Search results for "Trap"
showing 10 items of 2144 documents
Existence of a traveling wave solution in a free interface problem with fractional order kinetics
2021
Abstract In this paper we consider a system of two reaction-diffusion equations that models diffusional-thermal combustion with stepwise ignition-temperature kinetics and fractional reaction order 0 α 1 . We turn the free interface problem into a scalar free boundary problem coupled with an integral equation. The main intermediary step is to reduce the scalar problem to the study of a non-Lipschitz vector field in dimension 2. The latter is treated by qualitative topological methods based on the Poincare-Bendixson Theorem. The phase portrait is determined and the existence of a stable manifold at the origin is proved. A significant result is that the settling time to reach the origin is fin…
L’AMPIA VALENZA ECOLOGICA DELLA CV CERASUOLA DI Olea europaea L.E LO STANDARD QUALITATIVO DEL SUO OLIO EXTRAVERGINE
2012
Citrus biotechnology
2020
Agricultural crops that can better withstand the changing climatic and pathogen landscape have been produced through natural selection throughout the millennia and, in recent years, through the process of human-assisted plant breeding and selection. However, a lack of genetic diversity in many commercially cultivated crops (due to monoculture) has made them more vulnerable to biotic and abiotic stresses (Esquinas-Alcazar, 2005; Keneni et al., 2012). Citrus, belonging to the Rutaceae family, is one of the most important commercial woody fruit crops in the tropical and subtropical areas of the world. The origin of citrus is traced back to parts of tropical and subtropical Southeast Asia (Wu e…
Confronto tra un sistema laser e due sistemi GPS per il trapianto meccanizzato di barbatelle
2001
The transplanters of grafted vines at present on the market are equipped with laser transmitters and receivers, which ensure the parallelism among the vineyard rows. These high cost instruments cause some operational problems: not operational return way of the machine, the need for more than one surveyed point when the soil shape is irregularar, the need of two operators, besides the machine driver, etc. The aim of this work is to assess the accuracy of GPS systems in order to use them in place of the laser systems. The distances among the grafted vines and the distances among the vineyard rows were measured using two positioning systems (a differentially corrected GPS system - DGPS) and a …
Indagini sulla presenza di apoidei in aree marginali di agroecosistemi in Sicilia occidentale (Insecta Hymenoptera Apoidea)
2002
Eficacia di alcuni insetticidi su Phyllocnistis citrella Stainton (Lep.: Gracillariidae) ed effetti collaterali sui suoi antagonisti naturali.
1997
Indagine su Raphidopalpa foveicollis (Lucas) nella coltura del melone biologico della Sicilia occidentale.
2012
Investigations on Raphidopalpa foveicollis (Lucas) in an organic cultivation of winter melon in western Sicily Red pumpkin beetle (Raphidopalpa foveicollis), is a Chrysomelidae beetle that lives on various species of cucurbits with greater preference for Cucumis sp. Both larval and adult stages are injurious to the crops. The former feeds on roots and stems of the plants, while the latter feeds on foliage, petals and fruits. In Sicily, this insect has occurred in the past as a secondary pest on the winter melon, but sometimes it reaches levels of infestation to arouse considerable concern among farmers. In order to implement economic methods of pest control a study on organic cultivation of…
Indagine su Henosepilachna elaterii (Rossi) (=Epilachna chrysomelina (F.)) e Raphidopalpa foveicollis (Lucas) in meloneti biologici della Sicilia occ…
2011
Investigations on Henosepilachna elaterii (Rossi) and Raphidopalpa foveicollis (Lucas) in an organic cultivation of winter melon in western Sicily. A study on H. elaterii and R. Foveicollis, serious pests of winter melon, was conducted in two organic melon fields of the western Sicily. Dynamics of population and infestation levels were investigated. In addition, the possible influence of mulching on R. Foveicollis infestation has been taken into account. Our results showed that H. elaterii occurred only in one field from the beginning of June and it infested 60% of the plants in the mid-July, then the pest population density dropped to about 10%. R. foveicollis occurred in both locations fr…