Results 31 to 40 of about 18,616 (246)

Monitoring of sawfl y ( Hymenoptera: Tenthredinidae Hymenoptera: Tenthredinidae ) infestation on spruce

open access: yesJournal of Forest Science, 2002
A new method for evaluating damage caused by tenthredinids to Norway spruce stands is based on defoliation of the top whorls. A scale with four classes of defoliation was established that is easy to use. Defoliation can be displayed graphically on a grid
J. Holuša, O. Holuša
doaj   +1 more source

Changes in oak (Quercus robur) photosynthesis after winter moth (Operophtera brumata) herbivory are not explained by changes in chemical or structural leaf traits [PDF]

open access: yes, 2020
Insect herbivores have the potential to change both physical and chemical traits of their host plant. Although the impacts of herbivores on their hosts have been widely studied, experiments assessing changes in multiple leaf traits or functions ...
Gripenberg, Sofia   +5 more
core   +1 more source

Effect of Planting Date, Clipping Height, and Cultivar on Forage and Grain Yield of Winter Wheat in Argentinean Pampas [PDF]

open access: yes, 2006
In Argentinean Pampas, new wheat (Triticum aestivum L.) cultivars are routinely introduced to farmers for dual-purpose production. The objective of this study was to evaluate the effect of planting date, clipping height on forage, and grain yield for ...
Arroquy, Jose Ignacio   +3 more
core   +1 more source

Effect of post-grazing residual leaf blade-length on the regrowth vigor of Piatã grass grazed under intermittent stocking

open access: yesSemina: Ciências Agrárias, 2019
The objective of this study was to evaluate the effect of post-grazing residual leaf blades (RLB) of different lengths on the morphogenic and structural characteristics of Urochloa brizantha ‘Piatã’ grazed upon by beef cattle.
Wagner Soares da Costa Junior   +3 more
doaj   +1 more source

Environmental Impact of Silicic Magmatism in Large Igneous Province Events

open access: yesGeophysical Monograph Series, Page 133-151., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Scott E. Bryan
wiley  

+1 more source

STUDY OF DEFOLIATION INTENSITY AND NITROGEN RATE EFFECTS ON YIELD, YIELD COMPONENTS AND GERMINATION TRAITS OF PRODUCED SEED IN WHEAT (Triticum aestivum)

open access: yesAgricultura, 2013
A field experiment and a laboratory experiment were conducted in 2011-2012 to determine the effect of defoliation intensity and nitrogen rate on yield, yield components and seed germination of wheat (Triticum aestivum).
Heidari Hassan   +3 more
doaj   +1 more source

Leaf tissue flows and defoliation patterns of Alexandergrass grazed by heifers receiving energy supplement

open access: yesActa Scientiarum: Animal Sciences, 2019
The study was carried out to evaluate defoliation patterns and to quantify leaf tissue flows in Alexandergrass (Urochloa plantaginea (Link.) Hitch) grazed by beef heifers receiving whole rice bran in three levels of supplementation (0, 0.5 and 1 % of ...
Paula de Oliveira Severo   +5 more
doaj   +1 more source

Interactive effect of herbivory and competition on the invasive plant Mikania micrantha. [PDF]

open access: yesPLoS ONE, 2013
A considerable number of host-specific biological control agents fail to control invasive plants in the field, and exploring the mechanism underlying this phenomenon is important and helpful for the management of invasive plants.
Junmin Li   +3 more
doaj   +1 more source

Frequencies and intensities of defoliation in Aruana guineagrass swards: morphogenetic and structural characteristics [PDF]

open access: yesRevista Brasileira de Zootecnia, 2012
The objective of this study was to evaluate the morphogenetic and structural characteristics of Aruana guineagrass pastures (Panicum maximum cv. Aruana) subjected to rotational stocking by sheep. The treatments corresponded to grazing when swards reached 95 or 98% of interception of incident light (LI) until post-grazing heights of 10 and 15cm and were
Zanini, Guilherme Doneda   +2 more
openaire   +4 more sources

Grazing intensity and leaf functional traits drive herbivore defoliation patterns in native grasslands

open access: yes, 2023
The producer-herbivore interaction influences the dynamic and structure of ecosystems, altering biogeochemical functions and processes, such as carbon sequestration, nutrient cycling and plant succession. Improving understanding of factors that drive herbivore grazing decisions and describing the mechanistic link between plant functional traits and ...
Caram, Nicolas   +6 more
openaire   +1 more source

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