6 } a 
will show up for awhile, from infection of spores you could not 
see, and must be similarly treated. a 
BUGS AN D 5 “Ruy ed 28 oie Se 



I do not advise the use of any spray for insects which does not — 
contain, along with rotenone, pyrethrum, ete., some compound of 
ethylene dichloride or a similar heavy pervasive gas. Only such — 
a spray will penetrate tight buds and destroy thrips, rose midge, — 
etc. WHICH CANNOT BE REACHED by ordinary sprays. At the present 
time I know of only two sprays containing othylene dichloride in 
such concentration as to be as effective as possible against ins q 
sects inside tight buds. These sprays are Rototox, made by the | 
Rototox Co. of E. Williston, N..¥. and Rotenol, made by the Mil= 7 
ler products Co. of Portland, Ore. | ee 
Phere are some excellent sprays on the market which have a small 
concentration of a ded Morhtlie inzredient; but they are designed. | 
as, or to be used with, a fungicide also. Because chentes an 
ance of a spray containing so “nan varied 4 ingredients is a touchy — 
provosition these combination svrays are not so effective seaineten 
INSECTS as the two insecticides named above. The rose grower 
will have to decide in his own indi 
portant to him--control of insects cs ally, combination con- 
‘trol, fungus control, ete, If you ies nie the sprays named 
above with sulphur for fungus, hose o the bushes between ‘your — 
alternating applications and avoid chemical complications. 
THOR SRA G 
During hot weather most of your rose buds may be ruined by the ~ 
thrips unless you control them effectively. Many of the buds may = 
not open at all and those that do are likely to be small and ugly 
with mengled brown petal edgese Thrips nymphs work INSIDE the \ © 
buds before they open, sucking and rasping the petal oteara The. = 
gas sprays are imperative for effective thrips control. a 
ADTAYS WATER THE BUSHES well the day before spraying, (this ap- 
plies to any spray) so the thirsty leaves will not absorb pois- 
ons from spray compound used. Spray for thrips early in the 
morning before they are flying actively in the heat and you are 
able to hit the adults with the spray. Start over your rose | 
