Environmental Entomology (1993) 22, 319-325

Eraneo B. Lapis and John H. Borden (1993)
Components of resistance in Leucaena collinsii (Leguminosae) to Heteropsylla cubana (Homoptera: Psyllidae)
Environmental Entomology 22 (2), 319-325
Abstract: The mechanisms of resistance of Leucaena collinsii Rose and Britton against the psyllid Heteropsylla cubana Crawford were investigated by comparing the plant's response to the psyllid and the psyllid's behavioral and growth responses to the trees, using Leucaena leucocephala (Lam.) de Wit as the susceptible control. Potted trees in the field were treated with fenvalerate to remove all insects. Four days later, the numbers of adults per shoot and the percentage of trees recolonized were 76-84 and 65% lower, respectively, for L. collinsii compared with L. leucocephala. The numbers of eggs oviposited on L. collinsii were 46 and 63% lower than on L. leucocephala in field and laboratory experiments, respectively. There was also well over 90% reduction in adult eclosion, a smaller adult size and about 67% reduction in nymphal survival on L. collinsii than on L. leucocephala. Premature leaflet senescence and abscission as well as intraspecific competition for feeding sites on L. collinsii may have a severe effect on nymphal survival. These results disclose several mechanisms of antixenotic and antibiotic resistance that should be considered in resistance selection and breeding programs.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): John H. Borden

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Heteropsylla cubana	Leucaena (crop)	Philippines