NOTES AND ABSTEACTS. 



629 



name must be changed to Phoma pomi. Spraying with Bordeaux 

 mixtures twice before the middle of July is suggested as a probably 

 efficient method of control. — F, J. C. 



Apple Leaf Spot and Canker, Inoculation Experiments with 



Associated Fung'i. By G. E. Lewis (PhytopatJiology, ii. pp. 49-62 ; 



April 1912). — The results of the experiments show that Sphaeropsis 

 malorum is the only fungus of several isolated from dead spots 

 on apples that is capable of producing fresh spots on apple foliage. 

 Phyllosticta limitata, Coniothyrium^ pirinum', and Coryneum^ foliicolum 

 were also tried. Sphaeropsis also attacks branches and twigs readily, 

 while Coryneum and Phoma do less damage. Myxosporium and 

 Cytospora failed to attack healthy branches, but may attack weakened 

 ones. — F. J. C. 



Apple Leaf Spot. By C. Brooks and M. De Merritt (Phyto- 

 pathology, ii. pp. 181-190; figs.). — The authors consider that the 

 fungus Sphaeropsis malorum is largely the cause of the leaf spot of 

 apples in New Hampshire, though they appear to think that other 

 fungi may at times be the cause. They isolated and cultivated several 

 strains of the fungus varying in their vigour and infective capacity, 

 the large spored form being the most virulent. Infection comes prin- 

 cipally from canker spots on the shoots, and the young leaves are the 

 first attacked, but infection may take place at any time up to the end 

 of August. The most effective preventive means was found -in the 

 lime-sulphur wash, self-boiled. Lime 9 lb., sulphur 6 lb., and water 

 50 gallons.— F. J. G. 



Apple Moth, The Light Brown. By C. French, junr. {Jour. 

 Dep. Agr., Victoria, x. p. Ill, Feb. 1912). — The occurrence of this 

 insect {Tortrix (Cacoecia) responsana) as a vine-pest is noted. The 

 greenish larvse burrow into the fruit which they destroy. Apples and 

 many garden plants are attacked. Arseniate of lead spray and trapping 

 moths by means of light are both effective. — F. J. C. 



Apple Pest, Remarks upon an Apparently New. By W. E. 



CoUinge {Jour. Econ. Biol. vii. pp. 64, 65; June 1912). — The plant 

 bug Lygus pratensis was found to oviposit in the young fruits of 

 apple, causing the ultimate formation of dimples and discoloration 

 somewhat like that due to scab. Two or three only occur on each of 

 the attacked fruits. — F. J. C. 



Apple Red-Bugs, The. By 0. E. Crosby {U.S.A. Exp. Stn., 

 Cornell, Bull. 291; Jan. 1911; 22 figs.).— This bulletin treats of two 

 new apple ^ests {Heterocordylus malinus Eeut. and Lygidea mendax 

 Eeut.) They are sucking insects of a bright red colour, and the fruit, 

 when injured by them, is unmarketable. Both species pass through 

 five immature stages and attain wings at the fifth moult. 



Contact spraying with black-leaf tobacco extract has been found 

 the most satisfactory method of control. — V. G.J. 



