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thia peat in Denmark than apraying with a derri8 suspension.— Bovien 
and Stapel (78) • 
Derri8 spraya were effective .--Ananymou a (1). 
Hoplocaropa testudinea (Klug.), the European apple fruit aawfly 
In England if lead araenate or derri8 ia included in the epray 
to control thia peat it must be applied not later than 8 daya after 
four-fifths of the petals have fallen. On varieties eusceptible to 
sulfur injury, a carefully timed spray of derris extract in white oil 
should be applied at petal-fall. Trees on which appreciable numbers 
of red mites are present 10 days later should receive a fourth spray 
of lime-sulfur and a wetter, 1 percent of white oil or, preferably, 
derris in white oil,— Hey (285). 
Laboratory testa with derri8 (4 percent of rotenone), at 4 pounds 
per 100 gallons of water, against the young larvae were very promising 
as most of the larvae died on coming in contact with the sprayed apples 
without attempting to enter the fruit*-— Py ens on (480) • 
(Monophadnoides ) Blennooampa rubi (Harr#), a raspberry aawfly 
If infe8tations of the larvae appear early in the season on leaves 
of strawberry, a spray of 3 pounds of lead arsenate in 100 gallons of 
water 8hould be applied. Pyrethrum or derris spraya should be applied 
again8t those that develop after the fruit is set*— Slate and coworkera 
(544 , p. 51). 
Nematus sp. 
Since neither pyrethrum nor derris scorches the ahoota of oonifera 
in May in Germany, these can be used to control sawflie8.— Gabler (208 ) . 
Priophorus rubivorus Rohw., a raspberry sawfly 
Three applications of derris, cube, or timbo root, either as dust 
or spray, are recommended.— Hanson and Webster (260 , p. 10). 
Pristiphora abletinus (Christ), the lesser spruce sawfly 
In Germany a proprietary dust of pyrethrum and derris pave good 
results in the laboratory, but it was unsatisfactory in the field owing 
