
- 10 = 
siderable promise, especially for operations in weeds and on perennials 
where plant damage is not important. There was very little evidence of 
damage to beets in this case, and I think an oil could be developed that 
could be safely applied to the young beets in the spring if this method 
Of control is desired." 
J. R. Douglass, Estancia, N. Mex., reports that emergence of 
Epilachna corrupta was practically completed by the end of July. He says: 
"Two distinct peaks of intensive emergence from hibernation occurred; 
the first from July 1 to 5, inclusive, and the second from July 18 to 20, 
inclusive. Periods of precipitation stimulated the beetles to emerge on 
the above dates." Mr. Douglass also reports the recovery of four of the 
2,500 marked beetles of E. corrupta liberated in a mountain pass at an 
elevation of 8,700 feet on June 27. Two were recovered 4,5 miles and two 
6 miles from the point of release. 
A shipment of 500 puparia of the parasite Paradexodes epilach-= 
nae Ald., from Columbus, Ohio, was received by Mr. Douglass on July 19, 
and from this number 256 adults emerged. One hundred and ninety flies 
were liberated in the Mesilla Valley on July 28, after mating had taken 
place. Only 10 flies died during the long auto trip frem Estancia to 
Las Cruces, N. Mex. 
Neale F. Howard, Columbus, Ohio, reporting on the tachinid para— 
Site, Paradexodes epilachnae Ald., of the Mexican bean beetle, says: "The 
peak of the first-brood larvae (beetle) appeared in the field near July 
15, at which time it was possible to obtain sufficient host material for 
parasite work without resorting to-winter methods of propagation. During 
the last week of the present month (July) larvae became scarce and mater- 
ial was sent to Columbus from other parts of the country. New beetles 
and egs masses are plentiful in the bean plots at the present time but 
larvae are scarce. Twenty-one thousand five hundred and fifty larvae 
were exposed to parasites during the month (July)." Four thousand three 
hundred and forty puparia were obtained at Columbus; 500 were sent to J. 
R. Douglass, Estancia, N. Mex., and 1,827 flies emerged in the insectary 
at Columbus. The hot weather shortened the life of the adult flies mater-— 
ially. 
Owing to severe drought in the section, the experimental tobac— 
co fields at Quincy, Fla., have shown extensive damage by thrips (Frank- 
liniella fusca Hinds). F. S. Chamberlin reports that the damage in dif- 
ferent crops has varied "from zero up to 50 per cent. A few crops of 
1,200—pound yield have been reduced in price from65 cents to 355 cents per 
pound. For some undetermined reason one of the new disease-resistant 
types (94) has been found to be far more susceptible to thrips injury 
than the other types grown in this region." 
Mr. Chamberlin also states that in experiments in control of 
the tobacco flea—beetle (Epitrix parvula Fab.) it has been learned that 
"a light film" of the dust mixture of barium fluosilicate and voluminous 
Silica, a mixture once thought unsafe for application to mature foliage, 
"may be applied to the leaves with the newly designed duster during the 
latter part of the season without undue risk. * * * Tobacco treated in 
this manner can be harvested without permanent discoloration, even in the 
