Results 61 to 70 of about 1,292,238 (202)

Effects of defoliation by the pine processionary moth Thaumetopoea pityocampa on biomass growth of young stands of Pinus pinaster in northern Portugal

open access: yesiForest - Biogeosciences and Forestry, 2010
Biomass growth models for 13-year-old maritime pine tree stands (Pinus pinaster Ait.) in the north-eastern Portugal were developed and used to analyse the effects of the defoliation by the pine processionary moth, Thaumetopoea pityocampa (Den. & Schiff.)
Arnaldo PS, Chacim S, Lopes D
doaj   +1 more source

Forest Net Primary Production Resistance Across a Gradient of Moderate Disturbance [PDF]

open access: yes, 2014
The global carbon (C) balance is vulnerable to disturbances that alter terrestrial C uptake and loss. Moderate disturbances that kill or defoliate only a subset of canopy trees such as insect defoliation, drought, and age-related senescence are ...
Goodrich-Stuart, Ellen
core   +1 more source

Chemical control of the soybean target spot (Corynespora cassiicola) in the cerrado of tocantins - Brazil

open access: yesJournal of Bioenergy and Food Science, 2017
The fungus Corynespora cassiicola (Berk. & M.A. Curtis), the causal agent of the target spot in soybean, have occurred frequently in the North Central region of Brazil and may, under high temperature and high humidity conditions, cause serious damage to ...
Francisco de Carvalho Ribeiro   +4 more
doaj   +1 more source

Carbon partitioning between shoot organs following early leaf removal

open access: yesBIO Web of Conferences, 2019
In grapevines, basal leaf removal at bloom often induces a reduction of fruit set. The effect is related to a reduction in carbon availability for different plant organs competing for photosynthates.
Sabbatini Paolo   +6 more
doaj   +1 more source

Características morfogênicas e estruturais do capim-xaraés submetido a alturas de corte [PDF]

open access: yes, 2010
The objective of this work was to evaluate the morphogenetic and structural characteristics of xaraes palisadegrass submitted to three cutting heights (15, 20 and 25 cm) when the sward reached 95% of light interception during regrowth. The experiment was
FONSECA, Dilermando Miranda da   +6 more
core   +5 more sources

Computer analysis and mapping of gypsy moth levels in Pennsylvania using LANDSAT-1 digital data [PDF]

open access: yes
The effectiveness of using LANDSAT-1 multispectral digital data and imagery, supplemented by ground truth and aerial photography, was investigated as a new method of surveying gypsy moth (Porthetria dispar (L.)) (Lepidoptera; Lymantriidae) defoliation ...
Williams, D. L.
core   +1 more source

The Response of Zigadenus fremontii to Variation in Fire Regime [PDF]

open access: yes, 2010
California\u27s chaparral shrub communities are naturally exposed to dry-season fire. It could be reasoned that prescription burns set during the wet season by land managers would have more detrimental effects on plant regeneration than dry season fires
Dinis, Shannon Elizabeth
core   +1 more source

Evaluation of peanut genotypes for resistance to Cercospora leaf spot diseases in Iran

open access: yesJournal of Crop Protection, 2018
The early and late blight are important diseases of peanut. The reactions of eleven peanut genotypes Arachis hypogea L. and one local cultivar (cv. Goli) to Cercospora leaf spot (CLS) diseases were evaluated under CLS high incidence field conditions ...
Mahmoud Houshyarfard   +1 more
doaj  

Chemical Control of Powdery Mildew of Bigleaf Hydrangea

open access: yesHortScience
The efficacy of the fungicide pydiflumetofen + difenoconazole (Postiva) was evaluated at varying application rates and intervals for the control of powdery mildew (Golovinomyces orontii, formerly Erysiphe polygoni) in bigleaf hydrangea (Hydrangea ...
Christina Jennings   +6 more
doaj   +1 more source

Timing of leaf removal modifies chemical and phenolic composition of Sauvignon Blanc wine

open access: yesBIO Web of Conferences, 2017
The objective of this work was to evaluate the effect of different defoliation times on the chemical and phenolic composition of Sauvignon Blanc wine in high altitude regions of Santa Catarina - Brazil.
Wurz Douglas André   +7 more
doaj   +1 more source

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