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<br />80
<br />
<br />Schmid,
<br />1970.
<br />
<br />Y:.J ;L. L. 'S
<br />
<br />
<br />"",:".~ ,."" .". ..".mm. ,~. ,_, "m" _ >0,,, "'. eo>. "" ~~t. ,-VI
<br />Adults of the sprue"," beetle, De'ldroetor.u8 l'l,riperl'liG (Kirby) (Coleoptera, Scolytidae), were tagged wlth C<ldio-
<br />dctive iodlne (I-1Jl) and released to determine dispersal charactenstics. About: 4 percent were reco,,'ered.
<br />More beetles were recc.vered in easterly than in "'''''5terly quadrants, possibly because of light but variable
<br />westerly winds. Dispersal continued tOT 7 to 8 days after release. Beetles attacked the closer sa:Tlple trees
<br />first and then more dist,wt trees. Beetles infested with neJlliltodes dispersed as f,u and J.fl the same pattern
<br />as nonlnfested bp.etles.
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<br />1
<br />
<br />81 Van Deusen. James L., and Lawrenc.e D. Beagle.
<br />1970. SOME CONE AND SEED CHARACTERISTICS OF BLACK HILLS PONOEROSA PINE. USOA Fores.t Servo Res.. Note RM-179, 7 p.,
<br />illus.
<br />selected chdrdcteristic5 were obtalned from 75 5amp1e tree5 d15tributed dmong six relativel!:! distinct collection
<br />dreas. Cone lengths were qu~te unlform, averaging :.6 inche5 over the ~red; number of 5eeds per pound averdgea
<br />12,673, but ranged from 8,247 to 22,997 from indivldual trees. Numbe!" of seeds per cone was related to cone
<br />length. Green cOlles per bushel averaged 415.
<br />
<br />82 Schubert, Gilbert H., and W. J. Rietveld.
<br />1970. BRISTLECONE PINE--ITS PHENOLOGY, CONE MATURITY, AND SEED PRODUCTION IN THE SAN FRANCISCO PEAKS, ARIZONA. USDA
<br />Forest Servo Res. Note RM-180, 7 p., illus.
<br />Veqetative buds start swelling in early Jlme, ....ith bud-bursting and acti\'e elongatloll in mid-June. Male flowers
<br />are /fUture alld releasf.' pollen by late Ju1;,>. Seed viability is stronqly correlated with specific gravity (drying,
<br />maturity) of cones on the tree. COlles are uniform ~n shape, but vary greatly in size. Number of sound seeds per
<br />cone lS strongl;,> correlated '.lth total seeds. but only weakl!:! correlated with cone speciflC gravit;,> and length.
<br />
<br />83 Bergen, Jame!> D.
<br />1970. ME"A5URHlG TllUMINATION WITHIN SNOW COVER WITH CADMIUM SULFIDE" PHOTO RESISTORS. USDA Forest 5""'v. Pes. Note
<br />RM-181, 4 p.
<br />The ~'.'lridtion of cell res~tance (R) is estimated to follow 4.5SjRE'9ZS + x~ 27 where E is the total incident
<br />sola.r energy at the snow surfa.ce and X is the avera.ge attenuation ratio for radlatlon between O.51J and o.7u.
<br />The estimate of X ratJ.os dt levels ....hp.re X<O.J is insensiti"e to the \'altlp. of E.
<br />
<br />(USDA Publlcations)
<br />
<br />84 Blaisdell, James P. ,cO" Vincent L. Duvall ,. Robert W. Harris,* R. Duane Lloyd, and Elbert H. Reid.
<br />1970. RANGE ECOSYSTEM RESEARCH: THE CHALLENGE OF CHANGE. U. S. Dep. Agr., Agr. Info. Bull. 346,26 p., illus.
<br />The stOlte of rall~~ managempnt knowledge ill relatJ.on to '100115 of so~iety WJS considered b;,> ~ Forest Service
<br /><.---ommitt.?.?, and dn enlilrged concept of "ranye" was de.'eloped to inclurlp. both ecolo'lical characteristi.::s ~nd
<br />land use. Important rallg"! research needs are to: dnalyze ecosystems, illventory range re5ources, coordinate
<br />mandgement <3nd use, impro\'e resources, maintain and impro\'e environmental quality, a.nd dnd~y;;e sociJl and
<br />economic aspects of resource use. (Shortened article published in J. Range Ma~dge. 23: 227-]]4.)
<br />
<br />(Reprints)
<br />
<br />85 Hawk.sworth, F. G., and D. loj;ens...
<br />1970. BIOLOGY AND TAXONOMY OF THE DWARF MISTLETOES. Annu. Rev. Phytopathol. 8: 187-208.
<br />Summdrizes the world jlt~rature dlld research by the authors on the biology dlld taxonomy of the dwarf
<br />mistletoes. Discusses ta"onol~ic problems, he.sts. ta..-onomic chaJ'aeters, and e\'"lutlon ot' the genus,
<br />with suygestions for needed reseal-eh.
<br />
<br />86 Hawkswol'th, Frank. G., and Delbert Wiens. /r
<br />1970. NEW TAXA AND NOMENCLATURAL CHANGES IN ARCEUTH08IUM (VISCACEAE). 8rittonia 22: 265-269.
<br />Presents the [lrst sUb'Jenerie classltlcatiofl of the gellus AJ'.:'euthobiW'l. Fi"e new dwarf mistletoes are
<br />descubed (from Guatemala, Honduras, California, Jlnzona. and China). A synopsis of the 32 dwarf mistletoes
<br />recognJzed 15 given.
<br />
<br />87
<br />
<br />Jameson,
<br />1970.
<br />
<br />Donald A.
<br />DEGRADATION AND ACCUMULATION OF INHIBITORY SUBSTANCES FROM JUNIPERUS OSTEQSPERMA (TORR.) LITTLE. Plant
<br />and S011 33{I): 213-224, illus.
<br />Two or mor.;- comp-Juflds present in ledc'es of ,hmipeJ'IW ust.eoBpel'l'l~ (Torr.) Li t tl"! dre active qrowth lnhibitors.
<br />Olle of these is degrad"!d fa~rly rapidly, but the other accumulates ill the humus and in certdin heavy clay
<br />soils. This perslstent compound may slowly release monomers during de9radation.
<br />
<br />88 Knipe, O. Q.
<br />1970. LARGE SEEDS PRODUCE MORE, BETTER ALKALI SACATON PLANTS. J. Range Manage. 23: 369-371.
<br />Ldrger seeds of alkali sacaton qerminatad better iJnd faster th~n the smaller sizes. SeedlinGS from 1drger
<br />seeds emerged from deeper depths .md had a higher growth rate__. .__ ____ _
<br />
<br />Ii
<br />I
<br />
<br />
<br />McCambridge, W. F.
<br />1970. SPERMATOZOA IN UNEMERGfD FEMALE MOUNTAIN PINE BEETLES, DENDROCTONUS PONDEROSAE HOPKINS. Entomol. Sac. Ontario
<br />[Guelph, Aug. 1969J Proc. 100: 168.170.
<br />Less than 2 percent of the female mountain pine beetles found grouped undar the bark of pOllderosa pine con-
<br />taJ.lled spermatozo.a just prior to emerqence. ~Iithin 3 days a.fter emer9~llce lnto standard collection jal"s. 15
<br />percent of these sam", populations contdilled sperm. Mating in tn'2 jars lS suspected.
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<br />89
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