Pressão de aplicação com pulverizador de barra e eficiência de bioinseticidas fúngicos comerciais

Guimarães, Cesar de Oliveira; Correia, Antônia do Carmo Barcelos; Ferreira, Marcelo da Costa

doi:10.1590/s0100-204x2004001200003

Cited by 3 publications

(1 citation statement)

References 5 publications

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“…The application methodologies for entomopathogenic fungi are still the same used in chemical control, Guimarães, Correia, and Ferreira (2004). Most of the experiments carried out in the laboratory are carried out by spraying, immersion or trapping methods.…”

Section: Introductionmentioning

confidence: 99%

Comparision of different application methods to biological control Hypothenemus hampei

Pereira

Almeida

Filho

2021

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There are several studies that deal with the problem of infestation by Hypothenemus hampei in Coffeea arabica. However, the ways of applying products based on entomopathogenic fungi are the same as those used for chemicals. The objective of the research was to comparison different methods of application of Beauveria bassiana against H. hampei. The experiments were developed in laboratory, with blastospores and B. bassiana airborne conidia powders were carried out. Application methods based on immersion, Potter Spray Tower and walking on treated surface. Were three experiments were carried out for each method. Bioassays'design comprised seven treatments (including the control), with five repetitions (each) and 25 beetles per repetition. Suspensions were standardized at 2.4×10 9 , 1×10 9 , 5×10 8 , 1×10 8 , 5×10 7 and 1×10 7 conidia.mL -1 . Conidia powder presented initial concentration of 1.14×10 10 and it was standardized at 1.14×10 9 ; 5.7×10 9 ; 1.14×10 8 ; 5.7×10 7 ; 1.14×10 7 and 5.7×10 6 conidia.g -1 . A simultaneous test was also carried out based to the three application methods; treatment comprised conidia powder concentration of 1x10 8 and the control. Data were subjected to analysis of variance, which was followed by Tukey test (P<0.05) and, CL 50 , in the SPSS 12.1 software. The mortality better rates of H. hampei exposed to B. bassiana IBCB66 were1×10 8 (immersion), 1×10 9 (Potter Spray Tower) and 1×10 8 (walking), where as mean LC 50 were 6.1×10 8 , 4.1×10 8 , 2.4×10 8 conidia.mL -1 for each method, respectively. The highest mortality rate was recorded in the walking tests on the conidian powder at a concentration of 1×10 8 conidia.g -1 for the three repetitions of the method and also in the simultaneous test.

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Section: Introductionmentioning

confidence: 99%