32 BULLETIN" 333, U. S. DEPARTMENT OF AGEICULTUBE. 
cleared land should be avoided in planting nursery stock. In case of 
nursery stock, Herrick recommends the growing of two or three 
cereal crops on newly cleared land before setting out pecan stock, 
and suggests experiments with commercial fertilizers. Experiments 
with commercial fertilizers and chemical compounds to determine 
whether they will serve as preventives are to be conducted by the 
Bureau of Entomology. 
Sometimes injury by termites to corn in Kansas, according to 
Marlatt, is due to the method of plowing under old stubble, in 
which the insects breed. This practice should be discontinued if 
there is serious damage by white ants. Allowing the land to lie 
fallow for one year before planting should be of value ; the same can 
be said of deep fall plowing. The practice of better farming meth- 
ods, with rotation of crops, wiU prevent damage to field crops. 
In case of vineyards care should be taken in pruning operations 
to reduce the surfaces cicatrized; all dead or diseased vines should 
be removed. Cuts should be painted over with coal tar. The various 
mastics employed in grafting may prove to be effective preventives. 
Primings should not be left hung on the ground, but should be 
burned. 
FLOWERS AND GREENHOUSE STOCK. 
In case of flower or truck gardens, especially where near the wood- 
work of buildings, less animal manure should be used, in order to 
protect not only the building but also the plants. 
In greenhouses the removal of decayed infested wood will prevent 
the plants from becoming infested in turn. Iron frames and con- 
crete work should wherever possible replace woodwork, and wood- 
work should be impregnated with bichlorid of mercury. Wood im- 
pregnated with this preservative can be painted after treatment. 
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