Compatibilidade de isolados de Beauveria bassiana a inseticidas, herbicidas e maturadores em condições de laboratório

Abstract

ABSTRACT:The differences in the toxicity of pesticides, herbicides and ripeners for isolates AM 09, JAB 07, IBCB 07 e JAB 46 of Beauveria bassiana were evaluated through experiments conducted in culture medium. The isolates were cultured on potato dextrose agar (PDA) containing agrochemicals. Germination, growth and sporulation were evaluated and, based on these parameters, the toxicological classification of pesticides for each isolate was made. The insecticide Actara® was considered compatible with AM 09, moderately toxic for JAB 07 and toxic for IBCB 07 and JAB 46. Regente WG 800® was considered compatible with all isolates, while Temik 150® showed to be toxic. In relation to the herbicides, the product Glifosato Nortox® was considered compatible with AM 09, moderately toxic for IBCB 07 and JAB 46 and toxic for JAB 07. Plateau® was classified as moderately toxic for AM 09 and JAB 07, and toxic for IBCB 07 and JAB 46. Contain®, DMA®, Karmex®, Sencor 480® e Velpar-K® were classified as toxic for all isolates. In the case of ripeners, both Curavial K® and Moddus® showed to be toxic for all the isolates. The results revealed that there is variation between isolates of B. bassiana regarding the toxicity profile of agrochemicals. AM 09 was the most tolerant to the toxic action of the products. Germination suffered minor effect than growth and sporulation, and JAB 07 was the isolate less affected by agrochemicals with regard to this parameter.

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

“…Neves et al (2001) analyzed the compatibility of the fungi B. bassiana and M. anisopliae with different insecticides, one of which is thiamethoxam and confirmed a significant reduction in the vegetative growth of B. bassiana, in the treatments with acetamiprid and thiamethoxam, at the recommended doses. Fregonesi et al (2016) verified that thiamethoxam affected B. bassiana isolates, but did not promote significant sporulation, although it reduced the vegetative growth and the product was classified as moderately compatible. Note.…”

“…These results can be related to the germination of the fungus, which can be initiated when the conditions of the medium are favorable for vegetative growth. However, some lineages have the characteristic of germinating in unfavorable conditions (Fregonesi et al, 2016). Thus, this is a possible explanation for the good results obtained using this methodology.…”

Production of >i<Purpureocillium lilacinum>/i< and >i<Pochonia chlamydosporia>/i< by submerged fermentation, and their effects on >i<Tetranychus urticae>/i< and >i<Heterodera glycines>/i< through seed inoculation of common beans plants

“…So far, there are no published studies relating to the use of bean seed treatments with microsclerotia (MS) of P. chlamydosporia and P. lilacinum and their effect on the population reduction of T. urticae. Tamai et al (1999), Fregonesi et al (2016), Martins (2016), Galzer & Filho (2016, and Barbosa et al (2018) presented important results using biological fungal agents and bacteria to control the two-spotted spider mite.…”