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Tomato Pinwo.rm Control 
Control of the. tomato pinworm may be obtained by using .a cryolite dust 
mixture containing 7Q. percent of sodium f luoaluminate, with talc as a diluent. 
When to treaty --In the regular .treatment schedule, the first application ( 
of cryolite dust .mixture, should be made when the first fruits on the tomato 
plant are approximately 1 inch, in diameter.. Under unusual conditions or in 
areas where the pinworm has been causing heavy- losses, a careful watch should 
be made of the plant bed and »f the newly set transplants, and if a noticeable 
infestation occurs, an application of cryolite should be made at once. 
Number of applications. — Whether the plant bed or transplants have been 
treated or not", the regular treatment schedule, beginning as indicated, should 
consist. of four applications at 10-day intervals. It is ■ important, however, 
that the fourth application be made about the time of the. first picking of 
tomato fruits for the cannery, or after the first picking for market,, and 
therefore it may be necessary to allow 2 or 3 weeks between the third and 
fourth applications, depending upon weather conditions. 
Poundage nf material per acre. — On the basis of 1,000 tomato plants per 
acre, which is the prevailing planting rate in southern California, the most 
economical results have been obtained by using a range of from 20 to 25 pounds 
of the cryolite dust mixture per acre for each application, depending on the 
size of the plants, or a total of approximately 90 pounds for the four appli-' 
cations. In any event it is important that the plants be covered thoroughly 
by the insecticide at each ap.pl ication. 
Although satisfactory control of the pinworm has been, obtained by using 
a cryolite dust mixture containing 50 percent of sodium f luoaluminate, experi- 
ments indicate that, better results can be. obtained with the higher strength 
unless the quantity of the insecticide applied at the 50-percent strength is 
increased so that the same number of pounds of the active ingredient, sodium 
f luoaluminate, is applied per acre. If the 50-percent strength is used, it is 
suggested that the rate of application range from 25 to 35 pounds per acre per 
application, or a total of . 125 pounds for the four applications. 
Tomato Russet Mite ..Control 
Sulfur is used for the control of this mite. On canning tomatoes, not 
more than 25 percent of sulfur should be used when there is fruit on the vines, 
as excess amounts of sulfur might damage the canned product. Undiluted sulfur 
can be used on small plants before the fruit has set and on larger vines if 
the fruit is not to be canned. . ... 
When to treat. — When there is danger of -early infestations (i.e., in 
later fields and in fields set out. with plants grown in or near old vines or 
fields), applications of undiluted' sulfur .should be made at or about the third 
and sixth weeks after transplanting. During the fruiting period of the plants, 
applications of 25-percent sulfur dust are made at the same time that the 
fruitworm or pinworm applications are made. If the fruit is not to be used 
for canning and insecticides are not necessary for fruitworm or pinworm con- 
trol, undiluted sulfur can be' used for the later applications after the fruit 
sets. 
