1,720,991 research outputs found
Ciclo di crescita di piccoli frutti e fragola: analisi dei modelli di curve di maturazione e loro applicazioni pratiche
Full text linkEfficacy of 3 neonicotinoid insecticides for the control of the green leafhopper Asymmetrasca (Empoasca) decedens Paoli, a new pest on cultivated red raspberry in Trentino, Italy
No full textPreliminary modelling of maturation curves of strawberry cv Elsanta and Darselect in soilless programmed conditions
Full text linkSoilless programmed conditions for strawberry need high efficiency and high capability to forecast the productions. Modelling the maturation curves is of great help to the growers and to the organizations as well. A preliminary set up of the curves related to strawberry cv Elsanta was started in 2007 using different modified mathematical models present in the literature applied to strawberry and also to different fruit trees. The cultivar Elsanta has been tested for several types of programmed plants, for plants from different sources and growing in different environmental conditions. Plants were previously monitored in the nurseries and subsequently evaluated in forced conditions. The work was aimed to build up indicative fruit growth curves of different genotypes that could mirror and define the correlation between growth accumulation factors (GDH, CH, GD, DD) and the harvest time. The most suitable simulation models were tested and the results functional to forecasting both the time of harvest and the quantity are here presented
Seeds pre-treatment effects on the germination potential of Vaccinium corymbosum L. and interspecific hybrid genotypes
No full textStratification, hormones imbibition and scarification effects of the germination potential of Vaccinium corymbosum L. and interspecific hybrid genotypes
No full textProduction cycle forecasts of the strawberry cv Elsanta by means of maturation curves and environmental control factors
Full text linkThe climatic impact during the growing season is a key factor to forecasting the
production quantities of the farms and growers organizations in particular.
Furthermore, yield predictions are rather critical for crops that are highly characterized by limited shelf life performance like strawberry and soft fruit.
The number of variables that triggers the strawberry production are related and
depending not only to the primary paedoclimatic influence, but also to the plant environment and genotype interaction, that determine considerable changes of the
production factors levels like total yield, fruit size and grade characteristics and
significant implications when weekly forecasts are necessary to market the right
quantity of fruit. Weekly prediction yield are built from up-to-data cadastre farm and land information, production potential of the plants and maturation curves made up from
mathematical models and correlations with historical climatic and harvest data. Reliable elaboration is made through a software linked both to the automatic
meteorological stations and to the management program that updates the records. The output is weekly production multilevel forecasts that are continuously compared with
the real production weights. Predicting strawberry yields in soilless conditions for the cv Elsanta allows an efficient elaboration useful to give primary management tools to the market on the
long and short time
The Circadian Clock in Lepidoptera
Full text linkWith approximately 160,000 identified species of butterflies and moths, Lepidoptera are among the most species-rich and diverse insect orders. Lepidopteran insects have fundamental ecosystem functions as pollinators and valuable food sources for countless animals. Furthermore, Lepidoptera have a significant impact on the economy and global food security because many species in their larval stage are harmful pests of staple food crops. Moreover, domesticated species such as the silkworm Bombyx mori produce silk and silk byproducts that are utilized by the luxury textile, biomedical, and cosmetics sectors. Several Lepidoptera have been fundamental as model organisms for basic biological research, from formal genetics to evolutionary studies. Regarding chronobiology, in the 1970s, Truman’s seminal transplantation experiments on different lepidopteran species were the first to show that the circadian clock resides in the brain. With the implementation of molecular genetics, subsequent studies identified key differences in core components of the molecular circadian clock of Lepidoptera compared to the dipteran Drosophila melanogaster, the dominant insect species in chronobiological research. More recently, studies on the butterfly Danaus plexippus have been fundamental in characterizing the interplay between the circadian clock and navigation during the seasonal migration of this species. Moreover, the advent of Next Generation Omic technologies has resulted in the production of many publicly available datasets regarding circadian clocks in pest and beneficial Lepidoptera. This review presents an updated overview of the molecular and anatomical organization of the circadian clock in Lepidoptera. We report different behavioral circadian rhythms currently identified, focusing on the importance of the circadian clock in controlling developmental, mating and migration phenotypes. We then describe the ecological importance of circadian clocks detailing the complex interplay between the feeding behavior of these organisms and plants. Finally, we discuss how the characterization of these features could be useful in both pest control, and in optimizing rearing of beneficial Lepidoptera
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