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Phenotypic variation in Milicia excelsa to attack by Phytolyma lata (Psyllidae)

Cobbinah, J. R ; Wagner, M. R

Forest Ecology and Management. 75(1-3):147-153, 1995

Elsevier Science BV (Netherlands)

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Título:
Phenotypic variation in Milicia excelsa to attack by Phytolyma lata (Psyllidae)
Autor: Cobbinah, J. R ; Wagner, M. R
Assuntos: Agricultural Entomology ; arboles forestales ; arbre forestier ; arvore floresta ; Control ; Damage ; Dieback ; Foliage ; Forest Pests ; Forest Trees ; Genetics ; GFIS ; Insect Pests ; melhoramento genético floresta ; organisme nuisible a la foret ; Pest Control ; Pest Resistance ; Phenotypic Variation ; plagas forestales ; Plant Pests ; praga floresta ; Resistance ; Tree Breeding ; Variation ; xxx
É parte de: Forest Ecology and Management. 75(1-3):147-153, 1995
Notas: FDC 0 Forêts, technique forestière et utilisation des produits forestiers
FDC 0 Forests, forestry and the utilization of forest products
GH-37
FDC 0 Wald, Forstwirtschaft und Verwendung der Forstprodukt
Descrição: Attempts to establish plantations of Milicia spp. (M. excelsa and M. regia), a valuable timber species in sub-Saharan Africa, have been hampered by the gall-forming psyllid Phytolyma lata, which results in dieback of foliage down to woody tissue. A study was conducted at the Forestry Research Institute, Kumasi, Ghana (in a moist semi-deciduous forest zone) to screen 21 half-sib M. excelsa progenies for pest resistance to P. lata. Results of incidence of large galls indicate that there were significant differences among individual progenies. The mean percentage of large galls ranged from 15.4 to 99.6% and 39.5-99.9% for 1992 and 1993 respectively. Four progenies (AA8, AA35, EA9 and EM1) appeared consistently resistant while five others (BK3, EM2, AA24, EA7 and VH3) were consistently susceptible to P. lata. A highly significant relationship was shown between the incidence of dieback and relative abundance of large galls (R2=0.82, d.f.=2,18, F=39.9, P=0.001) and was described by a curvilinear model. Relationships among incidence of dieback and height, number of leaves, girth and branches were also evaluated.
Editor: Elsevier Science BV (Netherlands)
Idioma: Inglês

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Phenotypic variation in Milicia excelsa to attack by Phytolyma lata (Psyllidae)

Cobbinah, J. R ; Wagner, M. R

Elsevier Science BV (Netherlands)

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