- 40 - 
noths on catbage plants of which the hearts have already 
closed: 
Spraying with nicotine- or quassia-containing sprays, 
such as nicotine-soap solution or quassia~3oap solution. The 
latter is prepared Toy "boiling 1,5 kg, of qua,ssia chips in 
10 1. of water, allowing to stand for 24 hours after cooling, 
decanting, nixing with a solution of 2,5 kg, of soft soap in 5 
liters of water, and diluting to 100 1. A preparation called 
Tefo-Quassio, is also listed along with some other ready-to-use 
insecticides, 
THEOBALD, F, Y, ■ ' ■ (108.) 
TH3 APHIDES ON MMGOLDS AHD ALLIED PLAIITS. Jour, Bd, 'Agr. 
[London] 19: 914-922, _ 1913, 
A sprny of soft soap and quassia (8 pounds of soap and 5 pounds 
of qucissia per 100 gallons of water) is roivised for comlDating the 
"collier" or tilrjck fly ( Aphi s rumicis ) which attacks mangolds, 
"beans, rjid "boots. 
(109) 
APHIDES ATTACKING VEGETABLES AND M/J?KI;T-GARDEN CROPS. 
Jour, Roy. Hort. Soc, 50: 28-45, 1925, 
Spraying with soft soap and quassia is mentioned as a control 
measure for the green pea aphid ( Macro si phiun pi si K.?lt,) and the 
"black fly or "collier" ( Aphi s rumi c i s ' L,} vihi oh attack peas raid "bcrjis, 
and for aphids attacking potatoes, namely, the green and pink 
potato and rose aphid ( Hacrosiphum solanifolii Ashm.). the allied ". 
green potato aphid ( liyzus pseudosolaai iheo'bald) , the green peach 
aphid ( I/Iyzus persicae Suljier) , and the small potato aphid ( Aphi s 
solanina Passerini) , 
TRAGJffiDH, I. (110) 
BIDRAG TILL KANNEDOMEN OM SPINNXVALSTREN, ( TETRAl^TYCHUS . DUE,) 
I.Ieddel, no, 109 Centralanst, Fors<5ksv, JordbruksomrSdet, 
Stockholm, Ent, Adv, no. 20, 1915. [Abstract in Rev, Appl, Ent, 
(A): 252-254, 1915] 
In experiments conducted against the goose"berry mite 
( Bryo"bia praetiosa Koclil in which lime-sulphur spray 1 to 5 (21 B, ) 
was used, 8,5 percent of the mites survived; when the strength was 
1 to 10, 8 percent survived. The "bushes were, however, too 
thick, which made it difficult to wet all the leaves. In order 
to increase the wetting power of the fluid, Vormorol and 
Danton^-' s' method of addi^ng gelatine was adopted (10-15 g, 
per 100 1, of water), the concentration "being 1 to 20 of 
the sprny, and quassia and nicotine were used for comparison. 
