). — Obsi-ivations by tin- ;iiitln>r 

 air cited wliicli iiulicate that Mnnilin frit cf iff etia survives the wiiit«T 

 tliioii^li tilt' fnniiatioii of resting- cells or <ieinriia*, ami tliat, "whatever 

 its ori^jiii, any other tonus once eonne«ted with it have been h»st. and 

 it is therefore fairly safe to regard it as an autononioiirj fiinj^us," 



Pitttifo Hcnh fj>i). 2ir»-22()). — T-'xperinients ah»n<;- tlie lines suffj^ested l)y 

 thos(! recorded in the Annual lJe]»ort of tin* stati(ui for 18sy (see F^xperi- 

 nicnt Station Eecord, vol. ii. |». 580) were continued in ISlMh Of \:\ 

 varii'ties of ])otat()es tested in ISIX) Kou;.;h Diamond was the only 

 one which showed no scab, though Kural Xew Yorker and White Seed- 

 ling were comparatively free from it. The plowing iu of winter rye 

 on half of each idat produced no perceptible etfect on the amount of 

 scab. Tin' results fr()m deep I's. shallow planting in 18(M) do not bear 

 out the opinion doubtfully expivssed in I.S81>. that deep planting dimin- 

 ishes scab. The free use of coal ashes iu the drill produced no observ- 

 able efiect on the development of scab. " The thicker-skinned and red- 

 skinned varieties showed no greater resistance t(^> scab than others; our 

 best results in 181M> were from light-skinned and rather delicate fine- 

 grained sorts." The results of investigations into the cause of scab by 

 IT, L. liolh'v (see Af/n'ciiltKrol Srirnre. Se)»tend)er and October. 1800) 

 and by K. Thaxter, as given in Bulletin Xo. 1(>."» of the Connecticut State 

 Station (see Experiment Station Record, vol. ii. p. 4!>0). are briefly dis- 

 cussed. The author finds it difficult to believe that the " deep" and 

 "surface" forms of scab are entirely distinct. 



MiHteUnneouH notes (pp. 220-220). — (1) Dampituj off of cucumbers. — 

 ( )bservations by the author indicated that this aftection is caused by the 

 fungus J'l/f Ilium de hary<inum, Ilesse. which is known to produce the same 

 eftect in Europe, On the assum]>tion that this fungus is always the 

 cause of the trouble, '' plants affected should be at once removed, with the 

 soil immediately surrounding them, and burned. If this is done as soon 

 as the seedling falls, the trouble can be held in check, since the fungus 

 will be ih'stroyed before its reproductive organs have developed." 



(2) Brief notes are also given on the mildew of spinach {Peronospora 

 effits<i), grapevine mildew { I'lttsmojKird riticola) ohsinvi^d on Am j)elopfi is 

 ri-itchii, downy mildew {I'eronospora parasitica) and white rust [Cys- 

 fopus canM'his) on turnips, potato rot {Phytophthora infestaus), elder 

 iiist {.Kcidiiim samhuci), rust of blackberries and ras]>bcrries (Ca'oma 

 iiifrus)^ hollyhock rust [Pucciuia malrarearum), and an undetermined 

 disease of oats. 



Special work in chemical laboratory (pp. 227-312). — This 

 includes the work dime by the station during the year in the inspection 

 of coninier<ial fertilizers, analyses of wood ashes, cotton-hull ashes, 



