- 593 - 
PAVIES, U. M. (2491) 
1925. INVESTIGATIONS OF SPRINGTAILS ATTACKING MANGOLDS. Jour. Min. 
Agr. 32 (4): 350-354, illus. [Abstract in Rev. Appl. Snt. (A) 13: 
423-424. 1925.] 
Of the various remedies tested the best results were obtained 
with a 5 purcunt nicotine sulphate dust equivalent to 2 percent pure 
nicotine. This was effective against Isotom a viridis Bourlet , 
Isotornerus palustris Mull. , and Smynthur us viridi s L. , but Bourletiella 
hortensis Fitch dispersed to where the dust did not rea.ch it. 
'BARE, C. 0. (2492) 
1934. ISOTONURUS PALUSTRIS (MULL.), A SP RINGTAIL INJURIOUS TO CELERY. 
Jour. Econ. Ent. 27: 180. 
A lowering of the water table beneath the beds to cause the soil 
to dry out and a heavy application of nicotine dust gave almost im- 
mediate relief in celery beds in Florida. 
BRITTAIH, T7. H. (2493) 
1924. THE GARDEN SPRINGTAIL ( SMINTHURUS HORTENSIS FITCH) AS A CROP 
PEST. Acadian Ent. Soc. Proc. 1923, Ho. 9, pp. 37-47. [Abstract 
in Rev. Appl. Ent. (A) 12: 496. 1924.] 
In an outbreak of springtails on onions in Massachusetts in 1922, 
nicotine dust (2 or 4 percent) was found to kill all the insects, all 
except the largest being killed almost as soon as the dust touched them. 
DAVIES, U. M. (2494) 
1928. OH THE ECONOMIC STATUS AND BIONOMICS ^W SMINTHURUS VIRIDIS LUBB. 
( C0LLE1 30LQ ) . Bull. Ent. Res. 18 (3): 291-296, illus. [Abstract 
in Rev. Appl. Ent. (A) 16: 230-231. 1928.1 
A dust containing 5 percent nicotine sulphate (Rev. Appl. Ent. 
(A) 13: 424) has afforded control in greenhouse attacks or heavy local 
infestations. 
THOMAS, C. A. (2495) 
1931. MUSHROOM INSECTS. THEIR BIOLOGY AND CONTROL. Pa. Agr. Expt. 
Sta. Bull. 270, 42 pp., illus. [Abstract in Rev. Appl. Ent. (A) 
20: 301-303. 1932.] 
Tobacco fumigants kill a fair number of the mycetophilid flies 
but have little effect on the larvae in the beds. A number of com- 
mercial dusts of which the active ingredient is pyrethrum, or pyre thrum 
and tobacco, have been used under the same conditions, using 2.5 to 
3 oz. of dust to each 1,000 cu. ft. of space. Against larvae on the 
casing soil, various substances, including free nicotine sprays, have 
been used. 
