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WIREWORMS ATTACKING CEREAL AND FORAGE CROPS. 
These plats were carefully staked and examined from time to time, 
but at no time could any appreciable difference be noted as to their 
appearance. Wireworms were as numerous in all the treated plats 
as in the checks. Wheat was very generally attacked and no dead 
wireworms were found. 
A number of wireworms were confined in a large tin cage with 
wheat treated with strychnine as their only food. After two months 
these larve were still alive and apparently unaffected by the poison, 
though they ate the poisoned grain. 
While these experiments were going on at Wilbur a more intensive 
series was being carried on at Spokane. Here, instead of wheat, 
sweet corn was used. These experiments were carried on in a field 
recently cleared of timber. The soil was quite heavy and very 
moist. Wireworms were very numerous and apparently quite gen- 
erally distributed. 
On April 5, seed corn was treated in the following manner: | 
Lot 1. Coal tar was applied very heavily and Paris green dusted onto it 
until it was quite green. 
Lot 2 was treated by soaking for a few minutes in copper sulphate and then 
drying rapidly in the sun. Several potatoes also were soaked, cut into small 
pieces, in a saturated solution of strychnine. 
This field was all in corn in 1909 and was badly infested with 
wireworms. In 1910 it was half in wheat on fall plowing and half 
in potatoes on spring plowing, and was also badly infested this year 
with .wireworms. A plat of each treatment with a check row be- 
tween each plat was planted on each half of the field. Seventy hills 
of corn were in each plat. All the plantings were made on April 
24. The coal-tar treatment prevented about 90 per cent of the seed 
so treated from germinating, so this precludes the use, at least as 
applied to this experiment, of this seed treatment. On May 2 the 
hills were dug out and the wireworms in each hill counted. Wher- 
ever wireworms were present they were attacking the seed. The 
results of this count appear in Table I: 
TasLeE I.—RFesults of experiments against wireworms avith treated seed. 
| 
oes : Total aver- 
Number | Number of |-\ Umber ot agenumber 
Row. Treatment. of tills 74|-witeworms)| "ou vores es Cu Ny aes 
examined found per hill | worms per 
fe ; 5 (average). | hill for each 
treatment. 
Tish lSte) sy She Sib ill gee a A na a f 10 40 INS Rede ee Sees 
ieee Bites cc eit, Ate ie ale es te a ae ee eae 24 138 5.75 4,87 
piipCOalstar, and)-Paris'oreeny! =. 2s) Soe ee PAN epee eM ore] tee ee be a eS eed Ma To 
a poe hc 2 og ie i aA gn a ee | yt Meee cs |e ieee Dee Pm ee 
Gof COTES NE SC Ie Rr eee a a ee | FO pl Dees er Aes Sen [oie Se EM De ee Le 
eae CORB oe este we ee Se P| 24 390 Vea On| eyecare eee 
(ae COMES Fe CE ore fe GEE ee ats BS 24 40 EO lap oateserorc 
23H eee BA aE! Maa ae a LS We a 13 22 O92 | orien sere 
LOR ees Cee re epee ee ea er eS a 24 93 3. 875 1. 758 
