14 documents found, page 1 of 2
Fire ants: What do rural and urban areas show us about occurrence, diversity, a...
Ramalho,Manuela de O.; Menino,Leonardo; Souza,Rodrigo F.; Kayano,Débora Y.; Alves,Juliana M. C.; Harakava,Ricardo; Nagatani,Victor H.Abstract In South America, Solenopsis saevissima and S. invicta are the most common fire ants. Nests are founded in areas under anthropic interference like urban or rural areas, but S. invicta is found preferentially in those with the greatest anthropic interference. However, we do not know the rates at which they exist in anthropized areas next to high density of native vegetation. Areas with 60 to 90% of nati...
Odontadenia lutea (Apocynaceae) LEAVES: PHYTOCHEMICAL STUDY AND INSECTICIDAL AC...
Silva Junior,Weber M. da; Santos,Renato G.; Duarte,Geane K. G. F.; Cunha,Gracielle O. S.; Silva,Daniela M. da; Marchesin,Thais F. R.; Bueno,Odair C.The present work describes the chemical constituents of Odontadenia lutea (Vell.) Markgr. leaves and the toxicities of its extract and fractions against Atta sexdens rubropilosa Forel (Hymenoptera: Formicidae). Chromatographic procedures of the ethanolic extract resulted in the identification of the triterpene β-amyrin, the flavonoid rutin, two fatty acids palmitic and linolenic, and one glyceroglycolipid 3-O-(...
INSECTICIDAL AND FUNGICIDAL ACTIVITY OF A MAGNESIUM COMPOUND CONTAINING ISOVANI...
Silva,Eldevan S.; Marchi,Rafael C.; Matos,Carla Sthefane P.; Silva,Maria Fátima G. F.; Fernandes,João B.; Bueno,Odair C.; Carlos,Rose M.Pesticides offer a simple, cost-effective solution to ensure food supplies for a growing world population. However, their environmental performance needs improvement if pesticides are to continue contributing importantly. This study explores the insecticidal potential of a magnesium (II) metal complex containing 1,10-phenanthroline and isovanillic acid (MgPhenIso) against leaf-cutting ant (Atta sexdens rubropil...
Analysis of the Gene Expression and RNAi-Mediated Knockdown of Chitin Synthase ...
Moreira,Ariele C.; Carneiro,Renato L.; Fracola,Mariana F.; Micocci,Kelli C.; Bueno,Odair C.; Souza,Dulce H. F.Chitin synthase (CHS) is the enzyme specifically associated with chitin synthesis, an important component of diverse organisms including insects. Two alternative spliced transcripts of the CHS gene (AsCHS-A1 and AsCHS-A2) were identified by quantitative reverse-transcription polymerase chain reaction (RT-qPCR) during the development of the leaf-cutting ant Atta sexdens. Expression profiles of AsCHS-A transcript...
Activities of extracts and compounds from Spiranthera odoratissima St. Hil. (Ru...
Terezan,Ana Paula; Rossi,Raquel Andrade; Almeida,Roberta N. A.; Freitas,Taís Garcia; Fernandes,João B.; Silva,M. Fátima das Graças Fernandes daThe study of the Spiranthera odoratissima St. Hil (Rutaceae) branches extracts led to the isolation of the furoquinoline (dictamine, γ-fagarine and skimmianine) and 2-arylquinoli-4-one (1-methyl-2-phenylquinolin-4-one) alkaloids and limonoids (limonexic acid and limonin). The compounds 1-methyl-2-phenylquinolin-4-one and limonexic acid were isolated for the first time from the Spiranthera. These furoquinoline a...
Suscetibilidade de operárias e larvas de abelhas sociais em relação à ricinina
Rother,Débora C.; Souza,Tiago F.; Malaspina,Osmar; Bueno,Odair C.; Silva,Maria de Fátima das G. F. da; Vieira,Paulo C.; Fernandes,João B.Muitas substâncias de origem vegetal podem ser tóxicas ou apresentar potencial inseticida. Com o objetivo de diminuir a problemática da poluição ambiental alguns estudos vêm tentando substituir os inseticidas artificiais pelos inseticidas botânicos. Ricinus communis (Euphorbiaceae) apresenta uma grande variedade de substâncias sendo a ricinina o principal componente tóxico. Considerando que as abelhas são inset...
Leaf-cutting ant faecal fluid and mandibular gland secretion: effects on microf...
Rodrigues,André; Carletti,Carla D.; Bueno,Odair C.; Pagnocca,Fernando C.The mandibular gland secretion (MGS) and the faecal fluid (FF) of the leaf-cutting ant Atta sexdens rubropilosa Forel affected the spore germination of selected microfungi isolated from nests of this insect. MGS was more effective than the FF, completely inhibiting the spore germination of four out of six microfungi species.
Limonoids from andiroba oil and Cedrela fissilis and their insecticidal activity
Ambrozin,Alessandra R. P.; Leite,Ana C.; Bueno,Fabiana C.; Vieira,Paulo C.; Fernandes,João B.; Bueno,Odair C.; Silva,M. Fátima das G. Fernandes daNine limonoids were isolated from Carapa guianensis and Cedrela fissilis. Among them, 1,2-dihydro-3beta-hydroxy-7-deacetoxy-7-oxogedunin is a new compound. Moreover, the assignments of some chemical shifts of xyloccensin k have been corrected and ¹H NMR data of 7-deacetylgedunin have been assigned for the first time. These isolated limonoids were assayed on Atta sexdens rubropilosa workers showing moderate inse...
Inhibition of the symbiotic fungus of leaf-cutting ants by coumarins
Godoy,Marizete F. P.; Victor,Sandra R.; Bellini,Adriana M.; Guerreiro,Gisleine; Rocha,Waldireny C.; Bueno,Odair C.; Hebling,Maria J. A.Leaf-cutting ants are known to be a serious pest for agriculture due to the high amounts of vegetal matter from crops used by them in order to cultivate a symbiotic fungus on which they rely for food and enzymes. The mutualism between the fungus and the ants is a point to be explored when alternative methods of control are being thought of. Considering that some plants are naturally resistant to phytophagous in...
Limonoids from Cipadessa fruticosa and Cedrela fissilis and their insecticidal ...
Leite,Ana C.; Bueno,Fabiana C.; Oliveira,Cintia G.; Fernandes,João B.; Vieira,Paulo C.; Silva,M. Fátima das G. Fernandes da; Bueno,Odair C.The chemical investigation of the fruits of Cipadessa fruticosa (Meliaceae) afforded the new limonoid cipadesin B and the known swietemahonolide. From the roots of Cedrela fissilis (Meliaceae) were isolated the limonoid 3beta-acetoxycarapin, new as natural product, along with the triterpenes oleanolic and oleanonic acid. These compounds and other six mexicanolide limonoids previously isolated from C. fruticosa ...