residual action
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2021 ◽  
Vol 25 (5) ◽  
pp. 87-875
Author(s):  
L.O. Akhideno ◽  
A.S. Yusuf ◽  
V.R. Bak-Polor ◽  
J. Isibor ◽  
N.N. Akemien ◽  
...  

Piper guineense commonly called Usira in Edo, Uziza in Igbo and IgherelIyere in Yoruba belongs to the family piperaceae. The efficiency of its seed powder in the control of callosobruschus maculatus (beans weevil) was investigated in the Science Laboratory Department of Federal Polytechnic, Auchi, Edo State Nigeria. The seed powder was applied at the rate of O control, 15, 25, 50 and 100 (gkg-1). The result obtained shows that piper guineense seed powder at 25gkg-1 to 100gkg-1 were effective in the control of callosobrusus maculatus at 0.01% level of significance. It was revealed that a very strong insecticidal action of I. piper guineense on beans weevil. However, the efficiency of this insecticidal action on callosobruschus maculatus with increasing concentration of the plant material seed powder with 100gkg-1 giving the highest mortality rate, residual action and egg plugs of the weevils. This finding is critical to resource poor farmers in developing countries who will find this trial practicable and affordable. colourkasi hustlers.


2020 ◽  
Vol 46 (2) ◽  
pp. e7612
Author(s):  
Javier Alberto Vásquez-Castro ◽  
Gilberto Casadei De Baptista ◽  
Casimiro Dias Gadanha Jr. ◽  
Julio Cesar Bracho-Pérez

Insecticides resistance can significantly compromise the control programs of Rhyzopertha dominica (Coleoptera: Bostrichidae), one of the main wheat pests in warehouses. The objectives of this work were to study the occurrence of resistance to fenitrothion and esfenvalerate in two Brazilian populations of R. dominica from Santa Rosa (SR lineage) and Campo Grande (CG lineage), as well as the insecticidal effect and residual action of these insecticides when used alone or as a mixture in stored wheat. The application system was calibrated to provide grain treatment at theoretical concentrations of 10 and/or 0.5 mg kg-1 fenitrothion and esfenvalerate, respectively. By comparing the fitted mortality curves for lineages within insecticides, as well as insecticides within lineages significant differences were observed in all cases. Esfenvalerate was ineffective in controlling R. dominica. The SR lineage of R. dominica was more resistant to the insecticides tested than the CG lineage. The number of individuals in the F1 offspring of R. dominica was dependent on the lineage, insecticide, and on the time after the application of insecticide. In the untreated grains (control), the CG lineage had a greater number of progeny than the SR lineage, while the opposite was verified in the grains treated. Fenitrothion and esfenvalerate are not useful for the control of R. dominica. Factors influencing control of R. dominica are discussed in this work.


Ecotoxicology ◽  
2020 ◽  
Author(s):  
Rafael Antonio Pasini ◽  
Matheus Rakes ◽  
Rodolfo Vargas Castilhos ◽  
Franciele Silva de Armas ◽  
Juliano de Bastos Pazini ◽  
...  

Revista CERES ◽  
2012 ◽  
Vol 59 (6) ◽  
pp. 859-866 ◽  
Author(s):  
Fábio Régis de Souza ◽  
Edgard Jardim Rosa Junior ◽  
Carlos Ricardo Fietz ◽  
Douglas Martins Pereira Pellin ◽  
Anderson Cristian Bergamin ◽  
...  

Morphological characterization and aggregate stability is an important factor in evaluating management systems. The aim of this paper is to evaluate the stability and morphology of the aggregates of a dystrophic Oxisol managed with no-tillage and conventional tillage with and without the residual action of gypsum. The experimental design was randomized blocks arranged in split-split plot, where the treatments were two soil management systems (plots) with 0 and 2000 kg ha-1 of gypsum (subplots) and five depths (0-0.05, 0.05-0.10, 0.10-0.15, 0.15-0.20 and 0.20-0.30 m) as the subsubplots, with four replications. The aggregate morphology was determined through images and later evaluated by the Quantporo software. Stability was determined by the wet method. The results showed that the no-tillage system, with or without gypsum residual effect, provided the aggregates with the largest geometric diameters. The combination of no-tillage system and the gypsum residual effect provided rougher aggregates.


ISRN Agronomy ◽  
2012 ◽  
Vol 2012 ◽  
pp. 1-11 ◽  
Author(s):  
J. A. Vásquez-Castro ◽  
G. C. de Baptista ◽  
C. D. Gadanha ◽  
L. R. P. Trevizan

Among the pests that attack stored maize and wheat grain, Sitophilus oryzae (L.) and S. zeamais Motsch (Coleoptera: Curculionidae) are the most destructive. This paper is aimed at the study of the insecticidal effect and the residual action of organophosphate fenitrothion, pyrethroid esfenvalerate, and the mixture of both on S. oryzae and S. zeamais in stored maize and wheat. Grains were treated in order to obtain theoretical concentrations of 10 and/or 0.5 mg·kg−1 fenitrothion and esfenvalerate, respectively. The effectiveness experiments were installed as of 15, and 30 days, and subsequently at monthly intervals as of 12 months after grain treatment, or until mortality ceased in the plots. After mortality evaluation happened all individuals were eliminated, either dead or alive, and grains were kept for 60 days to assess the number of emerged progeny. The comparison of mortality curves of the pest species within each combination of grain type and insecticide showed significant differences. In general, the mortality of S. oryzae decreased faster than that of S. zeamais considering the grain type-insecticide combination. Esfenvalerate was ineffective in all combinations. Higher mortality of both species was observed on wheat grains treated with fenitrothion and fenitrothion + esfenvalerate mixture. Best results as to progeny control were obtained with fenitrothion and fenitrothion + esfenvalerate mixture. The factors that influenced the pest control are discussed in the present work.


2003 ◽  
Vol 27 (4) ◽  
pp. 835-839 ◽  
Author(s):  
Denilson Bezerra Costa ◽  
Brígida Souza ◽  
Geraldo Andrade Carvalho ◽  
César Freire Carvalho

ABSTRACT - This work was designed to evaluate the residual action of the insecticides trichlorfon, triflumuron, endosulfan, fenpropathrin, chlorpirifos, tebufenozide and esfenvalerate, sprayed on cotton plants, to second-instar larvae of Chrysoperla externa (Hagen, 1861), under greenhouse conditions. The experimental design was completely randomized with ten replicates. Three larvae were released on each plant, in the 1st, 12th and 23rd day after pesticides spray. Tebufenozide and esfenvalerate were little persistent (class one), while trichlorfon, triflumuron and endosulfan were slightly persistent, decreasing the survival of C. externa larvae over 30%, up to 14 days after spray. Fenpropathrin and chlorpirifos caused mortality over 30%, up to 25 days after spray, being classified as fairly persistent.


1991 ◽  
Vol 24 (2) ◽  
pp. 115-116
Author(s):  
R. Penna ◽  
A.E.X. Oliveira ◽  
M.F.N. Ferreira ◽  
C. Johnson ◽  
A. Bosworth ◽  
...  

In controlled humidity chambers in the laboratory differences in the absorption velocity of BHC were observed depending on the substrate sprayed. While BHC is no longer used in Chagas' disease control this data could have relevance to spraying houses in a controlprogramme with other insecticides.


1985 ◽  
Vol 80 (4) ◽  
pp. 443-445 ◽  
Author(s):  
R. Penna ◽  
A. E. X. Oliveira ◽  
M. F. N. Ferreira ◽  
C. Johnson ◽  
A. Bosworth ◽  
...  

Residual insecticide activity of BHC vapors from various building materials in controlled humidity chambers in the laboratory were significantly different. Laboratory-reared, first instar nymphs of Dipetalogaster maximus were exposed to vapors of BHC which were being released from the treated surfaces of building materials taken from Mambaí, Goiás.


1979 ◽  
Vol 19 (4) ◽  
pp. 268-269 ◽  
Author(s):  
Anni Steentoft

Dieldrin was developed in the United States and was made available commercially in 1948. Chemically, dieldrin is 1, 2, 3, 4, 10, 10-hexachloro-6, 7-epoxy-1, 4, 4a, 5, 6, 7, 8, 8a-octahydro-1, 4, 5, 8-dimethanonaphthalene and forms, together with aldrin and endrin, a triumvirate of insecticides derived from hexachlorodicyclopentadiene. High insecticidal activity combined with long residual action makes dieldrin an effective insecticide. Dieldrin is absorbed through the gastrointestinal tract, the respiratory tract and the skin. Several cases of chronic or acute non-fatal dieldrin poisoning have been reported, but only a very small number of fatal dieldrin cases with only fragmentary toxicological data have been described. This paper concerns a fatal intoxication due to dieldrin, including toxicological findings in blood, liver and muscle.


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