-30- 
the trees receiving three and four sprays ™ere nearer the most heevily 
infested unsprayed trees. Spraying caused a reduction of 55 t o 85 (200) 
percent in the number of infested tips. In 1938 this st-^ ticn/reported - 
thr-t lettable cube ponder containing 3.65 percent of rotenone, used 
r-t the rate of 6 pounds in 100 gallons, with the addition of 3 pounds 
of '-ater-soluble diglycol stearate max as a spreader and sticker, 
applied to Mcintosh and Richard 3-yeer-old trees ^fs the most effective 
treatment. In experiments against the second generation nicotine sul- 
fate 1:800 plus molasf-es 3 percent ^ss the most effective treatment 
and reduced the infestation 48 percent on Golden Delicious. The cube- 
vra.x mixture was good and averaged the best for both series. It was 
concluded th?t spraying alone is n:t a -oractical means of cembrting this 
species. 
Diprthrononyia hypogac^ (Loc r '<), the chrysanthemum gall midge 
Penick and Co. ( 230 ) in 19?3 reported that F^liefurie (<mhich con- 
tains both pyrethrum and derris extracts), diluted 1:400 with rater, 
gave an average mortality of 89 percent after 48 hours. 
wi onarthronelpus buxi Lab., the boxwood leafminer 
Hamilton (131) in 1925 reported tests made in 1922 with Derrisine, 
a commercial preparation of derris. Derrisine diluted 1:5^0 was 
applfed in a mixture of bleckstrar, molasses, 1 part to 4 parts of 
v, atcr.' Both nicotine sulfate and free nicotine gave better control- 
then the Derrisine. 
Turner ( 2^7 ) in 1932 reported that rotenone had. not been effective 
in preventing injury. 
M ycodiplosis alternate F r lt 
Felt and Bromley (86) in 1 Q 39 reported on the life history and 
control of the dogwood, club-gall midge. In 1938 a spray of 4 pounds 
of rosin-residue enulsion and 4 pounds of cube ponder to 100 gallons 
of 'mater was used, the applications being made ] Aey 14, 18, and 28, 
and. June 14, and a badly infested tree in the tree garden showed no 
nt" galls on July 7, end only eight on October 10, indicating material 
reduction -'ith this treatment. 
T hecodiplosis mosellana (Gehin), the wheat mi 
Yuasa ( 328 ) in 1936 reported that sprays containing nicotine 
sulfate or derris mere effective for the control of adults of 
( Si todiplosis ) Thecodiplosis nopollana (Gehin) . 
Muhlo" and Sjoberg ( 208 ) in 1937 reported on the control of th 
wheat -11 midges. No reduction "in infestation was observed '-hen 
plots '-'ere dusted heavily with pyrrthrum oowder or derris, or sprayed 
'-ith a solution of rotenone against ( Clin dairies is ) Thecodiplosis 
mosellana (Gehin) . 
