Exam (elaborations)
CA BRANCH 3 WOOD DESTROYING ORGANISMS QUESTIONS WITH CORRECT ANSWERS.
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CA BRANCH 3 WOOD DESTROYING ORGANISMS QUESTIONS WITH CORRECT ANSWERS.
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CA BRANCH 3 WOOD DESTROYINGORGANISMS QUESTIONS WITH
CORRECT ANSWERS
How vvcan vvyou vvtell vvthe vvdifference vvbetween vvwood vvsuffering vvfrom vvbrown vvrot
vvand vvwood vvsuffering vvfrom vvwhite vvrot? vv- vvAnswer vvWood vvinfested vvwith vvbrown
vvrot vvtypically:
• vvappears vvdark vvbrown, vv
• vvshows vvexcessive vvshrinkage,
• vvdevelops vvcross-grain vvcracking, vvand
• vvcan vvbe vvcrushed vveasily vvto vvform vva vvbrownish vvpowder.
Wood vvinfested vvwith vvwhite vvrot vvon vvthe vvother vvhand, vvoften:
• vvappears vvwhiter vvthan vvnormal,
• vvshows vvnormal vvshrinkage,
• vvdoes vvnot vvcrack vvacross vvthe vvgrain,
• vvis vvstringy vv/ vvspongy vvto vvthe vvtouch.
What vvis vvthe vvdifference vvbetween vvthe vvstains vvcaused vvby vvstain vv(sapstain) vvfungi
vvvs. vvmold vvfungi? vv- vvAnswer vvSapstain vvfungi vvlive vvon vvthe vvstarch vvin vvwood
vvcells. vvThese vvfungi vvmay vvdiscolor vvthe vvsapwood vventirely vvor vvin vvpatches. vvThis
vvstain vvis vvdeep vvwithin vvthe vvwood vvand vvcannot vvbe vvremoved vvby vvbrushing vvor
vvplaning.
,On vvthe vvother vvhand, vvdiscoloration vvcaused vvby vvmold vvfungi vvis vvsuperficial. vvThis
vvmeans vvthat vvyou vvcan vvusually vvremove vvthe vvdiscoloration vvby vvbrushing vvor
vvplaning. vvHowever, vvon vvhardwoods vvwith vvopen vvpores vv(very vvlarge vvand vvvisible
vvvessels) vvsuch vvas vvthe vvoaks, vvthe vvsurface vvmolds vvmay vvcause vvstains vvthat
vvare vvtoo vvdeep vvto vvremove vveasily.
How vvcan vvyou vvdistinguish vvbetween vvwinged vvtermites vvand vvwinged vvants? vv-
vvAnswer vvLook vvat vvtheir vvantennae, vvwaists, vvand vvwings. vvWinged vvtermites vvhave
vvstraight vvantennae, vvthick vvwaists, vvand vvwings vvthat vvare vvequal vvin vvsize vvand
vvshape. vvWinged vvants vvhave vvbent vvantennae, vvnarrow vvwaists, vvand vvforewings
vvthat vvare vvlarger vvthan vvthe vvhind vvwings.
Name vvthe vvfour vvbasic vvcastes vvof vvtermites. vvDescribe vvthe vvbasic vvfunction(s) vvof
vveach vvcaste. vv- vvAnswer vvWorkers vv- vvgather vvfood, vvmaintain vvthe vvgalleries, vvtend
vvthe vvyoung, vvand vvgroom vvthe vvother vvtermites.
Soldiers vv- vvguard vvthe vvcolony vvagainst vvpredators.
Primary vvreproductives vv- vv"swarmers" vvthat vvfly vvout vvof vvtheir vvcolonies vvto vvstart
vvnew vvcolonies vvof vvtheir vvown. vvThey vvare vvthe vvfuture vvkinds vvand vvqueens vvof
vvnew vvcolonies.
Secondary vvreproductives vv- vvsupplement vvegg vvproduction vvin vvthe vvpresence vvof
vvthe vvking vvand vvqueen vvand vvcan vvtake vvover vvthe vvegg vvlaying vvif vvthe vvqueen
vvdies vvor vvbegins vvto vvfail.
Do vvsubterranean vvtermites vvlive vventirely vvwithin vvwood? vvWhy vvor vvwhy vvnot? vv-
vvAnswer vvNo, vvbecause vvthey vvrequire vva vvconstant vvsource vvof vvmoisture vvto
vvsurvive. vvHowever, vvthey vvcan vvlive vvin vvwood vvwith vvless vvthan vv20% vvmoisture
vvby vvgetting vvtheir vvmoisture vvfrom vvthe vvground. vvThey vvtransport vvthis vvmoisture
vvthrough vvflattened, vvearthen vvshelter vvtubes vvthat vvserve vvas vvpassageways vvfrom
vvthe vvsoil vvto vvthe vvinfested vvwood.
How vvdo vvsubterranean vvtermites vvmost vvoften vvinfest vvwood vvin vvbuildings? vv-
vvAnswer vvThey vvgain vventry vvthrough vvuntreated vvwood vvthat vvtouches vvor vvis vvclose
vvto vvthe vvground, vvparticularly vvat vvporches, vvsteps, vvand vvterraces. vvThey vvcan
vvalso vvinfest vvbuildings vvthrough vvcracks vvor vvvoids vvin vvfoundations vvor vvconcrete
vvfloors vvthat vvmake vvit vveasy vvfor vvtermites vvto vvreach vvwood vvthat vvis vvnot vvclose
vvto vvthe vvsoil.
Describe vvthe vvfrass vvpellets vvof vvdrywood vvtermites. vv- vvAnswer vvThey vvare vvsmall
vvand vvcylindrical vvwith vvsix vvdepressions vvon vvthe vvsides. vvThese vvpellets vvare
vvunique vvto vvdrywood vvtermites vvand vvare vvused vvfor vvidentification.
, Where vvdo vvdrywood vvtermites vvmost vvoften vvoccur? vv- vvAnswer vvIn vvsouthern
vvFlorida, vvsouthern vvCalifornia, vvand vvalong vvthe vvsouthern vvgulf vvcoast vvof vvthe
vvUnited vvStates.
Do vvdrywood vvtermites vvlive vventirely vvwithin vvwood? vvWhy vvor vvwhy vvnot? vv-
vvAnswer vvYes, vvbecause vvthey vvrequire vvlittle vvmoisture vv(wood vvMCs vvas vvlow vvas
vv5%). vvUnlike vvsubterranean vvtermites, vvdrywood vvtermites vvhave vvno vvconnection
vvwith vvthe vvsoil.
List vvseveral vvways vvyou vvcan vvprotect vvwood vvfrom vvtermites. vv- vvAnswer vvTo
vvprotect vvwood vvfrom vvsubterranean vvtermites, vvyou vvcan:
• vvapply vvinsecticides vvto vvthe vvsoil vvaround vvbuildings, vvand
• vvavoid vvusing vvwood vvmulches vvnext vvto vvbuildings.
To vvprotect vvwood vvfrom vvsubterranean vvand vvdrywood vvtermites, vvyou vvcan:
• vvuse vvphysical vvbarriers vvon vvfoundations, vvand
• vvuse vvproperly vvpreserved vvwood, vvwhich vvmakes vvit vvundesirable vvas vva vvfood
vvsource.
Describe vvthe vvfrass vvof vvpowderpost vvbeetles. vv- vvAnswer vvPowderpost vvbeetle
vvfrass vvappears vvas vva vvfine vvwood vvdust vvor vvpowder. vvSlight vvjarring vvof vvinfested
vvwood vvcan vvcause vvthe vvfrass vvto vvsift vvfrom vvholes. vvThis vvis vva vvsure vvsign vvof vva
vvpowderpost vvbeetle vvinfestation. vvIn vvaddition, vvthe vvfrass vvof vvanobiid vvbeetles
vvhas vva vvdistinctive vvhotdog vvbun vvshape.
For vvmost vvwood-boring vvbeetles, vvwhat vvlife vvstage vvcauses vvthe vvmost vvdamage
vvto vvwood vvby vvboring vvinside vvthe vvwood? vv- vvAnswer vvThe vvlarvae vv(grub). vvThe
vvexception vvis vvthe vvambrosia vvbeetle vvin vvwhich vvthe vvadult vvbores vvwithin vvthe
vvwood.
How vvdo vvambrosia vvbeetles vvdamage vvwood? vv- vvAnswer vvThey vvdegrade vvwood
vvby vvstaining vvit, vvby vvcreating vvnumerous vventrance vvholes vv(pinholes), vvand vvby
vvboring vvinside vvthe vvwood.
What vvtype vvof vvwood vvdoes vveach vvgroup vvof vvwood vvboring vvbeetles vvdiscussed
vvin vvthis vvmanual vvprefer? vv- vvAnswer vvAmbrosia vvbeetles vv- vvgreen vvlogs vvor vvgreen
vvlumber; vvsoftwoods vvand vvhardwoods.
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