4 DEPARTMENT OF AGRICULTURE BULS. 726-750. 



Department Bulletin No. 730. — Papers on Deciduous Fruit Insects: Page. 



I. The grape curculio 1 



II. The grape root-borer 21 



III. Experiments on the control of the root form of the woolly apple aphis. 29 



Department Bulletin No. 731. — Recent Experimental Work on Poison- 

 ing Cotton-boll Weevils: 



Early attempts at poisoning the weevil 1 



The water-drinking habit of the weevil and its bearing on poisoning 2 



The poisoning tests of 1915 2 



Poisoning experiments in 1916 3 



Experiments in 1917 6 



Laboratory and other experiments 10 



Importance of moisture in poisoning 11 



Relative effectiveness of different arsenicals 11 



Density of the poison 12 



Time of applications 13 



Machinery for applying the poison 14 



Amount of poison per application 14 



Number of applications 14 



Cost of treatment 15 



Necessity for further experimental work 15 



Department Bulletin No. 732. — Smyrna Fig Culture: 



The Smyrna fig industry 1 



Origin of Smyrna fig culture 2 



Introduction of Smyrna figs in the United States 3 



Classification of cultivated figs , 4 



Crops of the fig tree 6 



Ability of the caprifig to carry the winter crop 9 



The fig flowers 10 



Caprifig seeds 15 



Application of caprifigs to Smyrna trees 18 



Caprifig plantations. . . # 21 



The seedling fig orchards at Loomis, Calif 21 



Harvesting and curing 22 



Packing figs 24 



Shipping fresh figs 25 



Smyrna fig culture in the Southern States 26 



Starting a Smyrna fig orchard 28 



Descriptions of varieties 34 



Opportunities in the industry 40 



Bibliography 41 



Department Bulletin No. 733. — Length of Cotton Lint, Crops 1916 and 

 1917: 



Distribution of varieties produced 1 



Damage to crop from weather and insects 2 



Sea Island cotton 3 



Qualities required for spinning 4 



Differences in classification of cotton according to length of staple 4 



Egyptian and Durango cotton 5 



Location of areas of the principal production of extra-length cotton. ...... 6 



Average price received by growers 6 



Yield per acre 6 



Cotton varieties commonly grown 7 



Department Bulletin No. 734. — Nematode Galls as a Factor in the 

 Marketing and Milling of Wheat: 



Introduction 1 



Previous occurrence of the disease 2 



Present distribution 1 2 



Description of the galls and diseased plants 4 



A factor influencing market grade and milling quality 8 



Methods of control and distribution 13 



Summary IB 



