NOTES AND ABSTRACTS. 



479 



Lime-Sulphur Wash for Use against American Gooseberry 



Mildew. By E. S. Salmon (Jour. Bd. Agr. vol. xix. No. 2, pp. 99- 

 106). — The results are given of a number of experiments conducted at 

 Wye College during the summer of 191 1 with the object of ascertaining 

 at what strength (specific gravity) the lime-sulphur wash can be used 

 on the foliage of the gooseberry from May to September without 

 causing injury. — A. S. 



Lime-Sulphur Wash for Use against American Gooseberry 

 Mildew. By E. S. Salmon and C. W. B. Wright (Jour. Bd. Agr. 

 vol. xix. No. 12, pp. 994-1004). — Experiments were carried out during 

 1912 on a number of fruit-farms in the Swanley district in order to 

 supplement the information gained as the result of experiments 

 conducted at W 7 ye during 191 1, and described in the Jour. Bd. Agr. 

 vol. xix., No. 2. In all, 1015 bushes of nine different varieties of 

 gooseberries were sprayed. 



" Different varieties of gooseberries differ to a marked degree as 

 regards the susceptibility of the foliage to injury from the wash. It 

 is possible with some varieties, e.g. ' May Duke,' to spray repeatedly 

 throughout the season with lime-sulphur, at a strength (roi sp. gr.) 

 sufficient to prevent the attacks of the American Gooseberry Mildew, 

 without causing any injury to the foliage," whereas, in the case of 

 some other varieties, e.g. ' Valentine's Seedling ' and ' Yellow Rough,' 

 the susceptibility to injury is so marked that they cannot safely be 

 sprayed with lime-sulphur at all. 



It seems probable that some varieties will prove resistant to injury 

 early in the season (May), though susceptible later. 



It is concluded that " under ordinary summer weather conditions 

 the ' strength ' of the lime-sulphur wash should be as follows : — 



"For ' Whinham's Industry,' 'Rifleman,' 'Warrington,' and 

 ' May Duke,' 1/01 sp. gr. 



" For * Lancashire Lad,' 1*005 S P- g r - 



"For 'Crown Bob,' 1*005 S P- g r - early in the season; later in 

 the season some injury may be caused. 



" For ' Berry's Early,' 1*005 S P- g r - early in the season, when the 

 bushes are more or less shaded ; later in the season injury is caused 

 by the wash at this, and at lower, concentrations." — A. S. 



Linnaea borealis. By Emil Giger (Beth. Bot. Cent. Bd. 30, 

 Abt. 2, Heft 1, pp. 1-78; 11 tables, 3 figs.). — The author gives a 

 thorough " monographic study" of this interesting plant, with a map 

 showing the distribution. The chief points considered are as follows : 

 Nomenclature and systematic (including Wittrock's varieties) ; mor- 

 phology of vegetative organs ; anatomy of stem, root, and leaf ; de- 

 velopment of flower ; abnormal flowers ; development of anthers, 

 pollen, carpels, ovules, and embryo ; pollination and fertilization 

 (including a list of insect visitors) ; germination and seedling. Lists 

 are also given of the various Conifers in Europe, Asia, and America, 



