נגישות
menu      
Advanced Search
Syntax
Search...
Volcani treasures
About
Terms of use
Manage
Community:
אסיף מאגר המחקר החקלאי
Powered by ClearMash Solutions Ltd -
Within orchard spatial distribution of mature avocado trees mortality
Year:
2023
Source of publication :
Phytoparasitica
Authors :
Blank, Lior
;
.
Ezra, David
;
.
Krasnov, Helena
;
.
Shtienberg, Dan
;
.
Shulhani, Ran
;
.
Volume :
10.1007/s12600-022-01038-7
Co-Authors:
  • Lior Blank, 
  • David Ezra, 
  • Joshua Fooks, 
  • Ran Shulhani, 
  • Helena Krasnov 
    Dani Shtienberg 
Facilitators :
From page:
0
To page:
0
(
Total pages:
1
)
Abstract:

The growth and development of mature, fruit bearing, avocado trees in Menashe Heights region of Israel was retarded from the late-2000s. As time passed the trees decayed gradually, leaves dropped off and eventually the trees died. This process usually spanned 2 to 4 years. The objectives of the study were to: (i) map the spatial distribution of symptomatic avocado trees, (ii) evaluate the potential role of topography in contributing to tree mortality, and (iii) estimate the extent of the tree mortality phenomena in the orchards. On April 2020 we mapped eight sub-units of avocado orchards. In each sub-unit we recorded the state of each tree. We estimated the topographic elevation of each tree using a digital elevation model (DEM). The relationship between the topographic elevation of the trees and the incidence of damaged trees were calculated using a logistic regression. Analysis of the spatial distribution of declining and dying trees reveled that they were not randomly distributed in the orchard and were more abundant in the lower zones of the orchards. Close observations of these zones revealed that the soil in these areas was soaked with water during the winter. Accordingly, we hypothesize that due to limited oxygen supply, root growth and water uptake were impaired, resulting in a negative feedback loop that increases soil water content, reduces aeration, and impairs roots’ ability to absorb oxygen. Such conditions could make the roots more susceptible to soil-borne fungi that had damaged the roots of trees, causing them to deteriorate and eventually die.

Note:
Related Files :
Abiotic stresses
climate change
Excess water
Pathology
Persea americana
Show More
Related Content
More details
DOI :
10.1007/s12600-022-01038-7
Article number:
0
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
63234
Last updated date:
15/01/2023 15:10
Creation date:
15/01/2023 15:10
You may also be interested in
Scientific Publication
Within orchard spatial distribution of mature avocado trees mortality
10.1007/s12600-022-01038-7
  • Lior Blank, 
  • David Ezra, 
  • Joshua Fooks, 
  • Ran Shulhani, 
  • Helena Krasnov 
    Dani Shtienberg 
Within orchard spatial distribution of mature avocado trees mortality

The growth and development of mature, fruit bearing, avocado trees in Menashe Heights region of Israel was retarded from the late-2000s. As time passed the trees decayed gradually, leaves dropped off and eventually the trees died. This process usually spanned 2 to 4 years. The objectives of the study were to: (i) map the spatial distribution of symptomatic avocado trees, (ii) evaluate the potential role of topography in contributing to tree mortality, and (iii) estimate the extent of the tree mortality phenomena in the orchards. On April 2020 we mapped eight sub-units of avocado orchards. In each sub-unit we recorded the state of each tree. We estimated the topographic elevation of each tree using a digital elevation model (DEM). The relationship between the topographic elevation of the trees and the incidence of damaged trees were calculated using a logistic regression. Analysis of the spatial distribution of declining and dying trees reveled that they were not randomly distributed in the orchard and were more abundant in the lower zones of the orchards. Close observations of these zones revealed that the soil in these areas was soaked with water during the winter. Accordingly, we hypothesize that due to limited oxygen supply, root growth and water uptake were impaired, resulting in a negative feedback loop that increases soil water content, reduces aeration, and impairs roots’ ability to absorb oxygen. Such conditions could make the roots more susceptible to soil-borne fungi that had damaged the roots of trees, causing them to deteriorate and eventually die.

Scientific Publication
You may also be interested in