24 INDEX. 



Paere. 



Roses, food plants of Buthriijn tritici 12 



Rub IIS sp. {See Dewberry.) 



Rye, food plant of tobacoo tbrips l(j 



Shepherd's purse, food plant of tobacco thrips 7. 11 



Sorghum halepeiisc, food plant of tobacco thrips 8 



Splitworm. (See Phthoiinuva opercidella.) 



Spray, for tobacco thrips, no injurious effect on product 21 



Spraying, for tobacco thrips, cost 2(»-21 



Strawberry, food plant of Eiitlnips tritici 12 



Suckfly. (See Dicyplins iiiiiniinis.} 



Temperatures, in slat and cheesecloth shade tobacco fields, difference 10-17 



'lliripH tiibuci (onion tlirips) mistaken for tobacco thri])s 12-1."! 



uu tobacco in Russia 5 



tobacco. (See also Euthrip'< uivotiana'.) 



cultural methods for control 1-i— 17 



distribution 7-8 



feeding habits 10-11 



flight 11 



food plants 7. 11. Iti 



fungus on dead specimens 14 



hibernation 12 



history as pest - - - •")-<; 



injury, nature and extent G-7 



insect enemy J ^ 14 



insecticides used in experimentation 17-18 



jiunping 11 



life history 11-12 



methods for study 11-12 



remedies 14-21 



species mistaken for it 12-18 



spraying, cost 20-21 



wheat. (See Euthrips tritici.) 



Tobacco decoction, against tobacco thrips 18 



insect enemies, in South t; 



not a food plant of Thripn tubacl in our country 5 



presence of -Aiithotlirips nigcr 13 



thrips. {kiee Thrips, tobacco, and Euthrips nicotiaine.) 



Tomato, presence of AuthotJirips iriger 13 



Tripltlepv iiisidiusvs, enemy of tobacco thrips 14 



Whale-oil soap, against tobacco thrips 18 



Wheat, food plant of J^olothrips bicolor and Anthothrips nigcr 13 



tobacco thrips " 11, 1(! 



thrips. (See Euthrips tritici.) 



" White vein," injury occasioned by tobacco thrips 0-7 



XantJiiuni ghtbratuni. (.S'cc Cocklebur. ) 



o 



