Results 11 to 20 of about 2,099 (142)

Spatial re-establishment dynamics of local populations of vectors of Chagas disease. [PDF]

open access: yesPLoS Neglected Tropical Diseases, 2009
Prevention of Chagas disease depends mainly on control of the insect vectors that transmit infection. Unfortunately, the vectors have been resurgent in some areas. It is important to understand the dynamics of reinfestation where it occurs.
Heinrich Zu Dohna   +4 more
doaj   +1 more source

Research on weed identification method in rice fields based on UAV remote sensing

open access: yesFrontiers in Plant Science, 2022
Rice is the world’s most important food crop and is of great importance to ensure world food security. In the rice cultivation process, weeds are a key factor that affects rice production.
Fenghua Yu   +9 more
doaj   +1 more source

Impact of site-specific weed management on herbicide savings and winter wheat yield

open access: yesPlant, Soil and Environment, 2013
An aggregated distribution pattern of weed populations provides opportunity to reduce the herbicide application if site-specific weed management is adopted.
P. Hamouz   +3 more
doaj   +1 more source

Impact of site-specific weed management in winter crops on weed populations

open access: yesPlant, Soil and Environment, 2014
This work is focused on evaluating the effects of site-specific weed management (SSWM) on weed populations over a 4-year period. SSWM was used on a 3.07 ha experimental field during 2011-2014 in a rotation of winter wheat and winter oilseed rape.
P. Hamouz   +3 more
doaj   +1 more source

Effect of site-specific weed management in winter crops on yield and weed populations

open access: yesPlant, Soil and Environment, 2014
Site-specific weed management (SSWM) methods allow spatially variable treatment of weed populations according to actual weed abundance, thus offering the opportunity for herbicide savings.
P. Hamouz   +3 more
doaj   +1 more source

Intra‐site sources of restoration variability in severely invaded rangeland: Strong temporal effects of herbicide–weather interactions; weak spatial effects of plant community patch type and litter

open access: yesEcological Solutions and Evidence, 2022
Invasions by exotic annual grasses (EAGs) are replacing native perennials in semiarid areas globally, including the vast sagebrush‐steppe rangelands of western North America.
Rebecca Donaldson, Matthew J. Germino
doaj   +1 more source

The dark ventral patch: A bimodal flexible trait related to male competition in red deer.

open access: yesPLoS ONE, 2020
Sexual signals play a central role in male-male competition in polygynous species. In red deer (Cervus elaphus), male's ventral area become dark during the rutting season due to urine spraying behaviour and retains many chemical compounds potentially ...
Juan Carranza   +8 more
doaj   +1 more source

The Sky Is Not the Limit: Use of a Spray Drone for the Precise Application of Herbicide and Control of an Invasive Plant in Managed Wetlands

open access: yesRemote Sensing, 2023
Controlling non-native plant invasions that reduce the quality of preferred wetland habitats is a challenge for many wetland managers. Herbicides may be used to control invasions, but it may be difficult to find effective application methods depending on
John Y. Takekawa   +5 more
doaj   +1 more source

Improving the efficiency of spatially selective operations for agricultural robotics in cropping field

open access: yesSpanish Journal of Agricultural Research, 2013
Cropping fields often have well-defined poor-performing patches due to spatial and temporal variability. In an attempt to increase crop performance on poor patches, spatially selective field operations may be performed by agricultural robotics to apply ...
Y. L. Li, S. P. Yi
doaj   +1 more source

The Relationship Between Patch Spraying Cost and Target Weed Distribution [PDF]

open access: yes, 2012
Carroll and Holden (2005) defined a method for quantifying weed distributions using distance transform analysis as a first-step in relating the distribution of weeds in a field to the type and cost of equipment used to spray the field (Carroll and Holden, 2009).
Carroll, John, Holden, Nicholas
openaire   +3 more sources

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