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| Pinheiro,Patricia Valle; Quintela,Eliane Dias; Oliveira,Jaison Pereira de; Seraphin,José Carlos. |
| The objective of this work was to determine the most susceptible nymphal stage of Bemisia tabaci biotype B to neem (Azadirachta indica A. Juss.) oil applied to dry bean (Phaseolus vulgaris L.) in a screenhouse. A solution of commercial oil (Dalneem) extracted from neem seeds was sprayed directly on each nymphal instar at 0, 0.1, 0.25, 0.5, 1 and 2% concentrations for lethal concentration (LC) determination, and at 0, 0.5 and 1% concentrations for lethal time (LT) determination. The number of living and dead nymphs was recorded five days after spraying for LC determination, and daily during six days for LT determination. The LC50 estimated for fourth instar nymphs occurred at 0.56% concentration. For all instars, LC50 and LC95 were estimated at 0.32 and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Azadirachta indica; Phaseolus vulgaris; Immature stages; Lethal concentration; Whitefly. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000400004 |
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| Silva,Rodrigo Alves da; Quintela,Eliane Dias; Mascarin,Gabriel Moura; Barrigossi,José Alexandre Freitas; Lião,Luciano Moraes. |
| 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),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pesticide compatibility; Conidiation; Entomopathogenic fungi; Germination; Vegetative growth. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000300003 |
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| Martins,José Francisco da Silva; Botton,Marcos; Carbonari,Jairo João; Quintela,Eliane Dias. |
| O percevejo-do-colmo, Tibraca limbativentris Stal, 1860 (Heteroptera: Pentatomidae), é altamente prejudicial à cultura do arroz no Brasil, principalmente em sistemas de cultivo irrigados por inundação. O efeito de duas formas de aplicação, conídios em suspensão e veiculados em grãos de arroz autoclavado, da cepa (CP) 172 de Metarhizium anisopliae (Metsch.) Sorok., no controle do percevejo, foi avaliado em três experimentos conduzidos em 1991, 1993 e 1994, em lavoura comercial de arroz irrigado. Em 1991, tanto a pulverização de conídios como a distribuição manual grãos de arroz cobertos com material fúngico em dosagem equivalente a 7,2 x 10(13) conídios.ha-1, sobre o solo e entre os colmos de arroz, onde os percevejos estavam alojados, reduziram... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insecta; Oryza sativa; Controle microbiológico; Persistência no solo. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782004000600003 |
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