Sie Oe 
in the insectary were not seriously affected by the hurricane. Cooler 
weather during October ond November retarded development, so a period 
of Slate 4uO days was required for a generation, as compared with 13 to | 
17 days in midsummer. Moths from the 13th generation have emerged and. 
it is expected. that at least 15 generations will be produced during 
the 12-months! period. The following summary gives the average period 
of development for each stage by months. 
Average monthly development period of B. thurberiella 
at: Brownsville, ‘Tex, sul 
———— 


: Average ; Average (‘3 Averag : 
incubation ; larval 1 > pupal 5 3 Average period from 
Month eriod : period ‘ period : ege to moth 
= ' Days Days © Days 
i 3.09 8.7 7.0 19.6 
hos bel eee 4.0 734 6.6 18.0 
OUI ae 5 {29 as, 16.8 
August. ..4. 3.8 &.0 6.6 18.4 
September.. BIS {29 6.9 18.6 
October.... 4.6 10.2 8.5 | 23.3 
Novembers 4 ou 741 L308 11.3 31.4 
Season. . ue ou , re 18.9 

bY 
From 4,137 records. 
5 Fromn’3,914 records. 
Croton clean-up for cotton flea hopper control.--K. P. Ewing, Port 
Lavaca, Tex., reports that good progress was made in December on the 
Calhoun County Croton Weed Destruction Project, a C.W.A. project swer- 
vised by Mr. Ewing’ and assistants, for the control of Psallus seriatus 
Reut. Very little time was lost on account of bad weather and rains 
and the full quota of 100 men assigned to the work were available most 
of the month. The. following table gives a summary of the acreage de-— 
stroyed in the different sections of the county. ee . 

Acreage of croton destroyed from December 7 to 30, in- 
clusive, 1934 
Hand-picked Mowed : Gr and 

Location : Ranch Cultivated Total : Ranch Cultivated Total: total 
Olivind. kot. shee 703 803 ATG 39a 558 1,361 
Green Lake iMate . : 
and Sweetwater... Tu5) nd oT 745 
Seadrift and 
Long Mott..... 619 806 1, 425 ye 154 596 2,021 
SS aaa oo 2 2 2,973 721 433 1,154 4,127 
Almost half the area to be cleaned has been finished and it is hoped 
that the work may be completed by February 1. 
