THE ‘CALIFORNIA PEACH BORER. 
73 
TaseE III.—Records of larve of the California peach borer taken from trees, 1908-9— 
Continued. 
ae ara i =e 
Num- | Num-) 
Number ber of | berof | Total | Number 
Date of trees Kind of | larvee | larve | number | Number, empty 
ere exam- tree. small | half to | of of pupe. pupal 
ined. to half) full larve. | eases. 
steven grown. | 
= =a Aa pape 3 SH 
1909. | 
Feb. 5 eg ASDELCOU ss ocllee cleo bof See ame 2 19 0 0 
Mar. 4 an Sedo. : NeSe ye aoe 87 0 0 
IVICA ON Eee ersce at eateans ees ee ee ticlinpa sects eee bell Las Sel sees 
| 
20 9. || Peach... -| 0 9 | 9 ih Ree ete 
21 1 | Apricot. -- 0 12 12 0 0 
June 4/ Several | Peach..... 0 | 20 20 | 0 
6 2| Apricot. ~ - 0 33 33 yy) 0 
9 12 | Peach... o; 20] 20 5 | 2 
| 
10 One doves Sel cose Pedtes | 34 13 | 2 
| 
24 | 7a\pBruness- 3 | 0 | 20 20 26 0 
26 On Psd Ges | 0 60 60 3 1 
26 One ad OSS. =.= 7 47 54 0 1 
26 Sele On eee 0 76 76 53 | Several 
| | 
26 21) “Aipricot._ - 0 87 87 48 36 
| 
| 
| | 
| | 
| 
28 LON Oe ee liar pate 45 45 51 0 
July 7 Hyleendoey eae ‘Several 20 20 30 16 
74 eee ae Sse atee FA 14 14 ol lx ate 
| 
Remarks. 
Larvee of all sizes. 
Do. 
Larvee in cocoon; sec- 
ond for the season. 
Old peach trees only 
slightly attacked; all 
larve in cocoon; 
third for season. 
| All larvee nearly full 
grown. 
| Still active larva in 
just finished cocoon. 
| All pupze and empty 
pupal cases in nearly 
dead trees. 
| Larvee all nearly full 
grown; 10 pupz and 
2 empty cases from 
a nearly dead tree. 
Prune trees on almond 
or Myrobalan plum- 
root stocks, and 
mostly in good con- 
dition. 
Do. 
Larvee nearly all full 
grown; 40 pupe, 13 
larve in cocoon, 
empty pupal cases 
in nearly dead trees. 
Trees about 8 years 
old, completely gir- 
dled; most larve in 
crown from surface 
of ground to 14 to 16 
inches above; 34 
pupe, 19 larve in 
cocoons. 
The very few larve 
taken were appar- 
ently of the new 
brood. 
Four larve removed 
from trees began to 
spin their cocoons 
July 30, 1909. 
The worming records, so far as they are related to the larval stages, 
may be summed up as follows: 
Newly hatched and very small larvee were found from early in June 
to October and November. 
time during the year. 
Half-grown larvee can be found at any 
Larve which are fully grown during the 
summer usually transform to moths during late summer or fall, 
while larvee which are full grown during the fall and winter transform 
to moths early during the following spring. Larve more than half 
grown to full grown are most numerous during the winter and spring. 
Larve are apparently active throughout the winter and are never 
entirely dormant. ; 
