- 570 - 
STANILAND, L. N. , and PEAUiuONT, A. (2382) 
1933. NINTH ANNUAL REPORT OP THE DEPARTMENT OF PL^NT PATHOLOGY FOR THE 
YEAR ENDING SEPTEMBER 30 th, 1932. Pamphlet Seale-Hayne Agr. Coll., 
No. 40, 43 pp., illus. [distract in Rev. Appl. Ent. (a) 21: 559-560. 
1933.] 
Plants infested with aphids ( hyzus ornatus Laing) should receive 
two applications of nicotine, either in the form of a spray (6 oz. to 
100 gal. water with soap), or under very favorable weather conditions, 
of a dust. 
WALTON, C. L. (2383) 
1923. THE CONTROL 01 APHIDS ATTACKING SPROUTING POTATOES. Jour. Lin. 
Agr. 30 (9): 829-833 [London], [Abstract in Rev.. Appl. Ent. (A) 12: 
39. 1924.] 
Potato tubers heavily infested with aphids ( My zu s persica e Sulz.) 
were fumigated with p-diclilorobenzene , tetrachlor ethane, and others were 
treated with a dust containing 5 percent nicotine sulphate, equivalent 
to 2 percent pure nicotine. They were then planted and examined about 
3 weeks afterward. The first two lots were markedly backward, while the 
lot treated with nicotine sulphate and the untreated lot were for the 
most part strong and vigorous. It might appear that although nicotine 
sulphate effectively killed the aphids, the crop from the treated tubers 
was no better ''"■nan from the untreated ones. The nicotine sulphate treaty 
raent would prove most effective on potatoes sprouted in boxes, etc., in 
single layers, as they are then freely exposed to the dust and a con- 
sideraole quantity can be dealt with rapidly and effectively. 
SPENCER, H. , ZliviiviERLEY, H. H. , and DAVIS, R. J. (2384) 
1924. DUSTING AND SPRAYING EGGPLANTS. Va. Truck Expt. Sta. Bull. 47, 
pp. 331-347, illus. [Abstract in Rev. Appl. Ent. (A) 13; 32-33. 1925.1 
aphids ('viypus persicae Sulz. and iviacrosdphum solanifolii Ash.) 
were control".;, by dusting with 3 percent nicotine dust while the plants 
were in hotheads. 
HUCKETT, H. C. (2385) 
1925. THE CONTROL GP APHIDS WHICH INEEST CAULIFLOWER SEED BEDS ON LONG 
ISLAND BY ..<'.-• o ojb DQBACCO DbST MIXTURES. Jour. Econ. Ent. 18: 
128-132. [Abstract in lev. Appl. En:, . (a) 13: 246-247. 1923.] 
Nicotine sulphate spray (1:800) is effective against i.yzus 
per sicae Sulz. and macro s iphum solanifolii Ashm. in cauliflower 
seed beds. The use of pure superfine tobacco dust (1 percent mixture) 
ber yields of plants than nicotine sulphate-hydrated lime dust 
(.3 percent nicotine) or nicotine sulphate spray (1:600).. The mixture 
which gave the highest average killing effect was tobacco dust b5 pounds 
and hydrate d lime 15 pounds. This was better than pure tobacco dust. 
