Sample size for monitoring sirex populations and their natural enemies

Susete do Rocio Chiarello Penteado; Edilson Batista de Oliveira; Edson Tadeu Iede

doi:10.4336/2016.pfb.36.87.788

Authors

Susete do Rocio Chiarello Penteado Embrapa Florestas https://orcid.org/0000-0001-7237-5862
Edilson Batista de Oliveira Embrapa Florestas https://orcid.org/0000-0002-5924-817X
Edson Tadeu Iede Embrapa Florestas https://orcid.org/0000-0001-5284-6946

DOI:

https://doi.org/10.4336/2016.pfb.36.87.788

Keywords:

hierarchical sampling, Sirex noctilio, control, nematode, parasite

Abstract

The woodwasp Sirex noctilio Fabricius (Hymenoptera: Siricidae) was introduced in Brazil in 1988 and became the main pest in pine plantations. It has spread to about 1.000.000 ha, at different population levels, in the states of Rio Grande do Sul, Santa Catarina, Paraná, São Paulo and Minas Gerais. Control is done mainly by using a nematode, Deladenus siricidicola Bedding (Nematoda: Neothylenchidae). The evaluation of the efficiency of natural enemies has been difficult because there are no appropriate sampling systems. This study tested a hierarchical sampling system to define the sample size to monitor the S. noctilio population and the efficiency of their natural enemies, which was found to be perfectly adequate.

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Author Biographies

Susete do Rocio Chiarello Penteado, Embrapa Florestas

http://lattes.cnpq.br/8480560760428714

Edilson Batista de Oliveira, Embrapa Florestas

http://lattes.cnpq.br/5631628199397955

Edson Tadeu Iede, Embrapa Florestas

http://lattes.cnpq.br/4596617858148701

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