138 The Philippine Journal 
of Science 
1921 
on each tree in August, 1917, at the beginning of the experi- 
ments, and in August, 1918, when the experiments were com- 
pleted, are shown in Table 5. 
TABLE 5.—Showing degree of canker affection of trees in untreated plat, 
Plat II, of the College of Agriculture citrus planting at Los Banos." 
Leaves affected. 
Species. 
August, 1917. August, 1918. 
Per cent.| Number.| Per cent.| Number. 
CHEPUS. THONG ss ose s Dees eae OO eat See DOs cesceeus 
DR ese es as he ae cer ocean ban aeee aoe OR rccce aa (>) (>) 
BMS San ee es occ ee Lb eubas Glas nbceeeaeceleauTene 0 Uric suscesee 8 
Colpus binenete Ee ee tice Biase. Se 2 ae 
aca ig an, wad ao al kee nia ir cs Le Peat aa tT oa 
By aciid agus oc hence aa Sa eee uke ton asuuaceueeee og en ee pe eee ee 
De eS ne a eaten Dene eee 0 0 LT \ecisstee 
Citra Rit ee. eS ee ee eee sey paca Luaebe BU ig Boas 10 
LD Srnec aS SO ARCA inet Scot NN Reiner CRT are on Sol 5 
OOirué WONG one es a ee coca ve ceok Ttetsaeculan fT loonces nome 
DOs eS eh A esc See | eet eee 6 esc 
Denis Seni lok Se ee eae as ea ea tc gts Griscsueate. Ob | esaikcdiees 
D0 edi pie os se ee ee aaa ca 1 SERN ene a epee 
DOs osace as oe oe ees eae See 2 gt Recneaaye aie a Gs Beinatitiegs ee 
DOsss shee es ds ee p28 Be ome eal Mine pent. See 10 
Crtrus hyetrer o.oo. ea ee re 0 0 0 0 
Citrus aurantifolia... ~~. 2. 5225-2: : :  SReaeees op Serer ees 
Décor ee ee ee eee Se @ fececocaree eee eee 
DO. ps ec ee bt een ae (°) (>) 
DO. oe pee ee en nee Sd er ee 10 | sccccsces 
Citrus medica___- pods Peppers WU teaccee ae 5 
ENO sg Sree rs Sik Shee eke oes te ot ck a ae peso pwodos y ge SS a 4 
D6. 5c ae igiasse decks udeoese 0 Oo) cele 9 
BT Rape tie Seeley ENE OE pn eNO olarak gate Se eee ESN TAG NS PEG es , (a Sie 11 
BM ee ee, Soe er ones Bere et cal ones 15 
Clrus eae ee eee (4 ea ameaptnces 10: |e 
i eet th Coco gas tas snus ia wk ee eua cas 6 loa 100: {wesc ccpees 
Citrus nobilis 0 0 0 0 
Citrus i ae a aR SA Be so ROMA ard 
Citrus hganie ee eee 6 g By pipe Soe a 
Citrus maxime...o5. 52. 1 ee oe pe eee 
Den s25 ns a a ee ; | a SRC meses Tjowdbeevenn 
WG ee eee ia ns a A RS weds BG fscccczoese 
Citreis shettes ae oe ee oes ig eee eae 
Citrus limonia-......- 0 0 |e eines 
Do ft) 0 0 0 
Citrus si is n 6 fe 9 
Do. TBs 5 
®The determination of the species mentioned in this and subsequent tables is taken 
from a chart of the college orchard at Los Bafios made available through the kindness 
of Mr. Mariano G. Medalla, instructor in the College of Agriculture, University of the 
Philippines. The measurement of the amount of canker on the leaves at Los Bafios in 
August, 1918, is also largely to be credited to Mr. Medalla. For this and for much other 
assistance the writer wishes to express his sincere thanks to Mr. Medalla. 
> Dead. 
