Mexico 
Mexico 
California 
-192- 
SUGAR CANE 
SMALLER SUGAR-CANE MOTH BCRSR fCliilo. lpftini Pyar ) 
R. H. Van Zffaluwenb^rg. (June 25): The most important sugar-cane 
pest in the State of Sinal&a, "breeding throughout the year* 
This year* it greatly outnumbers Diatraea 1 ineolata walk*, 
"between 80 and 90 per cent of all stalks "being infested, and^ 
aoout 15. per- cent of all joints.. Infestation practically uni- 
form in plant and ratoon cane. Other hosts are rice, corn, 
sorghum, para grass, Johnston grass ,and a native river-cane. 
In volunteer rice this spring it was parasitized by Ch el onus 
sp* to the extent of ahout 23 per cent. In addition two 
species of Ichneumonidae parasitize -it in this .locality* 
SUGAR-CANE BORER (Diatraea saccharalis Fab,) 
R* H. Van Zwaluwoahurg.. (June 25) : Next to Chilo the most 
important pest ro\' sugar-cane in western Mexico*. Present in 
somewhat less numbers this past season as compared with the 
two previous crops. Primarily .a pest of plant ,cane; infestation 
in iatoons is inva*5.a"bly much lower, percentage of stalks 
infested, season of 1924* Pall and spring plant cane, 60 
per cent; ratoons (all ages),, ~5o per cent. Percentage of 
joints infested: Plant cane, S per cent; ratoons, h per cent. 
Prom October to May it is present in larval and pupal stages 
only. Earliest emergence of adult noted this year, May U. 
Heavily parasitized "by T r ichogr are na- m inuturo Riley which was 
already at work on eggs of the first generation early in 
June. A native ichneumonid also parasitizes this species, 
"but only rarely. ■ . 
A BLACK. BEETLE (pf obahly "Eleodes omissa bo real is Blais. ) 
E* A B McGregor (June 19)': Mr* McLaren, manager, took us over th 
2,000-acre ranch at Alpaugh, in Tulare County. We had no 
trouble finding the cause of the a'tarnw, The offender is a 
large "black tenelirionid beetle. The insect is inactive during 
the daytime, hiding then under the protection of earth clods, 
clumps of wecdg fence rails,, old "burlap, etc. From our 
studies it seemed certain that the pest occurred in. this 
field at the date of easily 10,000 individuals per acre. Of t"ho 
2,000 acres in the entire ranch, SO acres were heavily in- 
fested,, 
The work consists in gnawing the main stem at the crown 
of the plant, resulting either in the complete severence of the 
■ stem or in tippling ib over so that the terminal portion dies. 
Many plants were thus attacked. The encroachment of the pest 
seemed to take place Chiefly from a witd uncultivated area 
lying to the south and west of the cotton field. The ranch 
manager claimed that the migration took place from the south- 
west, and that the individuals advance at a good rate of travel. 
The greatest concentration of the pest appeared to be among 
