Diurnal and temporal activity of pronubial insects on berseem flowers in a subtropical environment

2021 ◽  
pp. 1-6
Author(s):  
Sanjay Kumar ◽  
Keerthi M. C. ◽  
Veeresh Kumar ◽  
Tejveer Singh ◽  
Aniruddha Maity ◽  
...  
Keyword(s):  
Subtropical Environment

Estimating mass of temperate and tropical pastures in the subtropics

1993 ◽  
Vol 33 (7) ◽  
pp. 865 ◽  
Author(s):  
WJ Fulkerson ◽  
K Slack
Keyword(s):  
Substantial Reduction ◽  
Ground Level ◽  
Regression Equations ◽  
Tropical Pastures ◽  
Senescent Leaf ◽  
Temperate Pastures ◽  
Second Year ◽  
Single Regression ◽  
Separate Regression ◽  
Subtropical Environment

The feasibility of estimating, with acceptable precision, temperate and tropical pasture mass in a subtropical environment was evaluated. For the tropical grasses kikuyu (Pennisetum clandestinum) and setaria (Setaria ancepts), 3 different pasture meters were calibrated against 1 of 3 dry matter (DM) estimates. Temperate pastures (predominantly Lolium perenne and Trifolium repens) were evaluated using the Ellinbank rising plate meter (RPMl) calibrated against DM to ground level. A single regression equation was developed for syegrass-white clover pasture from data pooled within season over first- and second-year swards. The s.e. of estimate (s.e.e.) for assessing tropical grass pasture mass using RPMl was similar to that for a heavier Ellinbank meter and substantially lower than that for the electronic pasture probe. Using RPMl, separate regression equations were required for early (November-February) and late (March-May) season determinations for both kikuyu and setaria. The regression equations were based on calibrations against shoot DM (>5 cm stubble height for kikuyu and 6 cm for setaria) and are only applicable to well-managed and highly utilised pastures. Calibrations of all pasture meters over all months to green DM (senescent leaf and stem removed) gave a lower s.e.e. than total DM (kikuyu 138 v. 177 kg DM/ha, n = 171; setaria 211 v. 224 kg DM/ha, n = 177) whilst shoot DM gave a more substantial reduction in s.e.e. (kikuyu 95 v. 147 kg DM/ha; setaria 140 v. 193 kg DM/ha).

Fertility and birth weights of goats in a subtropical environment

1964 ◽  
Vol 62 (2) ◽  
pp. 237-244 ◽  
Author(s):  
H. Epstein ◽  
A. Herz
Keyword(s):  
Early Spring ◽  
First Time ◽  
Subtropical Environment

Records of fertility and birth weights were examined in eight breeds of goat, indigenous to, or imported into, the subtropical environment of Israel. These included the local Syrian Mountain, Negev and Damascus breeds, and the imported Malta, Appenzeller, Saanen, Fawn German and Anglo- Nubian.All breeds of goat, local or imported, kidded at the end of winter and in early spring, and all, save the late-maturing Damascus and part of the Anglo- Nubian, kidded for the first time at the age of 1 year.In imported breeds of goat which acclimatized well in the subtropical environment fertility was not impaired.

scholarly journals Assessing the response of maize phenology under elevated temperature scenarios

2012 ◽  
Vol 27 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Nereu Augusto Streck ◽  
Stefanía Dalmolin da Silva ◽  
Josana Andreia Langner
Keyword(s):  
Elevated Temperature ◽  
Air Temperature ◽  
Developmental Cycle ◽  
Emergence Time ◽  
Genotype X Environment ◽  
Sowing Dates ◽  
Maximum Temperatures ◽  
Synthetic Time Series ◽  
Santa Maria ◽  
Subtropical Environment

The objective of this study was to simulate the development of maize in elevated temperature scenarios at Santa Maria, RS, Brazil. The developmental cycle of maize was simulated with the Wang and Engel (WE) model with genotype-dependent coefficients for the cultivar BRS Missões. The developmental cycle was divided into vegetative phase (from emergence to silking), and reproductive phase (from silking to physiological maturity). Twelve sowing dates throughout the year were considered, resulting in emergences on the day 15 of each month all year round. Climate scenarios used were synthetic time series of 100 years of current climate and with increase in mean air temperature of +1, +2, +3, +4, and +5, with symmetric and asymmetric increases in daily minimum and maximum temperatures. As temperature increased, the number of years in which crop was killed by frost decreased, indicating that if global warming will confirm, the growing season for maize grown in subtropical environment will be longer by the end of this century. Maize vegetative and reproductive development was delayed or hastened depending upon the emergence time of the year, and if the increase in air temperature is symmetric or asymmetric, indicating complex Genotype x Environment interactions and high vulnerability of maize development to climate change.

scholarly journals Seed softening patterns of forage legumes in a temperate/subtropical environment in Uruguay

2013 ◽  
Vol 73 (1) ◽  
pp. 41-47 ◽  
Author(s):  
Javier Do Canto ◽  
Rafael Reyno ◽  
Daniel Real ◽  
Clinton Revell
Keyword(s):  
Forage Legumes ◽  
Subtropical Environment

scholarly journals Foliar Transfer of Dust and Heavy Metals on Roadside Plants in a Subtropical Environment

2016 ◽  
Vol 10 (3) ◽  
pp. 137-145 ◽  
Author(s):  
Triratnesh Gajbhiye ◽  
Ki-Hyun Kim ◽  
Sudhir Kumar Pandey ◽  
Richard J. C. Brown
Keyword(s):  
Heavy Metals ◽  
Roadside Plants ◽  
Subtropical Environment

scholarly journals The Impact of Hurricane Irma on Our Community and the Collier Mosquito Control District's Mission

2020 ◽  
Vol 36 (2s) ◽  
pp. 11-14
Author(s):  
Robin A. King ◽  
Rebecca Heinig ◽  
Patrick Linn ◽  
Keira J. Lucas
Keyword(s):  
Mosquito Control ◽  
Electrical Power ◽  
Southwest Florida ◽  
Disease Vector ◽  
Collier County ◽  
Mosquito Management ◽  
The Impact ◽  
Integrated Mosquito Management ◽  
Hurricane Irma ◽  
Subtropical Environment

ABSTRACT The Collier Mosquito Control District, located in southwest Florida, is uniquely positioned in a subtropical environment between the Gulf of Mexico and Everglades National Park. The District's mission is focused on the control of disease vector and nuisance mosquitoes in Collier County, which is accomplished through integrated mosquito management. Hurricane Irma made landfall in the county on September 10, 2017, leaving in its wake tremendous property and infrastructure damage, and it also disrupted communications and airport operations. These factors greatly affected the District's operations and its ability to meet its mission. In addition, the lengthy loss of electrical power forced most residents outdoors, increasing their exposure to mosquitoes. From challenges in completing poststorm treatments to outdated policies that caught us off-guard, the event prompted a new hurricane policy and plan to ensure improved preparedness for the next natural disaster. The poststorm environment also provided a rich foundation for research into mosquito populations after tropical disturbances of this scale. Here we report the impact on the District's aerial mosquito control operations, changes to internal policies, and mosquito population abundance following Hurricane Irma.

scholarly journals Measurement and modelling of evaporation from a coastal wetland in Maputaland, South Africa

2012 ◽  
Vol 9 (2) ◽  
pp. 1741-1782 ◽  
Author(s):  
A. D. Clulow ◽  
C. S. Everson ◽  
M. G. Mengistu ◽  
C. Jarmain ◽  
G. P. W. Jewitt ◽  
...  
Keyword(s):  
Water Balance ◽  
Animal Species ◽  
Coastal Wetland ◽  
Surface Renewal ◽  
Site Specific ◽  
Combination Of Methods ◽  
A Site ◽  
Sr Method ◽  
Subtropical Environment

Abstract. The contribution of freshwater supply from the Mfabeni Mire to Lake St. Lucia during dry periods is important to the survival of certain plant and animal species in the iSimangaliso Wetland Park. This freshwater supply is mainly dependent on the variability of the major components of the water balance, namely rainfall and total evaporation (ET). Attempts to quantify the water balance have been limited through uncertainties in quantifying ET from the Mfabeni Mire. Despite advances in evaporation measurement and modelling from wetlands, there still exists some doubt as to which methods are best suited to characterise wetland ET with most authors suggesting a combination of methods. In this study, the surface renewal (SR) method was successfully used to determine the long-term ET (12 months) from the Mfabeni Mire with calibration using eddy covariance during two window periods of approximately one week each. The SR method was found to be inexpensive, reliable and with low power requirements for unattended operation. The annual ET was lower (900 mm yr−1) than expected, due to cloud cover in summer and low atmospheric demand throughout the year, despite the available water and high windspeeds. Daily ET estimates were compared to the Priestley-Taylor results and a site specific calibration α = 1.0 was obtained for the site. The Priestley-Taylor results agreed well with the actual ET from the surface renewal technique (R2 = 0.96) throughout the 12 month period. A monthly crop factor (Kc) was determined for the standardised FAO-56 Penman-Monteith. However, Kc was variable in some months and should be used with caution for daily ET modelling. These results represent not only some of the first long-term measurements of ET from a wetland in Southern Africa, but also one of the few studies of actual ET in a subtropical peatland in the Southern Hemisphere. The study provides wetland ecologists and hydrologists with guidelines for the use of two internationally applied models for the estimation of wetland ET within a coastal, subtropical environment.

Sign in / Sign up

Export Citation Format

Share Document