- 578 -- 
contain at least 5 percent Black Leaf 40 for the control of the singles 
nymphs an( ^ that from 60 to 75 percent of sublimed sulphur "be added to 
combat mildew. 
4. Heteroptera, 1921-1933 
HAT SOU, J. R. (2422) 
1925. THE CHINCH BUG ON ST. AUGUSTINE GRASS LA17NS. Pla. Agr. Expt. Si 
Press Bull. 371, 2 pp. [Abstract in Rev. Appl. Ent. (A) 15: 588. 192| 
Besides using calcium cyanide against chinch bugs ( Blissus 
leucopterus Say) the following are recommended. A mixture of 93 lb. 
hydrated lime and 7 l/2 lb. nicotine sulphate, which should be applied 
thickly enough to give the grass a whitish appearance; a dust containin, 
finely ground tobacco dust with an equal weight of hydrated lime; and a 
solution of 1 pt . nicotine sulphate in 100 gal. water. The spread of tl| 
solution may be increased by the addition of 5 to 6 lb. soap or 1 lb. 
casein-lime. 
ANONYMOUS (2423) 
1924. INSECT PESTS IN 1923-1924. Pa. Agr. Expt. Sta. Bull. 188, pp. 1( 
17. [Abstract in Rev. Appl. Ent. (A) 12: 545- 1924.] 
Against the apple redbug (Heterocordylus malinus) nicotine dust 
proved as satisfactory for use on the petals as nicotine spray. Two 
percent nicotine sulphate with dolomite or hydrated lime as a carrier 
was used with success. 
PARROTT, P. J. (2424) 
1921. CONTROL OF SUCKING INSECTS T7ITH DUST MIXTURES. Jour. Econ. Ent. 
14: 206-214. [Abstract in Rev. Appl. Ent. (A) 9: 352-353. 1921.] 
A dust containing 0.5 percent nicotine produced almost instant 
paralysis of Lygidea mendax Reut. (apple redbug) and was as quick in 
action as a preparation containing 1.0 percent. The apple and grape 
leafhoppers Empoasca unicolor Gill, and Empoa ro s ae L. also proved very 
susceptible to the same dust. Mixtures containing 0.5 percent and 2.0 
percent nicotine proved effective against Myzus rib is L. (currant aphid)! 
and a. 2 percent nicotine mixture paralyzed the nymphs of the bug 
Poecilocapsus lines. tus P. 
ANONYMOUS (2425) 
1929. INSECTS OF THE SEASON 1928 IN CANADA. Ontario Ent. Soc. Ann. Rept 
59 (1928): 7-38. [Abstract in Rev. Appl. Ent. (A) 18; 117-118. 1930.] 
Heavy dusting with 4 percent nicotine put an end to an infestation 
of the green apple bug ( Lygus communis Knight) . 
