Results 51 to 60 of about 1,292,238 (202)

Reação de genótipos de pessegueiro à ferrugem-da-folha Peach genotypes reaction to leaf rust

open access: yesPesquisa Agropecuária Brasileira, 2010
O objetivo deste trabalho foi identificar fontes de resistência à ferrugem-da-folha em pessegueiro. Foram realizadas três avaliações de incidência e severidade de ferrugem-da-folha em 15/1, 14/2 e 24/3 de 2005, em 17 genótipos; em 23/2/2006, a severidade
André Paulo Assmann   +3 more
doaj   +1 more source

Stand Delineation of Pinus sylvestris L. Plantations Suffering Decline Processes Based on Biophysical Tree Crown Variables: A Necessary Tool for Adaptive Silviculture

open access: yesRemote Sensing, 2021
Many planted Pinus forests are severely affected by defoliation and mortality processes caused by pests and droughts. The mapping of forest tree crown variables (e.g., leaf area index and pigments) is particularly useful in stand delineation for the ...
Mª Ángeles Varo-Martínez   +1 more
doaj   +1 more source

Factors affecting Venturia oleaginea infections on olive and effects of the disease on floral biology

open access: yesPhytopathologia Mediterranea, 2019
The disease olive peacock eye was evaluated in organic olive orchards in Palestine (Asira, Burquin, Qabatia and Sir). In each orchard, six trees were randomly chosen (three pruned and three unpruned).
Tahreer Issa   +5 more
doaj   +1 more source

Some aspects of grazing ecosystems : a thesis presented in partial fulfilment of the requirements for the degree of Master of Agricultural Science at Massey University [PDF]

open access: yes, 1970
The conversion of plant material to meat and milk by ruminants is one of the main ways in which the demand for energy and more especially protein for human consumption is met.
Scoffield, John Ernest
core  

Effects of wildfire on a pine stand in the Bohemian Switzerland National Park

open access: yesJournal of Forest Science, 2012
The pine stand in the Havraní Skála locality in the Bohemian Switzerland National Park was affected by an extensive mixed-severity wildfire in summer 2006.
J. Trochta, K. Král, P. Šamonil
doaj   +1 more source

Heritability of peach tree resistance to bacterial leaf spot [PDF]

open access: yesPesquisa Agropecuária Brasileira, 2017
: The objective of this work was to evaluate the broad-sense heritability reaction to bacterial leaf spot (Xanthomonas arboricola pv. pruni), in peach tree populations obtained from directed crosses. Disease severity and defoliation of the genotypes were
André Luiz Varago   +4 more
doaj   +1 more source

Transcriptional Responses to Pre-flowering Leaf Defoliation in Grapevine Berry from Different Growing Sites, Years, and Genotypes

open access: yesFrontiers in Plant Science, 2017
Leaf removal is a grapevine canopy management technique widely used to modify the source–sink balance and/or microclimate around berry clusters to optimize fruit composition.
S. Zenoni   +14 more
semanticscholar   +1 more source

Herbage intake by cattle in kikuyugrass pastures under intermittent stocking method

open access: yesRevista Ciência Agronômica, 2019
Two complementary experiments were conducted to investigate the relationships between the canopy structure of Pennisetum clandestinum (kikuyugrass) pastures created by intermittent stocking strategies and daily herbage intake by cattle.
Daniel Schmitt   +5 more
doaj   +1 more source

A study on the effect of sward conditions on herbage accumulation during winter and spring : a thesis presented in partial fulfilment of the requirements for the degree of Master of Applied Science in Plant Science at Massey University [PDF]

open access: yes, 1999
Recently there has been an increased trend for farmers to adopt farm systems that operate at a reduced stocking rate, with the aim to improve per hectare production through achieving higher production per cow.
Hughes, Fulton Paul
core  

Pest Status of Acraea acerata Hew. and Cylas spp. in sweetpotato (Ipomoea batatas (L.) Lam.) and incidence of natural enemies in the Lake Albert Crescent agro-ecological zone of Uganda. [PDF]

open access: yes, 2015
The present study presents the results of farmers’ field surveys of the sweetpotato butterfly, Acraea acerata Hew., and the two African sweetpotato weevils, Cylas puncticollis Boheman and C. brunneus F. infestation and damage.
Kroschel, J., Okonya, J.
core   +1 more source

Home - About - Disclaimer - Privacy