ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 81 



Fusarium lunate, septate spores. The older pustules become dark blue 

 at the base, forming a hard dry sclerotium ; the upper part turns 

 bright blue, and two different types of spores appear — the first the 

 typical Fusarium spores, the second round and pointed spores. No 

 asctis fruit was observed, but the pustules may be regarded as a reduced 

 pycnidial stage. Sterilisation by heat is not possible, as the fungus can 

 resist temperatures that kill the tubers. 



Fritz Krause* records a disease of oats in West Prussia due to 

 ScoUcotrichum graminis. It appeared at first as whitish spots on the 

 leaves, which presently increased in size and became brown ; on the 

 white spots, black points appeared, the fructification of the fungus. 



E. J. Butler f recognises Coryneum Mori as a disease of mulberry 

 in Kashmir, introduced from Japan. The fungus attacks the base of 

 the twigs, and does serious damage to the trees ; it develops with great 

 luxuriance on the fallen branches. Several other fungi are given as 

 parasites of the mulberry. 



In his yearly report of fungi, G. P. Clinton % takes note of several 

 parasitic fungi. Phytophthora Thalictri was found in Connecticut on 

 Thalktrum Polygonum, also the oospores, a new discovery. Smith and 

 Smorenski had announced the finding of the oospores of Phytophthora 

 infestans, but Clinton sees reason to 'doubt the correctness of this, as 

 culture experiments with the oospores were a failure. The oospores of 

 P. Phaseoli were easily grown, and their development is described in 

 detail. 



D. Kirchner § states that the oak mildew is universally prevalent in 

 Wurtemberg ; it made its first appearance in May, and was at its worst 

 in July and August. The mischief caused is not so great as in France. 

 It has again been demonstrated that the mildew in question is not 

 Phyllactinia corylea. Some perithecia of that species found on the oak 

 were accidental. 



H. Klebahn|| has published in volume form the results of ex- 

 tended observations of fungus diseases on lilac (Syringa vulgaris). This 

 shrub has been extensively cultivated of late years, and, with overcrowd- 

 ing, have arrived the fungus pests. He touches on the animal and 

 bacteria pests, and then passes to parasitic fungi. Among these, there 

 are three of special importance : Botrytis cinerea and Heterosporium 

 Syringse, which attack and destroy the leaves, and Phytophthora Syringse 

 sp. n., which causes a disease of the bark and of the buds. Klebahn 

 describes in detail the appearance of the fungus, and the havoc it works 

 in the tissues. He made a series of artificial cultures, and produced 

 abundant oogonia and oospores. Finally by transferring to pure water 

 culture a piece of the mycelium, he was able to develop sporangia and 

 to watch the zoospores escape. He infected successfully twigs of the 



* Centralbl. Bakt., xxv. (1909) pp. 102-6 (1 pi.). 



t Mem. Dep. Agric. India, Bot., ser. 2, viii. (1909) 18 pp. (4 pis. and 1 fig.). 

 See also Ann. Mycol. vii. (1909) p. 495. 



X Rep. Conn. Agric. Exper. Stat., xii. (1909) pp. 849-907 (16 pis.). See also Ann. 

 Mycol., vii. (1909) p. 495. 



§ Nat. Zeitschr. Landw. Forstw., vii. (1909) pp. 213-17. See also Ann. Mycol., 

 vii. (1909) p. 497. 



|| Krankheiten des Flieders. Berlin : Gebr. Borntraeger (1909) 75 pp. (45 figs.) 



Feb. 16th, 1910 G 



