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Biological characteristics of Heliothis virescens fed with Bt-soybean MON 87701 × MON 89788 and its conventional isoline 42
BORTOLOTTO,ORCIAL C.; BUENO,ADENEY F.; BRAGA,KARLA; BARBOSA,GUSTAVO C.; SANZOVO,ALISSON.
This study aimed to evaluate the larval biology of Heliothis virescens in soybean MON 87701 x MON 89788 and its isogenic non-Bt. In general, the impact of soybean MON 87701 x MON 89788 on H. virescens was evidenced in all bioassays, 100% larval mortality, independent of the structure (leaf or pod) consumed by the pest. The small larvae (1st and 3rdinstar) demonstrated that they were unable to damage fresh pods of soybean, regardless of whether Bt or not Bt. The large larvae (5th instar) fed on soybean MON 87701 x MON 89788 soybeans consumed three times less compared to larvae fed on non-Bt soybeans, and resulted in reduced longevity and larval survival. When soybean plants were infested with 5th instar larvae, H. virescens caused injuries in the steams of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Varietal resistance; Tobacco budworm; Soybean pests; Lepidoptera pests; Heliothinae.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000200973
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Development and soybean leaf consumption by Urbanus proteus proteus (L.) 63
Nava,Dori Edson; Parra,José Roberto Postali.
Urbanus proteus proteus (L.) is a defoliating pest of legumes, causing damage mainly on soybean (Glycine max (L.) Merr.) and bean (Phaseolus vulgaris L.), and, being a minor pest, little is known about its bioecology. The objective of this paper was to study the larval and pupal development of the insect and the foliar consumption during its instars. Durations of 16.7; 1.1; 11.4 and 29.2 days were determined for the caterpillar, prepupal, and pupal stages, and the period from caterpillar-adult, respectively, with a total viability of 84.8%. The larval stage had five instars and the consumption of leaf area was 214.3 cm², with the consumption of the two last instars representing 96.9% of the total. Based on this value, the control level of the pest was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hesperiidae; Leaf consumption; Soybean pests; Control level; Bean leaf roller.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000400006
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Evaluation of pyrethroids toxicity in a laboratory strain and a fi eld population of Rachiplusia nu (Lepidoptera: Noctuidae) using two bioassay techniques 99
Russo,Romina; Gamundi,Juan C.; Alzogaray,Raúl A..
Soybean is the most important crop in Argentina and Rachiplusia nu (Gueneé) (Lepidoptera: Noctuidae) is one of its main pests. In this study, the toxicity of five pyrethroids applied topically and by exposure to films on filter paper was evaluated on third instar larvae from a laboratory strain and a field population of R. nu. Four cyanopyrethroids and one non-cyanopyrethroid (permethrin) were tested. All cyanopyrethroids showed the same order of increasing toxicity, regardless of the form of application and origin of the larvae: cypermethrin < ?-cyhalothrin < deltamethrin < ß-cyfluthrin. Knock down Dose 50% and Knock down Time 50% values increased as a function of the solubility of cyanopyrethroids in water. Permethrin showed a different...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soybean looper; Soybean pests; Insecticide resistance.
Ano: 2012 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0373-56802012000100011
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First record of Ophiocordyceps dipterigena (Ascomycota: Hypocreales: Ophiocordycipitaceae) infecting adults of Melanagromyza sojae (Diptera: Agromyzidae) in Brazil 65
Salgado-Neto,Geraldo; Sanz-Veiga,Priscila Andre; Vaz,Marcos André Braz.
ABSTRACT: This note is the first report on the infection of adult stage of Melanagromyza sojae Zehntner, 1900 (Diptera: Agromyzidae) by the entomopathogenic fungus Ophiocordyceps dipterigena (Hypocreales: Ophiocordycipitaceae) (Berk. & Broome) G. H. Sung, J.M. Sung, Hywel-Jones & Spatafora, in subtropical Brazil. Entomopathogenic fungi, which attack dipteran insects, are of great scientific and economic importance mainly due to their potential as biological control agents of insect pests. Our findings bring new perspectives on the geographical distribution and host range of Ophiocordyceps dipterigena. We emphasize the need of further studies and research on new biological control agents of agricultural pests such as the soybean stem miner fly.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biological control; Entomopathogenic fungi; Natural infection; Stem miner fly; Soybean pests.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000700152
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HAIRY FLEABANE AS A SOURCE OF MAJOR INSECT PESTS OF SOYBEAN 87
DALAZEN,G.; CURIOLETTI,L.E.; CAGLIARI,D.; STACKE,R.F.; GUEDES,J.V.C..
ABSTRACT Weeds compete with crops for essential inputs, but they are also important hosts for pests, both during the crop and between crops. Hairy fleabane (Conyza bonariensis) is an important weed growing in both summer and winter crops. The aim of this study was to evaluate the occurrence and population fluctuations of soybean pests using hairy fleabane as an alternative host. Samples of hairy fleabane plants were collected fortnightly over twelve months at two sites (Boa Vista do Incra and São Vicente do Sul) in Rio Grande do Sul state, Brazil. The results showed that hairy fleabane plants provided shelter to important soybean pests, including the pentatomid stink bugs Edessa meditabunda, Piezodorus guildinii, Dichelop sp. and Euschistus heros,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soybean pests; Integrated pest management; Weeds; Conyza bonariensis.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000300403
Registros recuperados: 5
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