24 INDEX. 



Page. 



Roses, food plants of Euthrips tritici 12 



Rub us sp. (See Dewberry.) 



Rye. food plant of tobacco thrips 16 



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



Sorghum halepense, food plant of tobacco thrips 8 



Splitworm. (See Phthorimcea operculella.) 



Spray, for tobacco thrips. no injurious effect on product 22 



Spraying, for tobacco thrips, cost 20-21 



Strawberry, food plant of Euthrips tritici 12 



Suckfly. (See Dicyphus minimus.) 



Temperatures, in slat and cheesecloth shade tobacco fields, difference 16-17 



Thrips taoaci (onion thrips) mistaken for tobacco thrips 12-13 



on tobacco in Russia 5 



tobacco. (See also Euthrips nicotianw.) 



cultural methods for control 14-17 



distribution 7-8 



feeding habits '___ 10-11 



flight 11 



food plants 1„ 7, 11. 16 



fungus on dead specimens 14 



hibernation 12 



history as pest 5-6 



injury, nature and extent *. 1 6-7 



insect enemy . 14 



insecticides used in experimentation . 17-18 



jumping Jt 11 



life history 11-12 



methods for study 11-12 



remedies 14-21 



species mistaken for it 12-13 



spraying, cost j 20-21 



wheat. (See Euthrips tritici.) 



Tobacco decoction, against tobacco thrips 18 



insect enemies, in South 



not a food plant of Thrips taoaci in our country 5 



presence of Anthothrips niger L3 



thrips. (See Thrips. tobacco, and Euthrips nicotianw.) 



Tomato, presence of Anthothrips niger 13 



Triphleps insidiosus, enemy of tobacco thrips 14 



Whale-oil soap, against tobacco thrips 18 



Wheat, food plant of JEolothrips bicolor and Anthothrips niger 13 



tobacco thrips 11, 16 



thrips. (See Euthrips tritici.) 



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



Xunthium glaoratum. {Sec Cocklebur. i 



o 



