448 



Soaling seed corn in salt solution (i)p. LM>5, 1*00). — Corn was soakod in 

 brine from 10 to 20 hours before planting. "Tliis series of exjter 

 iments, extending over a jieriod of nearly a year, make it evident tliat 

 corn soaked in a saturated salt soluti<»n is as readily eaten by wire- 

 worms as if not tlius soaked, and no injury results to the wirewornis." 



Soakinff seed corn in copperas solution (]>p. 206-208). — "After two 

 seasons of exiicriiiK'ntation with the copjieras solution we have no 

 results which iiidicjite that wireworms will not rat and destroy seed 

 soakecl in this solution as readily as an\' other, and re(ci\e no injuiy 

 therel'roni." 'i'lie ad<iition of chloride of lime to the ro]»peras solution 

 did not render it elVeetive. 



Soaking seed cnni in kerosene oil or spirits of turpmtine (pj». 20H- 

 210). — In experiments made in the fall of lSfM> the kernels treated were 

 not attacked by the wireworms, but opposite results were obtained in 

 the following sjtring, so tliat the author is not jueparcd to recommend 

 either of these treat nuMits. 



Soaking seed corn in strtfrltninr s<diition ip|». L'Kt. L'l 1 ). — Seeds soaked 

 in a solution of 1 ]»art strychnine to 4(»0 or lmm» ]>artsof \\ater by weight 

 were " neithei distasteful nor <lestructive to wireworms." 



A/inijioiis disrast' of iciretrorms (\).'1\\). — Frequent leference i> m;ide 

 to the linding of '• fungus killed larva-" in the breeding <'agi's. Speci- 

 nu'ns were submitted to Protessor Thaxlj-r, who rep<»rted that the dis 

 ease was prob;il>ly i-aused by Mt ttirrhizinni tnii.sn/tlitr. 



Starratitin Inj rhan I'alUnr (pji. •Jll-21."»). — In October, 1S;k», hiiNa- 

 wen' jilaced in j-ages in which j-lover an<l timoth> had been sown, and 

 in others containing only a soil nnnle up ol sand and garden loam, or 

 of these ingredients togetln-r with hat mold. About a year from that 

 time "Just as many wiieworms remaim-d alive in the cage where no 

 vegetation had been allowed to grow as in the cheek «age in which 

 grass had been kept growing. In the cage.>-' where no more vegetation 

 ha<l grown than naturally woidd in a -ch-an fallow." over one half the 

 larva' were still alive." 



Starvation hy the grotrth o/rrrtain crops (pp. 21.»-2L'Oi. — Kxpi-rinu-nts 

 weic ina<le with buckwheat, Chinese an«l brown mustard, and iai)e. 

 l''\ce])t that no hirva was observed to change to a pupa in the cage in 

 which mustard was grown, there was no indi<ation that these cn»|>s 

 would i>re\(iit the growth of wireworms. 



Tlu^ ravorablo n-sulta n'i>orttMl fmiii jimwinp a rrop of rajie liavo no (l«iiil»t Imcii 

 dtjo in a yroat mcasnro to tlio fait fliat tin- crop is usnally nmwn antl rultivatod 

 (liirinjj the summer months, tin- period wlien a hnur percentage of the wireworms 

 are ehanginji to jtupa'. This is a eritieal ]>eviod witli these pests, for whenever they 

 have l)een disturbed in our breeding cagesat tliis time the puj>ie and thehirva- whiih 

 are eliauging to ]>up;e invariably die soon. 



E.rperiments irith insecticides (pi>. 2L'(I-L'2(»). — Kerosene emulsion was 

 fouml tobenu>re etfective than kerosene oil. The former "is readily mis 

 rible with water, and c;in be made to permeate the soil more thorotighly 

 and t«» a greater depth without as much danger of injury to vegetation. 



