| Show GERMAN AKMAN TREE P PEST S I 1 S electric search beams lure lur e moths into reath heath traps measure mease re mada mad a necessary by ravages ot of in insect acts known as ae nuns nune which c h threatened to destroy conifers of saxon forests berlin the foresters of 0 germany lure noxious insects to their doom b by y the use usa ot of electric lights and other fiery attractions the experiments ot of the foresters forestel 8 were made necessary by the ravages of moths known popularly through I 1 out germany as the nuns which threatened to destroy the conifers of 0 the forests or oc saxony the moths in question are trost active between the hours af t 10 p m and i 1 a in and they are then attracted powerfully fully toward sources of light experiments demonstrated that the nuns were attracted by the flaros of at aljy crip b ipri lii I 1 mra a e powe powerfully raully by the electric arc tho the alluring of the moths was waa accomplished complis hed at zittau by operation cooperation co between the foresters and the municipal electrio electric works the entire stock of arc afe lamps was linked together after the globes had bad been removed and set in activity after nightfall although the forests were several miles distant the effect of the total illumination was sufficiently strong to attract vast swarms ot or moths motha frow from their leafy shelter they fluttered the glowing carbons and quantities fell to the earth with singed wings although great numbers were permanently disabled it was evident that the destructive factor be greatly multiplied to ro attain appreciable results por lor that reason another plan was tried at 11 p in the street lights were turned oft off electric searchlights with a current of 40 amperes were mounted and their rul rays raya were directed upon the neighboring forests these searchlights exerted great at force which was increased by linking to each two arc lamps with globes between these two lamps a powerful suction auction ventilator was sta cloned A piece of wire netting was placed opposite the outlet of the ventilator a few inches distant the results were startling the moths came from the foreith in enormous numbers and sooner or later were sucked into the ventilator and hurled hy by it against the wire netting w with ith such force that thai the wings were brok broken a n an and d the I 1 insects rendered helpless or killed outright four of devices were installed in the town of 0 zittau on the roots of bildings beddings bud bul dings A few minutes after the la Is turned on scattered marths appear then the number rapidly increases until thousands arrive simultaneously and flutter butter in and out ot the great boam boain or of light beadily Blea dlly they sear near its source until suddenly dOnly they are within tle the grasp or of th be unseen mu aloa of abe ventilator dod in a secord they pass pasa through it and fall and helpless help lees to tile the bottom of thy wire cage caga adu maximum result attained la in a single night by this method was a total weight f r pounds representing about dead moths the outcome of these ex on ts nas has been so convincing that it will b h continued on a much extended scale the officials of the united states department pt agriculture have trien hien greatly interested by the reports ns be the quest lop of oe protection from in beets s enel eneix of shade trees dees a nev kaig angland Is n d al a J r of american forests generally ciui fia of talo late assumed much proui prominent luello experiments ants to la Ame america it Is report ul pil along the lines laid down by the loii of zittau will probably bo be un der taken under the auspices 4 the department dopart ment ot of agriculture next j ar |
