ALFALFA SEED PRODUCTION. 11 
TABLE II.—Pods and seeds produced by alfalfa flowers on the same plants, free and pro- 
tected from vnsects—Continued. 
B.—INSIDE NETTING: FLOWERS NOT TRIPPED EITHER ARTIFICIALLY OR BY INSECTS. 


Total Total Mlowore Average 
Year Place Number ! number | Number | number bearing | 2Umber 
r i of plants. of of pods. of ods 8 | of seeds 
flowers. seeds. | PO°S: | per pod. 
bf fp fe, 
Per cent 
MOQ Se Se I es ULLMAN a ieletctatas </ee 7 651 25 9 3. 84 1.16 
CHICO Ean re aes 15 4,116 157 230 3. 81 1. 46 
Arlington........... 1 PAT Ley ae Able Pea Gea | We Ma ee AT 
TST OTS A ete eee a Pullman........-... 15 1,500 131 357 8. 73 2.72 
: Chinook. 2 02205522. 10 1,186 138 282 11. 63 2.04 
HT AVTO Sse Gee Meise 9 535 BO pee tsaee te OOO eee mace 
Chico sos tae 8 | 832 DS NCS Ac oe ies TE80) eee 
TUONO es i ies eae aie ers ee Bullman) ss ss 6 314 12 22 3. 82 1. 83 
OD PS eves pc nee New London........ 6 169 il 11 6. 50 1.00 
Mo tales erse aye a ai oes cSt aa ol 77 9, 340 519 QB teers opeaeet rs Cpacte eee oe 
PANV CT AS Ce pepe yral vera tey Arce ae SNM pay NTS ets A Ha DU rR Ne is aN iene 5.55 1.78 
C.—INSIDE NETTING: FLOWERS ARTIFICIALLY TRIPPED. 
LOOSE ee See See palltmanssioisele cls «cio ¢ 7 576 148 205 25. 67 1.38 
CHICO ae asus 54 15 4, 229 1, 086 1,908 25. 67 1.75 
Arlington........... 1 22 7 9 31. 81 1.30 
GOO eee SO Pullman ess Oey. 15 1,379 599 1, 783 43. 43 2.97 
Chinook............. 10 830 370 681 44, 57 1. 84 
(PRAT else saatette hs 9 337 LOS Pec aes: 30./86)|Posee nee 
Chicoee yet oun: 8 1, 250 BAD aie: 27.60) 2 eee 
TOVO Ge eos oese Soe | Pullman? 3252.6 2: 6 296 75 103 25. 33 1.37 
LOUD S Nae se Ria New London........ 6 155 50 91 32. 25 1.80 
MNOS ee tae Ss 2 ea oe ate 77 9,074 2, 784 ANI SON sce contac ale Se reas 
~ In Table II there are no data to indicate what percentage of flowers 
actually tripped by insects or other natural agencies form pods. 
Data on this point were secured by observations at Pullman, Wash., 
in 1908. Flowers which had’been tripped naturally were marked by 
putting a drop of insoluble drawing ink on the calyx of each. The 
racemes were then inclosed in netting to prevent other insect visits. 
The results are shown in Table III. 
TasBLE II1.—Pods and seeds produced from alfalfa flowers tripped under natural conditions. 

Number of pods | Total number of 
Number of flowers. developed from— | seeds developed. 
R 2 From 
aceme. Not Toets Sia flowers 
In ra- | tripped | Tripped me ane not 
ceme. | /TPped-| when in-| flowers. ED an tripped tripped 
closed. Pi OM CES =) lnwnen ine 
closed. closed 
NOMS RG Eee eels cre Linvemcnoie s 11 4 u PAN (ies ASSP e Pas PAS aR 
INOS eA ca OBS EOS Ue De eee ll 8 3 Shelia aialekes yas ee ane Fe 
INK BG ouesoo SA OnE Ce eee een 16 11 sy) CE ae Sea SOAS meas 
SNC ties Li 2 Ma eS a aa 8 6 2 Sheeler ies Dili eee eee 
INR OR ete ein oe sie ce sincre dle 17 11 6 7 1 11 A 
WOO osse4s SSE Sees 10 5) 5 Si Oy De seston 
IN GENE PE EE es Aa eae ate 18 10 8 PATA eID) st Dil he eee ui 
INOHOME Pee eee sec ae geil De. 9 SH eae ag aes Sree eine BON oy oi UR 
NON OMS eee Nien Me no) oc a il 6 5 Ba ie ae 1 Suse 
IN@= ND)2's Sab SSS Ce ee 13 8 5 er RS rau a (ae ad A 
os TL ee ee 15 8 7 Gilead D5 eis eae 
INOS os oo Ube EUR aseerg ese seE 11 7 A erie tcteteieraie| Din ie iss stents 2 

