6 documents found, page 1 of 1
SPRAY DRIFT AND PEST CONTROL FROM AERIAL APPLICATIONS ON SOYBEANS
Cunha,João P. A. R. da; Barizon,Robson R. M.; Ferracini,Vera L.; Assalin,Marcia R.; Antuniassi,Ulisses R.ABSTRACT Pesticide drift is an issue in modern farming, mainly for crops under constant spraying as soybeans. This study aimed at assessing drift and pest control for aerial applications in soybean crops. Hydraulic nozzles and rotary atomizers, regulated to a wide spectrum of droplet sizes, sprayed thiamethoxam plus lambda-cyhalothrin using an agricultural aircraft Ipanema 202A at volume rate of 20 L ha−1. Trea...
SPRAY DRIFT AND CATERPILLAR AND STINK BUG CONTROL FROM AERIAL APPLICATIONS WITH...
Cunha,João P. A. R. Da; Barizon,Robson R. M.; Ferracini,Vera L.; Assalin,Marcia R.ABSTRACT: The use of aerial application with electrostatic charge is an alternative to improve the quality of insecticide applications in soybean crop. The objective of this study was to evaluate the drift and chemical control of the caterpillar and stink bug complex promoted by aerial applications of insecticide in the soybean crop, using electrostatic spray system and rotary atomizers. The insecticide Thiamet...
Determination of Moxidectin in Serum by Liquid Chromatography-Tandem Mass Spect...
Baptista,Rafaela C.; Fernandes,Maria A. M.; Gilaverte,Susana; Queiroz,Sonia C. N.; Assalin,Marcia R.; Ferracini,Vera L.; Monteiro,Alda L. G.The widespread use of moxidectin (MOX), a parasiticide used in the sheep breeding, has induced the parasite resistance in Brazilian farms. As a consequence, the farmers often increase the dose and frequency of drug utilization, and disregards safety of meat or milk. In order to establish adequate therapeutic treatment it is necessary to know the pharmacokinetics of the drug in the animal's body. Thus, high perf...
Validação de método multirresíduo para determinação de pesticidas em alimentos ...
Queiroz,Sonia C. N.; Ferracini,Vera L.; Rosa,Maria A.This paper presents a practical and rapid method which was validated for simultaneous quantification and confirmation of 29 pesticides in fruits and vegetables using ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS). The samples were extracted following the method known as QuEChERS. Using the developed chromatographic conditions, the pesticides can be separated in less than 9 min. Tw...
Comportamento do herbicida hexazinone em área de recarga do aqüífero Guarani cu...
Queiroz,Sonia C. N.; Ferracini,Vera L.; Gomes,Marco A. F.; Rosa,Maria A.São Paulo state (Brazil) has an important area of sugarcane production, mainly for obtaining alcohol and sugar, where there is an intensive use of pesticides. An important recharge zone of Guarani aquifer, with supplies water for the local population, is located at Ribeirão Preto city, so the local behavior of pesticides must be investigated. The GUS index was obtained by using the paramenters Koc and half-life...
Método para a determinação de hexazinone e tebutiuron em água
Ferracini,Vera L.; Queiroz,Sonia C. N.; Gomes,Marco A. F.; Santos,Gustavo L.This work presents an alternative method for determination of the herbicides tebuthiuron and hexazinone in ground water. The extraction was made with dichloromethane and the analyses by high performance liquid chromatography (HPLC), using reversed-phase column, C-18, mobile phase methanol/water 50:50, v/v, detection and quantification at 247 nm. The following validation parameters were obtained: limit of detect...