Data/hora: 17/06/2024 01:25:42

Provedor de dados: | 92
País: | Brazil
Título: | Combination of diatomaceous earth and powder deltamethrin for insect control in stored corn
Autores: | Ceruti,Fabiane Cristina; Lazzari,Sonia Maria Noemberg.
Data: | 2005-12-01
Ano: | 2005
Palavras-chave: | Grain storage; Inert dust; Insecticide; Sitophilus zeamais.
Resumo: | The use of diatomaceous earth (DE) is a very efficient insect control measure in stored grain IPM due to its low cost, easy application, reduction of active ingredient residues, lower environmental contamination and operator safety. The objective of this research was to evaluate the efficacy of different dosages of DE mixed with powder deltamethrin for controlling Sitophilus zeamais in stored corn. Samples of 100 g of clean and dry corn, in three replicates, were submitted to the following treatments: DE (Keepdry®), at the dosages of 500, 750 and 1000 g/t; powder deltamethrin (K-Obiol®) at 0,5 g a.i. /t and 1,0 g a.i. /t; and combinations of the lowest and highest DE dosages with the two dosages of deltamethrin. Thirty adults of S. zeamais were placed in each vial with the treated grains and kept in environment chambers at 25ºC. Mortality was evaluated from the 1st to the 28th day. In the treatments mixing DE with deltamethrin or deltamethrin alone, the mortalyti was registered since the first day. In the treatments using only DE, the first dead insects were recorded after the 3rd day, especially in the highest dosages. After the 7th day, however, there was no statistical difference among all treatments, except for the lowest dosage of DE which reached a satisfactory control level only by the 14th day. It was concluded that treatments using DE combined with low dosages of powder deltamethrin represent an efficient control measure against S. zeamais in stored corn because insect mortality is faster than in treatments using DE alone and residues of active ingredients are much lower than using the insecticide in high dosages.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262005000400020
Editor: | Sociedade Brasileira De Entomologia
Relação: | 10.1590/S0085-56262005000400020
Formato: | text/html
Fonte: | Revista Brasileira de Entomologia  v.49 n.4 2005
Fonte: | info:eu-repo/semantics/openAccess