1020] CONTENTS. "^ 



Page. 



New fplnntl diSPnsps, Schoevprs — — ^44 



Production of conidia in (libhcrcUa sauhinetii, Dickson and Johann &4y 



riiilil)l)iiu' downy nnldew of niai/.o, Weston ^5 



Halo blight of oats. Elliott ____ -—- . ^5 



Uiist in siH'd wlieat and its relation to seedling infection, Hungerford ;j4b 



Barberry eradication, Hume and (Jflbert -j-jG 



Tlie barberrv and its relation to stem rust of wheat in Indiana, Pipal ;)4() 



(ihrosiioriinn liuUemuthianuni in the Princess bean, Sprenger n46 



Crucifer diseases. Bos ^"|^ 



The effects of potato leaf roll, AVennink 54b 



Transmission of mosaic disease of Irish potatoes, Scliultz and Folsoin — 546 



Source of the primary held outbreak of potato late bliglit, Eriksson 547 



"Wilt diseases |of potato], van der Lek 547 



Treatment of seed potatoes, George 547 



EtTects of r.ordeaux mixture on potato plants. Bos 547 



Spinach blitrlit and its transmission by insects. Smith 547 



Artificial and insect transmission of sugar cane mosaic, Brandes 547 



[Malizado or mosaic of sugar cane], Earle 548 



Matizado of sugar cane, Stevenson_l 548 



[Sieve tulte disease of sugar cane], van Harreveld 548 



[The causation and prevention of sieve tube disease], van Harreveld 548 



Mosaic of tol)acco, Stevenson 548 



^'(ites on some tomato diseases, Orton and McKinney 548 



Control of apple powdery mildew, Fisher 541) 



powdery nuldew experiments. Waterbury 549 



The vaUie of industrial fungicides in relation with mildew, Sauz^at 549 



Transmissibility of false mildew l)y seed, Laubert 549 



EfHcacy of ordinary and casein Bordeaux mixture, Vermorel and Dantouy_ 550 



Avocado diseases, Stevens 550 



Some disease problems of the season, Stevens 550 



Spraying for citrus diseases : Its usefulness and limitations, Fulton 550 



Report of citrus canker committee, Gillett et al 5.50 



Citrus canker condition, Stirling 550 



Citrus canker eradication, Zuber 550 



Behavior of the citrus canker organism in the soil, Lee 550 



l>ecline of Psnuloiiojian citri in the soil, Fulton 551 



' 'ontrol of root knot by calcium cyanamid, Watson 551 



Scaly bark, a disease of citrus trees, Kime 551 



Coconut bud rot, Stevenson . 551 



Corresi)ondence relating to coconut diseases occurring in Grenada 551 



A stem disease of tea cansefl by Xectrio cinnabarina, Tunstall 552 



Ihists on conifers in Pennsylvania, Adams 552 



White pine blister rust. Brown et al 552 



The white pine blister rust, Cunningham 552 



Experimental production of bacterial tumors on pine, Dufr^noy 552 



liacterial canker of poplar, R^gnier 552 



Brown bast, Fetch 552 



The biology of Polyporus pargamenus, Rhoads 552 



ECOXOM IC ZOOT.OOY ENT05I0I.0GY. 



Field experiments on chemotropic responses of insects, Imms and Husain_ 553 



[Insect control work in Texas] 554 



Insect pests [in the West Indies in 1918] 554 



Experiments on borer control, Stewart 554 



Fruit tree borers and their control, Gillespie 554 



Effects of the freeze of February 2-4, 1917, on citrus pests, Yothers 554 



Work on citrus insect pests [in Porto Rico] 555 



The insects of the evening primroses in New Jersey, Dickerson and Weiss_ 5.50 



Insect and fungus pests of l)asket willows 5.5(5 



Insects attacking farm animals. :\Iaheux 550 



The colonizing reproductive adults of termites, Snyder 550 



Zorai)tera not an aptennis order, Caudell 550 



The paddy bug (Lrptororiffn varicornis F.), Hutson 5.50 



On the biology of Aphis nrena- Fab. in the Southeast, Luginl)ill 5.50 



An infestation of tlie white-pine aphid, Pierson 556 



I 



