000			034080000a22005650004500
911			_aXL1998501870
901			_aH10
903			_aE
904			_aBCO
905			_aC
906			_a19980101
908			_aJ
909			_aAS
912			_aEn
912			_aEn
914			_aBCO
090			_aAV _b634.96 no. 3
100	1		_999140 _aNewton, A.C.
100	1		_959048 _aCornelius, J.P.
100	1		_993912 _aMesén, J.F.
100	1		_958999 _aCorea, E.A.
100	1		_9130731 _aWatt, A.D.
260			_c1988
041	0		_aEn
500			_a6 fig. 31 ref. Sum. (En)
520			_aIn order to evaluate the relationships between attacks by the mahogany shoot borer Hypsipyla grandella (Zeller) and host growth and phenology, field trials of Spanish cedar Cedrela odorata and American mahogany Swietenia macrophylla established in Costa Rica were assessed intensively over an 84 week period. Height growth of C. odorata was approximately twice that of S. macrophylla, with mean growth rates of 2.0 and 1.3 cm week-1 respectively. Cedrela odorata displayed pronounced temporal variation in leaf phenology, with a minimum of 51 percent of trees in leaf during a relatively dry period. In contrast, the minimum proportion of foliated S. macrophylla trees was 87 percent. No shoot borer attacks were recorded on S. macrophylla until week 50 after the onset of assessments, whereas initial attacks of C. odorata were recorded during week 6. By week 84, the proportion of trees attacked was 74 percent and 77 percent, respectively. In both species, attacks were concentrated in seasonal peaks, coinciden with the production of new shoots. Pronounced spatial variation in attack was observed in both species. At week 12, the number of attacks per block in C. odorata was negatively correlated with available calcium concentration (r=0.85, P<0.001), whereas mean height growth of C. odorata was positively correlated with available phosphate concentration (r=0.84; P<0.001). Significant variation in height to firest damaging attack was observed in both species. By the end of the observational period, only 6 percent of C. odorata and 0.4 percent S. macrophylla remained undamaged to a height of 3 m. It is suggested that control methods for the mahogany shoot borer should take account of temporal dynamics in attack, and relationship to host phenology. Manipulation of the soil nutrient status may also form part of an integrated approach to pest management.
650	1	4	_9150731 _aHYPSIPYLA GRANDELLA
650	1	4	_9139864 _aCEDRELA ODORATA
650	1	4	_9150592 _aHUESPEDES
650	1	4	_9147746 _aFENOLOGIA
650	1	4	_9158715 _aPLAGAS FORESTALES
650	1	4	_92064 _aCOSTA RICA
691			_9150731 _aHYPSIPYLA GRANDELLA
691			_9139864 _aCEDRELA ODORATA
691			_9322225 _aHOSTS
691			_9158293 _aPHENOLOGY
691			_9319602 _aFOREST PESTS
691			_aCOSTA RICA _92064
692			_aHYPSIPYLA GRANDELLA
692			_aCEDRELA ODORATA
692			_aHOTE
692			_aPHENOLOGIE
692			_aORGANISME NUISIBLE A LA FORET
692			_aCOSTA RICA
773	0		_tBulletin of Entomological Research (RU) _d1988 _gv. 88 p. 319-326
040			_aCR-TuBCO _cCR-TuBCO _bEs
245	1	0	_aVariation in attack by the mahony shoot borer, Hypsipyla grandella (Lepidoptera: Pyralidae), in relation to host growth and phenology
942			_cANA
003			CR-TuBCO
999			_c107663 _d107663