| 
beetles 
si f i : 
[Five beetles were used in each experiment] 
STRAWBERRY ROOTWORM ON GREENHOUSE ROSES 
ol 
| Tapre 13.—Experiments with arsenical dusts on caged strawberry rootworm 
First day | Second day | Third day | Fourth day | Fifth day 
Material and strength Feed- Feed- Feed- Feed- Feed- 
a \) aia : ing Sill wakes ing : ing 
Dead punc- Dead punc- Dead pune- Dead | punc- Dead pune- 
| tures | tures tures tures tures 
Sula eee 90 parts__ | i | 
Arsenate of lead_-__-.---- 10 parts_- \ ly 10 3 8 0 3 1 0 |------|------- 
BuO MUne ee Se eS 90 parts__ ! 
Arsenate of lead_---_----- 10 parts __ \ 0} 4 | 0 1 1 5 0 3 t 0 
SIDI O) 0 6 ol ee eee ee 90 parts_- | 
musenate ollead 22 2---* 10 parts_- k 0, 9 0 9 0 0 0 0 1 0 
SUT C VG See Bs BE 80 parts__})\ | | 
Arsenate of lead.-_.-_.-.-20 parts__|f OF 2 t 2 1 0} 2 2 0 
Brennan ees Wyk eee le 80 parts__|\ ~~ 1 | 
Arsenate of lead____.-___- DO Mariscal ewes Nimclna Ses aleaKTe eo NERD Visi eiesae ac caida simi lint pale a 
‘Sie Ulj OL aya We a aS eee a ea 80 parts__ | 
Arsenate Of leadi2s 22 25-8 20 parts_- \ 0 0 t : 0 3 0 0 3 1 
SUN Da eS a ae 80 parts__ | 
Arsenate of lead___-_-___- 10 parts_- 0 | 11 3 CO ngs a MENUS STC it aL eal MDI A 
Bondeax, drys. --2--2_* 10 parts_- 
~SIPONT Mae a ane 50 parts__ | 
Arsenate of lead_____-___- 10 parts__ 0 0 | 0) 6 2 3 Ooms: “0 3 1 
LCE ay RE ee Ue 40 parts__ | 
—SUdI OU TT Mea a eee 80 parts__ | 
Arsenate of lead._____.-_- 15) parts — 0 1 0 3 0 0 0 0 0 0 
Powdered sugar___________ 5 parts__ 
paccnate of lead, QUE so eee eae 3 4 | 2 Dota alee ae NPL el | ALGAE al Noe er ah | een 
“SUL OV aN ae aN A 90 parts__ 
Calcium arsenate________- 10 parts__ \ : 3 3 0 1 0 |------)-------|------]------- 
— SUT oa Wo pm se 90 parts_- 
eum ausematenss= us 10 parts__ \ 0 1 0 6 0 5 0 0 4 3 
BTU os ei al Ma ee he 80 parts__ | 
eam ArSCnate=ss see ee s 20 parts_- \ 0 2 t : 2 0 : 0 1 0 
PSURs pet Wy 3) 80 parts_- 
Calcium arsenate________- 20 parts__ \ 0 c 0 0 3 2) 0 0 2 1 
Calcium arsenate_____-_- 2 pounds__ : 
UY Quel dots la a 50 gallons__ \ 1 3 3 |. 3 0 0 1 0 |------|------- 
Sloan 28 wee Bee ReaD 50 parts_- 
Calcium arsenate________- 10 parts_- 0 1 0 2 1 1 0 0 2 1 
PENG OLIN pee apis Sa 40 parts .- 
“STN a ee a ae aes eal 72 parts__ 
Arsenate of lead_________- 18 parts__ 0 3 0 3 0 5 0 0) 0 0) 
BOOMNShArCh= 2 222 sue ek 10 parts__ 
“SHUT eS aa ee ll pat a 81 parts__ 
Arsenate Of lead. 2-22. 22e 9 parts__ 0 3 i) 3 0 2 0 CG Jl a RI es Sh at 
POMS ARC Mis i ea 10 parts_-_) 
HOM WOO GIy ie Lie ew ee 0 24 0 20 0 6 0 7 0 
SSMU OUTC se Ok Neo eel 0 18 0 13 0 8 it 4) @) (1) 
Wheck (untreated leaf) 2.2... -22__. 0 52 0 36 0 26 0 WE Ah ©) (1) 
(0). by Se el a UG a an Nea a Ge 0 0 0 65 0 50 0 0 0 91 
CO, Sa a AI GUESS EES eee 0 0 0 0 0 25 i 19 0 0 
Check (no food, 14 beetles)________. (Oe ai ey OU Ee aae (OM SS e CO) age emacs Ones eee 
1 No data. 
— = = 
