scholarly journals Growth Characteristics of Commercial Bumblebee Colonies in Open Field Conditions May Be Evidence for Their Invasion Potential

2021 ◽  
Vol 13 (1) ◽  
pp. 5-8
Author(s):  
Ayhan Gosterit ◽  
Cengiz Erkan
Keyword(s):  
Open Field ◽  
Growth Characteristics ◽  
Field Conditions ◽  
Invasion Potential

The ability of CROPGRO-Tomato model to simulate the growth characteristics of Thomas F1 tomato cultivar grown under open field conditions

2021 ◽  
pp. 1-15
Author(s):  
N. Muntean ◽  
R. A. Chawdhery ◽  
V. Potopová ◽  
L. Tűrkott
Keyword(s):  
Open Field ◽  
Growing Season ◽  
Growth Characteristics ◽  
Field Conditions ◽  
Weather Data ◽  
Soil Conditions ◽  
Tomato Cultivar ◽  
Area Index ◽  
Climate Conditions ◽  
The Impact

Abstract There are few studies about the ability of CROPGRO-Tomato model to simulate tomato growth under field conditions as a function of both local weather and soil conditions. The aim of this work was to calibrate the CROPGRO-Tomato model, included in the Decision Support System for Agrotechnology Transfer (DSSAT) software, for the Thomas F1 indeterminate tomato cultivar grown under open field conditions at two locations in the Czech Republic with different soil and climate conditions. Additionally, this paper focuses on modelling the impact of compound weather events (CEs) on the growth characteristics of the hybrid field tomato variety. The genotype file, including the main parameters of crop phenology and plant growth, was adapted to the Thomas F1 indeterminate tomato cultivar. The CROPGRO-Tomato model was calibrated by inputting the soil characteristics, weather data and crop management data and then by adjusting the genetic coefficients to simulate the observed Leaf Area Index (LAI) and Above Ground Biomass (AGB) from transplanting to harvest under the farmers' field conditions. The comparison of the LAI simulated by the model and measured under field conditions showed adequate representation with the root mean square error of 0.86 and 1.11 m2/m2. Although there was a good fit for LAI and AGB between the simulated and measured data during the first part of the growing season, increasing differences were found in the growing season with cool-wet and/or hot-dry thresholds of CEs.

scholarly journals Application of Bio-Friendly Formulations of Chitinase-Producing Streptomyces cellulosae Actino 48 for Controlling Peanut Soil-Borne Diseases Caused by Sclerotium rolfsii

2021 ◽  
Vol 7 (3) ◽  
pp. 167
Author(s):  
Gaber Abo-Zaid ◽  
Ahmed Abdelkhalek ◽  
Saleh Matar ◽  
Mai Darwish ◽  
Muhammad Abdel-Gayed
Keyword(s):  
Open Field ◽  
Biocontrol Agent ◽  
Sclerotium Rolfsii ◽  
Dry Weight ◽  
Culture Broth ◽  
Field Conditions ◽  
Damping Off ◽  
Mycelium Growth ◽  
Particle Size Analyzer ◽  
Cell Pellet

Of ten actinobacterial isolates, Streptomyces cellulosae Actino 48 exhibited the strongest suppression of Sclerotium rolfsii mycelium growth and the highest chitinase enzyme production (49.2 U L−1 min−1). The interaction between Actino 48 and S. rolfsii was studied by scanning electron microscope (SEM), which revealed many abnormalities, malformations, and injuries of the hypha, with large loss of S. rolfsii mycelia density and mass. Three talc-based formulations with culture broth, cell-free supernatant, and cell pellet suspension of chitinase-producing Actino 48 were characterized using SEM, Fourier transform infrared spectroscopy (FTIR), and a particle size analyzer. All formulations were evaluated as biocontrol agents for reducing damping-off, root rot, and pods rot diseases of peanut caused by S. rolfsii under greenhouse and open-field conditions. The talc-based culture broth formulation was the most effective soil treatment, which decreased the percentage of peanut diseases under greenhouse and open-field conditions during two successive seasons. The culture broth formulation showed the highest increase in the dry weight of peanut shoots, root systems, and yielded pods. The transcriptional levels of three defense-related genes (PR-1, PR-3, and POD) were elevated in the culture broth formulation treatment compared with other formulations. Subsequently, the bio-friendly talc-based culture broth formulation of chitinase-producing Actino 48 could potentially be used as a biocontrol agent for controlling peanut soil-borne diseases caused by S. rolfsii.

scholarly journals Chrysodeixis chalcites nucleopolyhedrovirus (ChchNPV): Natural occurrence and efficacy as a biological insecticide on young banana plants in greenhouse and open-field conditions on the Canary Islands

PLoS ONE ◽  
2017 ◽  
Vol 12 (7) ◽  
pp. e0181384 ◽  
Author(s):  
Ernesto Gabriel Fuentes ◽  
Estrella Hernández-Suárez ◽  
Oihane Simón ◽  
Trevor Williams ◽  
Primitivo Caballero
Keyword(s):  
Open Field ◽  
Canary Islands ◽  
Field Conditions ◽  
Natural Occurrence ◽  
Biological Insecticide ◽  
Chrysodeixis Chalcites

scholarly journals Effect of different irrigation and fertilizer levels on growth, yield and cost economics of papaya (Carica papaya L.) cv. red lady under open field conditions

2020 ◽  
Vol 8 (4) ◽  
pp. 2184-2191
Author(s):  
Vinod Godi ◽  
Mahabaleshwar Hegde ◽  
Vidya A ◽  
Thimmegouda MN ◽  
Subbarayappa CT ◽  
...  
Keyword(s):  
Open Field ◽  
Carica Papaya ◽  
Growth Yield ◽  
Field Conditions

Residues, dissipation, and risk assessment of spinosad in cowpea under open field conditions

2015 ◽  
Vol 187 (11) ◽  
Author(s):  
Zhibo Huan ◽  
Jinhui Luo ◽  
Zhi Xu ◽  
Defang Xie
Keyword(s):  
Risk Assessment ◽  
Open Field ◽  
Field Conditions
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