Compatibility of entomopathogenic fungi with neonicotinoid insecticides

Neves, Pedro Manoel Oliveira Janeiro; Hirose, Edson; Tchujo, Paulo T.; Moino, Alcides

doi:10.1590/s1519-566x2001000200009

Cited by 123 publications

(84 citation statements)

References 3 publications

(5 reference statements)

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“…The compatibility of M. anisopliae with thiamethoxam and lambdacyhalothrin is in agreement with other studies (Batista Filho et al, 2001;Cavalcanti et al, 2002;Loureiro et al, 2002;Neves et al, 2001;Rampelotti-Ferreira et al, 2010). Despite the insecticide thiamethoxam+ lambdacyhalothrin is a combination of two compatible insec- ticides, it was scored as moderately toxic in this study.…”

Section: Discussionsupporting

confidence: 92%

Compatibility of conventional agrochemicals used in rice crops with the entomopathogenic fungus Metarhizium anisopliae

Silva

Quintela

Mascarin

et al. 2013

Sci. agric. (Piracicaba, Braz.)

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The toxicological impact of chemical pesticides on fungal entomopathogens and their use in tank-mixing can be directly measured through in vitro compatibility tests. This study reports the in vitro toxicity of eight insecticides, four fungicides and five herbicides in the conidial germination, vegetative growth and conidiation of Metarhizium anisopliae (strain CG 168). A conidial suspension containing the pesticide at recommended field dosage was subjected to constant agitation in a rotary shaker for 3h to simulate a tank mixing. Then, aliquots of each suspension were used to determine conidial germination, vegetative growth and conidiation on potato dextrose agar (PDA). The fungicides difenoconazole (69 mL ha -1 ), propiconazole (75 mL ha -1 ), trifloxystrobin (313 g ha -1 ) and azoxystrobin (56 mL ha -1 ) were the most harmful products to all biological stages of M. anisopliae and they should not be applied together with this fungus in tank mixing. The insecticides exhibited the least degree of toxicity to this fungal pathogen, whereas the herbicides had the greatest impact on mycelial growth. The agrochemicals compatible with M. anisopliae were the insecticides methyl parathion (240 mL ha -1 ), thiamethoxam (31 g ha -1 ), and lambda-cyhalothrin (6.3 mL ha -1 ) and the herbicides glyphosate (1560 mL ha -1 ), bentazon (720 mL ha -1 ), and imazapic+ imazapyr (84 g ha -1 ). The compatible pesticides could be simultaneously used with this bio-control agent for integrated pest management in rice production systems.

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Section: Discussionsupporting

confidence: 92%

Compatibility of conventional agrochemicals used in rice crops with the entomopathogenic fungus Metarhizium anisopliae

Silva

Quintela

Mascarin

et al. 2013

Sci. agric. (Piracicaba, Braz.)

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“…However, no toxicity of imidacloprid to M. anisopliae was observed by Loureiro et al (2002), and Neves et al (2001) showed that the product did not inhibit germination, radial growth or fungal reproduction. Nevertheless, according to the last authors, deltametrin presented marked toxicity to M. anisopliae and other entomopathogenic fungi.…”

Section: Commercial Namementioning

confidence: 96%

“…Several studies have analyzed the effects of pesticides on entomopathogenic fungi in order to determine their compatibility for pest control (Poprawski & Majchrowicz 1995, Neves et al 2001, Loureiro et al 2002. Most of these reports were conducted by adding products to the synthetic culture media used for fungal growth.…”

mentioning

confidence: 99%

Action of pesticides to Metarhizium anisopliae in soil

Mochi¹,

Monteiro²,

Barbosa³

2005

Neotrop. Entomol.

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Neotropical Entomology 34(6): 961-971 (2005) Ação de Pesticidas em Metarhizium anisopliae no Solo RESUMO -Este trabalho objetivou analisar a ação de alguns acaricidas, fungicidas, inseticidas e herbicidas contendo diferentes princípios ativos, sobre Metarhizium anisopliae Metsch. (Sorokin), inoculado em solo autoclavado. A ação dos pesticidas foi analisada por meio da atividade respiratória do fungo. A primeira avaliação foi realizada 48h após a inoculação, em seguida foram adicionados os pesticidas e a atividade respiratória avaliada por nove vezes a cada 48h e mais cinco vezes a cada quatro dias. Com exceção dos fungicidas, não se observou efeito significativo (P > 0,05) (Sorokin) inoculated into autoclaved soil. The action of the pesticides was evaluated based on the fungal respiratory activity. The first assessment was done at 48h after inoculation. The pesticides were then added and respiratory activity was determined nine times every 48h and an additional five times every 4 days. Except for the fungicides, no significant effect (P > 0.05) of the pesticides on M. anisopliae was observed. A reduction in CO 2 production was observed for the mancozeb treatment from day 4 to day 6 of incubation, and for tebuconazol between days 4 and 6, 8 and 10, and 32 and 36. The same was observed for copper oxychloride between days 10 and 12 and 32 and 36, and for chlorothalonyl between 8 and 10, 10 and 12, and 32 and 36 days of incubation. Identical effect occurred for the acaricides abamectin and fenbutatin oxide, with a reduction in CO 2 production between 20 and 24 days of incubation. The herbicides glyphosate, trifluralin and ametrin reduced the respiratory activity of the fungus between days 10 and 12, while the insecticide trichlorfon reduced respiratory activity only from 32 to 40 days of incubation. The results indicate that the toxic action of pesticides on the fungus in soil is small, suggesting that this pest control bioagent can be used in combination with pesticides without compromising its activity.

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“…The mechanism of action of neonicotinoid insecticides as inducers of disease resistance in plants is still unclear. Shown promising results in controlling citrus canker (FRANCIS et al, 2009), but did not affect germination, vegetative growth and pathogenicity of fungi (NEVES et al, 2001).…”

Section: A Mancha Marrom De Altenária Ou Mma (Alternaria Alternata)mentioning

confidence: 99%