Seleção de isolados de fungos entomopatogênicos para o controle de Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) e sua compatibilidade com alguns inseticidas usados na cultura do tomateiro

Abstract

-The activity of Metarhizium anisopliae and Beauveria bassiana towards eggs and larvae of Tuta absoluta (Meyrick) was evaluated. Our data showed that the isolates were pathogenic to both developmental stages tested and the eggs were more susceptible than the 1 st instars. The isolates URPE-6 and URPE-19 of M. anisopliae were more pathogenic to eggs and larvae, respectively. The compatibility of these two isolates with the insecticides chlorfenapyr, spinosad, indoxacarb, abamectin, and neem were evaluated. Spinosad and indoxacarb were compatible with the two M. anisopliae isolates in all tested concentrations. At the average recommended concentration, chlorfenapyr was compatible to URPE-6 and abamectin to UFPE-19. The use of entomopathogenic fungi associated with compatible insecticides may be a useful alternative to control T. absoluta.

Adaptation of Indigenous Larval Parasitoids to <I>Tuta absoluta</I> (Lepidoptera: Gelechiidae) in Italy

“…So, as an alternative approach, biological control has been actively pursued. Several natural enemies occurring in its native area have been reported as fully documented by Desneux et al (2010), and the efficacy of entomopathogenic fungi, bacteria and nematodes have also been evaluated for the implementation of biological control strategies (Batalla-Carrera et al 2010, Pires et al 2010, Hernández-Fernández et al 2011. Natural enemies have been investigated in many South American countries with the aim of using them in biological control programs; in particular, resea rc h has bee n ca rr ied o ut o n e gg pa ras ito id s s uc h as Trichogramma pretiosum (Pratissoli and Parra 2000, Zucchi and Querino 2000, Faria et al 2008, Desneux et al 2010, Virgala and Botto 2010, and larval parasitoids such as Apanteles gelechiidivoris Mars h, Pseudapanteles dignus (Muesebeck), Bracon spp.…”

Effect of Agrochemicals Used in the Cultivation of Soybean and Irrigated Rice on Beauveria bassiana (Bals.) Vuill. and Metarhizium anisopliae (Metsch.) Sorok

“…This result is in agreement with the one obtained by Soares and Monteiro (2011), where they verified that insecticides containing spinosad, did not significantly reduce mycelial growth and sporulation of M. anisopleae. Pires et al (2010), also analyzed the selectivity of spinosad to M. anisopliae isolates, where all the concentrations tested did not alter the diameter of the colonies.…”

Compatibility of Beauveria bassiana and alternative phytosanitary products

“…The index considers the production of conidia as a more important factor than vegetative growth, since they are the propagules of the fungus that will act in the development of the disease in the insect (Moino and Alves 1998). There are studies in the literature that evaluate the toxicity of the products, using the equation model proposed by Alves et al (1998b) (Cavalcanti et al 2002;de Oliveira et al 2003;Santos et al 2009;Mertz et al 2010;Ferreira 2011), and works evaluating the Biological Index proposed by Rossi-Zalaf et al (2008) (Pires et al 2010;Ferreira 2011;Mamprim et al 2013).…”

“…In addition to APPs, entomopathogenic fungi are important for pest control, especially Beauveria bassiana (Balsamo -Crivelli) Vuilemin which is pathogenic to a variety of insects (Pires et al 2010;Potrich et al 2011;Rondelli et al 2012;Huang et al 2013;Alberto et al 2016;Toledo et al 2017).…”