ANNUAL REPORTS or DEPABTMENT OF AGBICULTUBB, LS 
Experiments with burning for the control of the grape berry moth d 
the winter period, carried on in cooperation with the Bureau of Agricultural 
Engineering, nave Indicated rather clearly thai this practice la not feasible 
.!> a means i f control. Burning over the margins of vineyards, however, otters 
considerable promise In reducing the hibernating populatl 
leaf hoppers (Erytkroneura comes Bay and related species). 
NUT INSECTS 
Further experiments In the control of the pecan nut case bearer {AoroUuis 
caryae Grote) In the Brownwood, Tex., arm have confirmed earlier work, 
indicating a control of 95 percent or hotter from two applications of 
arsenate at B Strength of 3 pounds per 100 gallons, made in the latter part 
of May or early in June, during the period of activity of iirst-brood larva 
single application gave a control of 75 percent or more. The addition of zinc 
sulphate or fish oil to the lead arsenate appeared to have comparatively little 
Influence on its effectiveness. Two applications of three-fourths of l percent 
summer oil with nicotine sulphate (1 to 1,000) gave a control Of more than 
95 percent under Texas conditions, confirming similar results which have been 
obtained in the vicinity of Albany, Ga. A single application gave results 
nearly as good. A number of commercial growers in central Texas have 
been impressed by the results obtained in nut case bearer control and are 
installing the necessary spray equipment. 
The liberations of Trichogramma minutum during 1 ( J3."> for the control of 
the pecan nut case bearer near Albany, Ga., have resulted in some reduction 
in infestation in certain orchards: in others the results have been inconclusive. 
largely because of the lightness of the infestation. Small-scale experiments in 
1984 with the use of this parasite for the control of the leaf case bearer 
(Acrooasis palliolcJla Rag.) gave an apparent reduction of about one-third 
of tiie infestation. 
Experiments in the control of the obscure scale conducted near Shreveport. 
La., have indicated further the susceptibility of pecan trees to injury from the 
use of oil sprays. It appears that the oils should be used with great caution 
on trees low in vigor. 
DRIED-FRUIT INSECTS 
At the Fresno. Calif., laboratory studies have been made of devire< for 
reducing infestation in dried raisins by the raisin moth {Bphestia figulilcUa, 
Greg.). It has been found possible to remove a substantial portion of the 
insects from raisin- on randies by passing the fruit over a specially built 
shaking and screening device. With certain varieties a reduction of more 
(ban oo percent has been accomplished. With others the n suits have been 
ess favorable and indicate the need of further adaptation. 
in preliminary experiments, a sealing mixture consisting of glucose and 
..■latin, applied to Adriatic BgS by means of a gasoline-powered paint sprayer. 
has given excellent protection from held infestation by the dried-fruit beetle 
which infests growing fruit. Contributing to the spoilage of figs by various 
micro organisms. With Cnlimyrna figs this practice appears to be of less 
ralue, since it is necessary to delay the sealing until the Bgs have been pol- 
linated by Blastophaffa. 
The workers of the Fresno station have cooperated with representatives 
->;' the Bureau of plant Industry in efforts to develop means of producing 
endosepsis-free Blastophaffa in order that those pollinating bisects may bo 
introduced into hit;i< in which they are needed, without at the same time 
Introducing endosepsis and other fig diseases. 
SUBTROPICAL FRUIT INSECTS 
The Orlando, Fla., Btation has continued Its experiments with various ad- 
hesives for use with sulphur sprays and dusts for the control o( the citrus 
rus1 mite. Of the materials tested thus far. preliminary reports indicate the 
most promise for blood albumen ami aluminum sulphate. 
The Orlando station h.-<s also conducted experiments in cooperation with 
the Bureaus of riant industry and chemistry and Soils to determine the 
• of tartar mi citrus trees when applied in small quantities in a 
tenea spray mixture. Repeated applications of b drenching spray con- 
