Myers, Jacinth; Robinson, Dwight E.; Dalip, Kathy M.; Mansingh, Ajai
Author Affiliation, Ana.
Department of Life Sciences
Biocontrol potential of the nematode, Steinernema Carpocapsae (Weiser), in the management of the citrus root weevil, Exophthalmus vittatus Linn. in Jamaica
Utilization of natural products in Developing Countries: Trends and needs edited by Ajai Mansingh, Ajai, Donald E Young, Donald E. , Trevor H.Yee, Rupija Delgoda, Dwight E. Robinson,Dwight E., Errol Y. Morrison, Henry I.Lowe.
Place of Publication
The Natural Products Institute, University of the West Indies
Date of Publication
Series Editor Role
Series Volume Identification
Series Issue Identification
Abstract also published in Abstracts. International Symposium. Utilization of natural products in Developing Countries: trends and needs p. 39.
A commercial formulation of the infective juveniles (IJs) of Steinernema carpocapsae (Weiser) was assayed for infectivity to the citrus root weevil, Exophthalmus vittatus Linn., larvae in four Jamaican soil types, at four different moisture levels. The IJs entered the neonate larvae through the anus in about 3.5 hrs, and in third instar larvae, through the spiracles in about 5 hrs. The 95% ifestation (ID95) level was achieved in 19.6 hrs in the neonate larvae. The ID95 was dependent upon soil type, moisture level and the number of IJs. The 11-day ID50 was achieved with about 3, 000 IJs/dish in Linstead Clay Loam (LCL) at 25% and in Carvan Hall Clay (CHC) at 15% moisture levels, and with 5, 200 IJs in Lluidas Vale Gravelly Sandy Loam (LGSL) at 15% moisture level. Under field conditions, the persistence (in weeks) of IJs was 18 in CHC > 15.8 in Maverly Sandy Loam > 13.8 in LCL > 8.6 in LGSL. The nematodes could be promising biological control agent for the weevils, but regular seeding of soil, particularly during the post-rainy season, when the beetle breeds, would be required.....