Search results for "PEST"
showing 10 items of 1124 documents
Changes in eggshell ultrastructure of Falco naumanni and Tyto alba exposed to pesticides and polychlorinated biphenyls (PCBs)
2014
Changes in the quality of eggs of birds exposed to environmental contaminants have been described, but few reports concern eggshell ultrastructure. In this study, infertile or addled Lesser Kestrels (Falco naumanni) and Barn owls (Tyto alba) eggs were collected from the polluted area of Gela plain (Sicily) during 2007, and compared in terms of organophosphate and organochlorine pesticides, and PCBs levels, and eggshell ultrastructure as determined by scanning electron microscopy. Pesticide and PCB residues in eggs were determined by Gas chromatography/ mass spectrometry (GC/MS) [GC Agilent 7890A/MS Agilent 5975C (Agilent technologies) using a DB-5 capillary column in the selected ion monito…
Reducing postharvest decay in cactus pears by dip treatment with imazalil or azoxystrobin
2019
Postharvest decay in cactus pear is a minor problem in fruit marketed directly after harvest, while it may represent a major cause of losses when fruit are cold stored or subjected to cold quarantine treatments. Unfortunately, to date, no postharvest fungicide has been registered to control postharvest decay of cactus pears. Thus, the objective of this study was to evaluate the efficacy of two globally known fungicides, imazalil (IMZ) and azoxystrobin (AZO), registered for postharvest treatment of various fresh produce species, to control decay on cactus pears. Second-crop cactus pears ‘Gialla’ fruits were dipped in 500 mg L(‑1) IMZ or AZO and stored at 1 or 8°C and 90-95% RH for 2 or 3 wee…
Livelli biologici di inquinanti organici persistenti in un campione di popolazione generale di Calatafimi-Segesta (TP): risultati preliminari dello s…
2011
Ārējā vide kā iespējas un sarežģījumi biotehnoloģiju uzņēmumiem.
2022
Bakalaura darba ietvaros tiek pētīta modernā, daudzsološā biotehnoloģiju nozare un to ietekmējošie ārējās vides faktori. Lai noteiktu, kur ārējās vides faktori atstāj lielāko ietekmi uz šo nozari, tiek salīdzinātu dažādu valstu rādītāji un šajās valstīs esošo biotehnoloģiju uzņēmumu sniegums. Ar PESTLE analīze palīdzību tika padziļināti pētīti ārējās vides faktori Latvijā. Tika izstrādātas rekomendācijas šīs nozares, kuras produkcijai raksturīga augsta pievienotā vērtība, attīstības veicināšanai Latvijā. Darba gaitā tika/netika atrastas pozitīvas sakarības starp (faktors un rādītājs), kā arī kavējoši faktori. Darbs sastāv no 69 lapām, satur teorētisko, objekta izpētes un analītisko daļu. Kā…
Photo-Induced Luminescence
2008
The present paper is a critical review dealing with the characteristics, reaction mechanisms and photoproducts, instrumentation and analytical applications of the photo-induced either chemiluminescence or fluorescence. Special attention is paid to the determination of pesticides by continuous-flow methodologies. The paper is divided into several sections covering the most relevant published papers.
Determination of 40 currently used pesticides in airborne particulate matter (PM 10) by microwave-assisted extraction and gas chromatography coupled …
2011
A confirmatory and sensitive procedure has been developed for the determination of 40 currently used pesticides (Cups) in airborne particulate matter (PM 10) at trace level. The proposed method includes extraction of PM 10-bound pesticides by microwave-assisted extraction (MAE) followed by a gel permeation chromatography (GPC) clean-up and determination by GC-MS/MS. The injection mode and the main parameters in MS/MS were optimized. The matrix effect was also evaluated. Recoveries ranged from 70 to 120% except for pyrimethanil and pirimicarb. The limit of quantification (LOQ) ranged from 1.32 to 39.47 pg m(-3), when air volumes of 760 m(3) were collected. The method was applied to 38 sample…
Build up of patches caused by Rhizoctonia solani
2010
Rhizoctonia solani is a complex species that is composed of different anastomosis groups (AG). Although these different AGs show differences in their host ranges, generally R. solani is a phytopathogenic species with a wide spectrum of hosts. It has the ability to grow as a saprotroph, which further complicates its behaviour as a parasite. The losses caused by R. solani are very important and need a sustainable management strategy. The patchy appearance of the disease caused by this pathogen is well-known. The patches show within and between season dynamics. The factors which affect the spread of the disease can be grouped into three main categories: host plant, pathogen and environment. Ho…
An in vitro procedure for evaluation of early stage oxidative stress in an established fish cell line applied to investigation of PHAH and pesticide …
2004
Oxidative stress by increased production of reactive oxygen species such as superoxide has been implicated in the toxicity of PCB's and non-target toxicity of many pesticides. We report the development of a microplate-based method for determination of early stage oxidative stress using an established cell line (EPC) from a skin tumour of carp Cyprinus carpio L. and 2',7'-dichlorodihydrofluorescein diacetate (H(2)-DCFDA) as a fluorescent probe for detection of reactive oxygen species (ROS) formation. Sublethal concentrations of the herbicide Paraquat, an established redox cycling agent and a crude PCB mixture, Arochlor 1254 elicited a linear increase in ROS formation over 2 h exposure which …
First record of Pachycrepoideus vindemmiae (Rondani) (Hymenoptera: Pteromalidae) parasitizing pupae of Ceratitis capitata (Wiedemann) (Diptera: Tephr…
2015
The Mediterranean fruit fly (Medfly), Ceratitis capitata (Wiedemann) (Diptera : Tephritidae), isone of the most devastating pests of fruits and vegetables worldwide (Liquido et al. 1991; Chueca et al. 2007). It is the most invasive species of all members of the Tephritidae (Zucchi 2001) and a key pest of citrus and other fruits in the Mediterranean countries, including Tunisia (Enkerlin & Mumford 1997; Jerraya 2003). Serious economic damage is caused by this insect in Tunisia; in mixed fruit cultivation crop losses can be from 80 to 100% (Jerraya 2003). Citrus is the most affected host crop, with direct annual losses attributed to C. capitata of up to 38% of annual income from Tunisian citr…
Little Egret Egretta garzetta (Linnaeus, 1766) ( Pelecaniformes Ardeidae) and Eurasian crag martin Ptyonoprogne rupestris (Scopoli, 1769) (Passerifor…
2021
For the first time, the nesting of Eurasian crag martin Ptyonoprogne rupestris (Scopoli, 1769) (Passeriformes Hirundinidae) and Little egret Egretta garzetta (Linnaeus, 1766) (Pelecaniformes Ardeidae) in the Aegadian Islands (W-Sicily, Italy) is reported. Of particular interest is the nesting of the Little egret on the island of Maraone resulting in the first report for Sicily of a heronry on a marine island. Although this nesting environment has already been established in Sardinia, it should be emphasized that until now the establishment of a heronry has never been detected on an islet so far from the mainland.