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Biological control of latania scale on avocados in South-East Queensland

by Waite, G.K.
Publisher: Dic 1988ISSN: 0157-7794.Subject(s): PERSEA AMERICANA | HEMIBERLESIA LATANIAE | PLAGAS DE PLANTAS | ORGANISMOS PATOGENOS | MORBOSIDAD | ENEMIGOS NATURALES | CONTROL BIOLOGICO | CONTROL QUIMICO | CONTROL DE PLAGAS | PERSEA AMERICANA | PESTS OF PLANTS | PATHOGENS | MORBIDITY | NATURAL ENEMIES | BIOLOGICAL CONTROL | CHEMICAL CONTROL | PEST CONTROL | PERSEA AMERICANA | RAVAGEUR DES PLANTES | AGENT PATHOGENE | MORBIDITE | ENNEMI NATUREL | LUTTE BIOLOGIQUE | LUTTE CHIMIQUE | LUTTE ANTIRAVAGEUROnline Resources: Es In: Queensland Journal of Agricultural and Animal Sciences (Australia) v. 45(2) p. 165-167Summary: Avocado fruit of the varieties Fuerte and Hass were caged to exclude natural enemies of latania scale Hemiberlesia lataniae (Signoret), in an unsprayed orchard and an orchard sprayer regularly with endosulfan during 1985 and 1986. Scale infestations at harvest were compared with those on uncaged fruit. On unsprayed trees in 1985, caged fruit were infested with an average of 100.5 adult scales, 82.8 percent of which were alive. Uncaged fruit were infested with only 4.6 adult scales per fruit of which 24.3 percent were alive, 30.7 percent were parasitised and 19.3 percent were killed by predators. On sprayed trees caged fruit were infested with 101.3 scales per fruit 51.9 percent of which were alive. Uncaged fruit carried 15.3 scales per fruit of which 17.3 percent were alive, 19.0 percent were parasitised and 25.0 percent were killed by predators. Similar results were recorded in 1986. It was concluded that H. lataniae can be controlled by natural enemies in commercially sprayed orchards, provided an integrated approach is pursued.
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Avocado fruit of the varieties Fuerte and Hass were caged to exclude natural enemies of latania scale Hemiberlesia lataniae (Signoret), in an unsprayed orchard and an orchard sprayer regularly with endosulfan during 1985 and 1986. Scale infestations at harvest were compared with those on uncaged fruit. On unsprayed trees in 1985, caged fruit were infested with an average of 100.5 adult scales, 82.8 percent of which were alive. Uncaged fruit were infested with only 4.6 adult scales per fruit of which 24.3 percent were alive, 30.7 percent were parasitised and 19.3 percent were killed by predators. On sprayed trees caged fruit were infested with 101.3 scales per fruit 51.9 percent of which were alive. Uncaged fruit carried 15.3 scales per fruit of which 17.3 percent were alive, 19.0 percent were parasitised and 25.0 percent were killed by predators. Similar results were recorded in 1986. It was concluded that H. lataniae can be controlled by natural enemies in commercially sprayed orchards, provided an integrated approach is pursued.

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