750 EXPERIMENT STATION RECORD. [Vol.40 



practically assuring a good, clean crop of fruit and leaving the foliage and trees 

 in good condition. 



How to combat fungus diseases, F. de Castella (Fruit World Austral, 19 

 (1918), No. 9, p. 213). — This note gives the substance of an address by the 

 author to the fruit growers at Ardmona, August. 191S, dealing with grape 

 downy mildew, gray rot, and black rot, and with the employment of the pre- 

 ventive sprays Bordeaux and Burgundy mixture and admixtures to increase 

 their adhesiveness. 



Calcium carbid for grape Oi'dium and downy mildew, J. B. Latmond (Prop. 

 Agr. et Vit. (Ed. FEst-Centre), 88 {1917), No. 87. pp. 269. 870).— The author re- 

 ports the employment in connection with severe Oidium and downy mildew 

 attack of calcium carbid, applied abundantly in the form of a One powder to 

 the surfaces and followed by a very fine spray of water. The ((Toots of the 

 acetylene gas were very striking as regards control of the diseases on both 

 foliage and fruit 



Rational protection for grapevines against downy mildew, O. ArnERERT 

 (Prog. Agr. et Vit. {Ed. VEst-Centre), 89 {1918), No. 19. pp. 445-449).— Observa- 

 tions are said to confirm the view that spraying should conform to age and 

 consequent growth of vines in order to avoid the exposure of areas to infection 

 by continued growth and hy removal of the fungicide due to precipitation, 

 Suggested sprayings to the number of six are tabulated to ag - regards 



the first four, in case of black rot and of severe or moderate mildew Infection, 

 with the appearance of certain numbers of leaves, the last of these being em- 

 ployed about August 20. 



Positive control of grape downy mildew, A. <"■ {Prog. Agr. et Vit. 



(Ed. VEtt-Centre), 88 < /.''/?>. No. 85, pp. >.)— An example is given show- 



ing the absolute control of grape downy mildew obtained by the employment 

 before, during, and after rain of Bordeaux mixture at a 'J..' per cent copper 

 strength with an equal proportion of lime. 



Grape downy mildew control during 1918. A. Cadqbet {Prog. Agr. et Vit. 

 (Ed. I'Est-Centn I, 89 {1918), Vo. 17, pp. 892, 898).- Attempts at combating 

 grape downy mildew are s:iid to have boon absolutely effective with certain 

 hybrids when employing the blue basic copper spray, particularly during or 

 after a very misty or rainy period. Both copper sulphate and lime should be 

 present in a Btrengtb nol less than .°. per cent, and the vinos should present a 

 distinct blue color from June 10 to July 15. This mixture is supposed to owe 

 its efficiency not only to the copper compound but also to the lime and to the 



adherence of the ri^iTw copper. 



Precipitation and grape downy mildew in 1917, L, CHAPTAL (Prog. Agr. rt 

 Tit. {Ed. FEst-Centre), 88 {1917), No. 48, /-/>■ 116-483).— Data presented with 

 discussion are considered to show n distinct relation between precipitation and 

 other factors (particularly in 1902 and 1917) and the prevalence of grape 

 downy mildew. 



Eelworm disease (blackhead) of bananas, W. NOWKLE < igr. Xnrs [Bar- 

 bados], 17 {1918), No. &2, p. 206).— The author notes briefly information col- 

 lected regarding a serious condition affecting the coarse banana known in 

 Grenada as bluggoe and ascribed to a nematode, possibly Tylenchut similis, 

 concerning which further information is being sought The trouble may appear 

 in plants of any age as q drying of the outer leaves and later of the fruit hunch, 

 the development of which is quickly arrested. Bulbs and roots of young suckers 

 from diseased parent plants may .any the infection. The nematode appears to 

 be widely distributed, attacking even vigorous plants. 



Bud rot disease of coconuts, S. P. Ashby (Jowr. Jamaica \gr. Boa 

 (1918), No. 8, pp. 831-838).— Coconut bud rot, previously referred to (B. S R , 



