STRAWBERRY ROOTWORM ON GREENHOUSE ROSES 
15 
found almost continuously until August, at which time they were 
less numerous, and none have been collected in greenhouses after 
August 31 in any year. 
vations on caged beetles, as indicated in Table 5. 
These records are very similar to obser- 
TABLE 5.—Total number of eggs laid by caged strawberry rootworm beetles, 
Date of deposition 
INST aie 12 
Oe Rn eee Eek ea 17 
ADT Mosca toe Nees 67 
Ga 28 
Que ee ee rk 34 
A Qs ee oa aN oe a 149 
Jia Hern rae ants ee TS 168 
OES Sao ee FE 68 
ily (Se oa ae le 33 
2 Piveaieeeepss Sn a. a aed 21 
7 ME Shane Oe ty a 22 
DAS RET RDS Calas ae 92 
OY oy Bid APS ol a 39 
Rios hed iat eas 35 
VIAN pee ay Lt AES 147 
(oR SB oe ie Na 716 
Bele as i 142 
1p epee MG Bole 153 
SUG as eee) Seo: 112 
17 ee a aE SOL 62 
FN Lan EM 2 ae ole Te fe 76 
PPA aieiet aie pps pele Se 160 
DAS PASE AERC yo de 148 
DA Ge Dutt aie baru er ened 122 
PAS EAM a: tad Bo MENS 221 
G3 RSS LS MES ens 181 
AULT eames ad Ue ase ae 176 
Ee ay pee oe ah, PE 246 
IES LAS MaRS ONO 303 
Co Su 0s beh a PN 178 
DS eee Resin tna 468 
AEROS yaaa 12 
Hy a ee eee ae ia aS 157 
5 eS ah ie a 105 
1922 
Number of— Number of— 
is Date of deposition 
ggs per Eggs per 
Eggs | Adults adult Eggs | Adults adult 
59 Os 20) une Qe Pee Se ee 20 124 
90 19 QO ae rae di aml ae 57 123 
107 - 63 PAS pep ied i REELS os 105 121 
115 . 24 AG He Aisa UY 221 117 
115 - 30 Of pei iuaonesily Cai 27 116 
115 1, 30 PAE aN CEUs a SN 101 109 
111 1. 51 SOEs ait 13 109 
111 SGI Tully. lon wee Aen 434 102 
76 - 43 SEG ee Ore te 251 98 
52 - 40 FSR ih, Palen ah 243 95 
52 - 42 te gas Ns bey ea 352 147 
50 1. 84 AAD eee Stat te ea bays As 206 131 
50 78 AUD ere rans “pat eee 53 127 
50 . 70 11 Looe a I ete) A hg 532 127 
50 2, 94 1 Us Vague cre eka 56 118 
48 1.58 1 Ufo Ye Ae Ra 322 117 
47 3. 02 DD Ore SS ANAL ade 621 114 
46 3. 33 RG ANS Boe see ne cea 636 114 
44 2555 DR ieee raed ADs 561 134 
44 1.41 Oe A he Ree 622 131 
43 TEC aN sees Sb Fea ly UE Ee che Pa heal 378 131 
42 3. 81 Die EP RY ein 176 129 
64 2.31 ee MERON EE 101 128 
66 1. 85 Hea cata 296 128 
65 3. 40 (ieee Ne ER a 583 128 
59 3. 07 tO Spee kes eG 182 127 
54 3. 26 11a Lee tee aioe Bs ar 265 123 
56 4, 39 A: Go ea eee YU A an aa 159 120 
55 5. 51 Uy Aa A Mien aU 125 118 
65 2, 74 7A Wachee Sige N enh S 124 114 
64 7.31 DOES NG Ieee 116 93 
64 FAQ SOD bi 121 ee Loser 34 46 
62 BY (58) 
66 1. 59 Totals keine ses 12,002 | 6,016 
Figure 6 shows the results of observations on 60 caged adults 
made every 2 hours over a period of 80 hours, during which 490 
egos were laid, and is based on data contained in Table 6. Accord- 
ing to these records, the time of day most favored by the female for 
egg deposition is the late afternoon, and next to that the early 
morning hours. 
TABLE 6.—Hgg deposition by adults of the strawberry rootworm; observations 
upon which graph of Figure 6 is based 
Date of oviposition 
1 No data. 
? Observation started. 
Number of eggs laid— 
Dp. m. a.m. m. p.m. 
12 Ze eee Grou |) LOM tae 2a 6 8 | 10 
eh pn (Oe ee ee ee eee EBS (GMC) ee eats Oat Pea) 
he 0; O 1 5 5| 0; O} 18 | 47 7 1 
Ps Wi Onn22ne 4s) 2 One OF Ons 92 eke) 0 
Spe as 4| 0 33 | 9} 0} O} 0/18] 23) 24} O 
