Sublethal effects of pyrethroid and neonicotinoid insecticides on Iphiseiodes zuluagai Denmark and Muma (Mesostigmata: Phytoseiidae)

• Published in: Ecotoxicology (London) Vol. 26; no. 9; pp. 1188 - 1198
• Main Authors: Zanuzo Zanardi, Odimar, Pavan Bordini, Gabriela, Aparecida Franco, Aline, Jacob, Cynthia Renata Oliveira, Takao Yamamoto, Pedro
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.11.2017; Springer; Springer Nature B.V
• Subjects: Adults; Agricultural practices; Agrochemicals; Animals; Biological control; Citrus; Citrus fruits; Cyhalothrin; Deltamethrin; Earth and Environmental Science; Ecology; Ecotoxicology; Environment; Environmental Management; Fecundity; Health aspects; Imidacloprid; Insecticides; Insecticides - toxicity; Insects; Iphiseiodes zuluagai; Larvae; Mesostigmata; Mites; Mites - drug effects; Mortality; Neonicotinoids - toxicity; Orchards; Parameter estimation; Pest control; Pesticides; Pests; Phytoseiidae; Pyrethroids; Residues; Sublethal effects; Thiamethoxam; Toxicity; Toxicity Tests, Subacute; Life-table; Sublethal effects; Integrated pest management; Predator mite; Acute toxicity
• ISSN: 0963-9292; 1573-3017
• DOI: 10.1007/s10646-017-1844-x

The predator mite Iphiseiodes zuluagai Denmark & Muma is an important biological-control agent of mite pests, and it is one of the most common species found in citrus orchards. This study assessed, under laboratory conditions, the toxicity and duration of the harmful effects of five insecticides, the three pyrethroids deltamethrin, esfenvalerate and lambda-cyhalothrin, and the two neonicotinoids imidacloprid and thiamethoxam on I. zuluagai . Furthermore, we estimated the life-table parameters of the predator. Our results showed that deltamethrin and lambda-cyhalothrin caused higher mortality of larvae and adults than imidacloprid and thiamethoxam. In contrast, esfenvalerate provided larval mortality similar to imidacloprid and thiamethoxam, but it did not cause significant adult mortality of the predator. Mites that developed on pyrethroid residues showed lower survival of the immature stages, fecundity, and longevity compared to neonicotinoid residues and the control treatment. The estimated life-table parameters indicated that deltamethrin, lambda-cyhalothrin and esfenvalerate caused greater reduction in R o and r of I. zuluagai compared with imidacloprid and thiamethoxam, which were similar to the control treatment. Besides the impacts on biological and population parameters, the duration of the harmful activity of pyrethroid insecticides was longer than the neonicotinoids. Therefore, the use of pyrethroid insecticides to control pest insects may involve serious implications for integrated pest-management programs that aim to exploit the biological control by I. zuluagai in citrus orchards.