Show W 1 ca st A results suit love have been obtained in tri tig ahm of fazatte jn sects affecting forest resources according to the annual report ot of the chief of the bureau of en an toino tom logy united S states is department part ment ot of agriculture the report bays of western field work an bipedal investigation of the 1 in beet act damage to crude sm spruce products product tor for airplane stock in the states ot of washington and oregon show showed it that the greater part pact it if not at all of tic the do it dam age could be presented lamented by raper proper methods of if logging rod and production with little or no a additional cost AT seh exhaustive live studio studies of if insect itt fiction and ad control were war continued cautioned 1 in sequoia and yosemite 1 national I I 1 parks packs much new information he has been gained and the methods of gathering and ad compiling filid field data be have be been standardized A special study was w completed complete on mor the interrelation of forest cat time fires and erects on an area of about 2 acres jt southern oregon this seen area has be been under mile observation since 1914 and the fire had bad birned over halt about soo acres re A in 1918 the tae records show that previous on to the the fire the insects had killed OW b board AT feet fast of timber the lira fire killed feet and subsequently the slightly fire injured a as well as the uninjured trees in the burned area were killed Tied by beetles which were at tracked eted fr from the war surrounding rounding areas it we was noticed A it ill that at the infestation in ill the A burned are area increased eased more are the than iner 1000 per par cent I 1 but it I 1 was found that the infestation in the surrounding aras d decreased ased it was also found that the broods of the beetles in the fire sc orbed thed trees failed to develop to aimeb beona the original number that I 1 attacked the trees so the fire did not contribute to an increase of the beetles 1 in g general gend end area a or to the a aaram starting or extension of an epidemic of beetles TL this Is result Is of extreme interest and hardly to be expected rho rhe most at careful study a air maile maid of the blin history or y of an epidemic In iafeta feta th A of he tree le killing beetles beetle re was emmi corn plead annii ad a report submitted during the vear mar to in the rogue aher area in about 48 acres cre near ashland ahland ore the west western tt pine tic beetle in 1914 caused the of board feet of pine timber in 1 1911 5 board feet were killed billed 1383 feet in 1910 1916 rod and 1 in 1917 A em count ant or of the oune and kanitur matured 1 I stages of ill the beetles that r developed in an average oot of if bark and ad also Is of the number of exit holes hall through which mach the beetles emerged to attack other trees showed that thine woss was A 11 notable decrease tn in numbers during the development of the broods brood each vear ear 1 in the intoned infested trees on mi lo ac count A ant of the increase of naturel en emall and ad oilier all Alls tabIng factors this relps explain why oby these beetle epidemics rise and full within a lim led permit period of mars jears and it explains call how the western w tere forests of yellow pine are naturally mau protected from total destruction these facts fact are arc especially significant in connection connect iti with the ap vitiation of the percentage principle of control central as by aidina the natural total to forces which work jos the fi harmil 1 an fn mass crease and ad epidemic shows show the ampol tance of prompt recognition and prompt treatment of a threatened outbreak outa in orilar to prevent A tit the great loss fins of limber her which ach would mild occur before natural control fine became m operative abnot another ax anak special I 1 study to 7 was made a of the number of all stages of the nest lest ern pine beetle to in square feet of thle t al bulk bark lichi selected fAid fix from 67 trees which represented an crage till within an at area sit of to is miles 11 I 1 it was A shown lou A that chere her la Is a laige foreen percentage tage of immortal liy As between the young and natured aured 11 9 e in the de developing loping broods out nut kinf 11 nort 6 r nully BB an zeruie go of if out 1 2 0 t a to hie lie square toot foot of hark ile da I 1 al dw lo an 1 the h ad adult V or rep reproductive ji IA LRA ton stage e liali ial 1 would be baide i A 8 1 A to the average infested tree or say illy 30 beetles to 1000 board test feet of timber kjile it requires an ii ge of about I 1 10 0 beetles to the square foot to attack and kill hill a vigorous healthy tree it will be seen that all 11 the pine timber of the western wester forests would soon be des destroyed troed were it not tor for nat mat urn ural and artificial control to d determine the time of year to cut at and ad the methods limit of 1 hun ban alling ahng ni quite tor for fuel fall posts etc are to envold deste thin by wood mad boring to in sects have be been nearly completed R and d the results result show how att serious action loss ime in the Smith southwest wast enn can be prevented eted by cutting the trees in the inte foil fail m and PAT early winter and piling the wood in looe pah piles until ill it Is As thoroughly th dry do damage am 9 1 to posts can be for by cettl cutting A ir I 1 bliem at any time and lading labas the them on the aa gronna F it where there they will receive the full fail force of the so un turn into joe ing them oce occasionally so in that last tile the young sl at igus iges of fit the borers will be kill ed all hy by the heat studies of a image ame to telephone cables tn in Call california farill by a wood boring beetle hae be hem continued and ad the results so fur far stio hw that hat the beatle is able to p arte allowed substances that anre a cOnsid libl harder than lead the problem prot lem 1 Is still till un unsolved Id and it will ill be difficult dilu cult to find a en mentis enins ins of controlling this pat which Is able to put lam hundreds dred of homs hans out of cani commission mashin by boring holes in the cable calileo t through it ugh which the amr ente entes s rendering the wire ir connection until the he pin place is found and ad it 6 af A star of the mit houll parks park 1 ti thel their rang clist forests the to for c esta Is or are atas alwais in longer danger or of insect foe vigilance Is the price or at healthy health forests till the norh tit in general has hardly illy beem lisp begun it will have to in he put a on A su s secure u bull basis financially and made a regular pirl of and I 1 park raffina in a park like rocks ala A at which has box nt at I present s t nn annual apon protho of but B A au sum antan ih aft dent clear een for it its protect protection inn old tal al af lion i insect act control ant 1 Is of con course Practical tv neglected the pen a y will be pit paid 11 later late 1 in yo yosemite ita A suy su y of the I 1 lellow S agar and ad jeffra pine are areas of he ok made imah last spring allind dl lind he fait fail that th these beirs were ecra tiona tlona lly y ft diee fr from hark bark beetles which DO active control claim lias has heeti for far se votes ahe beciri c condition am tn afi the 1 lodgepole IT gadde arias aras Is not lot so a hopf hopeful in a f amt it it 1 Is serious Berio iia large of 0 this fi have bar he heen eri A licit killet killed timm the fant of air loan 1 I AIR time pine beetle dibran reit re rei i it lit A or I 1 ahe he r and A most a in it ohp I destruction of he a hired of ile hie tnuva A A A basal tilt T IT it I 1 of A to in time note hint door hda the actual killing billing of the trees is in do ana to the attacks of alf tho the bark beetle ab tha att atticks lis of this taj I 1 infelt t are his invariably preceded by attacks a on the foliage by an olt altogether geth alfter different t insect the tha er needle miner mine th the latter attacks the tha needa of if the first discolor ing th foliage and eventually c causing 14 complete defoliation curiously enough these attacks although they may der continue for or several tears seldom or arg dirac alv for their beath they rio AIR however bover bo ver sop sap the vitality of AT the trees brer which 1 h so im weakened fall easy prey r ey to a tle the bark beetle bl chich h follows in due coulse couise the lod depole stand in and around the meadows Is tow thren aimed teneil it de strut ten tion similar to 1 that sui IT 11 the he tend R in 1 the cthel I gre cr ad benaia ten A I 1 ake basins balna during the venson canon of S the epst t ern c pine beetle h and mountain mount nin A in pine nine isit beetle killed kill AT aly GOU ono fut fu t of merchantable in vellow allow pine pin and sugar sugarpine sug arpine pine baar eunhi the marble ilk bold I lk and ad cartus cr creek k be basins 1 in se note national paik according arda g t tc rec me fr from ibi marlcek A ailed riled and A A stud led fed by the file united states stater anon ol 01 j A 4 fund left a r from ill the i project in the sidille folk of the hill kiech li river a unit it so an 10 which hid bd bell been completed tAd was expended expanded athe in th ticia liast of this his infestation during the a of lqis hot as aa 1 to boier the entile area are involved it tia uniting during the 6 fiscal I 1 vear car laid the but bu s renu of alured on some nork mark wah his own 0 1 in omer to in biet the oren area 1 treated ted in 1418 and A nl o to demonstrate acmon citrate und mid test a new a method of pill ng the bm pe percentage penone none m 0 control A method indian ot of its dettro tr vinc oring the th broods of the western pine beetle with este out rethu re thu to the ta ute of fire is being developed ped which it I 1 belle belled believed d ill deel make Ps ILL the a of on tro 1 i k then ho hout the summer a amer Z rd m acera c ter mark the 11 iriki II iii I total t ala af in part pact C continued with chem chain A I 1 s applied to finished and crude crad forest products p hicks show that acry let few fee of f the diaan bs tancel that hae be laen tiled aled rea efie I 1 the and with bruile mile products prod A ats none of them la as so am I A aa liepe 1 n 1 1 I and ad l al in locking sell and in h ill HII ill render mader the ill million of the be hark bark and ad till the wood claf unfavorable ald to att hank 1 continued continue of t terin nal lle or title not apt to the woodworth r it of nt theAl has tell leil to the A aery gait one of the most pro pan call a noi lne hae if ff debri d of and tomI in arua or f imi A TILLI ti ar 1 iam it bieni A I 1 pPe Arna of at the so ad A 1 toa is J locust re or 1 awl I 1 1 lied giai as 91 glen am an it ap pp AIRL far heinli of if cirialo rail od mil aaa lai hiie hire hien nalla |