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Wednesday, July 8, 2020 | History

1 edition of Effects of defoliation on growth of certain conifers found in the catalog.

Effects of defoliation on growth of certain conifers

a summary of research literature

by Church, Thomas W.

  • 144 Want to read
  • 9 Currently reading

Published by Northeastern Forest Experiment Station in Upper Darby, Pa .
Written in English

    Subjects:
  • Conifers,
  • Defoliation

  • Edition Notes

    Statementby Thomas W. Church, Jr
    SeriesStation paper / Northeastern Forest Experiment Station -- no. 22, Station paper (Northeastern Forest Experiment Station (Radnor, Pa.)) -- no. 22.
    The Physical Object
    Pagination12 leaves. ;
    Number of Pages12
    ID Numbers
    Open LibraryOL25953197M
    OCLC/WorldCa235957909

      Role of leaf life span in insect herbivore responses and host conifer tolerance to defoliation. Dissertation. University of Wisconsin, Madison, Wisconsin, USA. Krause, S.C., and K. F. Raffa. Comparison of insect, fungal, and mechanically induced defoliation of larch: effects on plant productivity and subsequent host susceptibility.   Effect: sometimes kills portion of twig beyond gall. Notes: can cause significant disease on alternate host apple trees. Pest or Condition: bagworm Evidence: tough, silk-and-needle bags hanging from host foliage; defoliation. Effect: defoliation can be severe and repeated, often ruins yard trees.

    Defoliation is the premature removal of grass parts, usually leaves, by cutting or grazing. Cutting grass by mowing is usually a clean, uniform cut. Grazing animals are selective and do not defoliate plants uniformly or evenly. Each species of livestock interacts differently within the plant-animal-soil continuum because of the different mouth structures (tongue, teeth, lips.   The effects of defoliation can cause stunted or malformed plants and even death to the plant. Woody plants can often tolerate defoliation better because they store reserve energy in their trunks and branches; however, repeated defoliation can lead to their demise as well.

      VanderKlein D W and Reich P B The effect of defoliation intensity and history on photosynthesis, growth and carbon reserves of two conifers with contrasting leaf lifespans and growth habits New Phytol. – Crossref. The effects of defoliation depend primarily on the amount of foliage that is removed, the condition of the tree at the time it is defoliated, the number of consecutive defoliations, available .


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Effects of defoliation on growth of certain conifers by Church, Thomas W. Download PDF EPUB FB2

The Effect of Defoliation on Conifer Seedling Root Initiation.—A positive relationship between conifer seedling root growth and photosynthetic activity has been suggested by several workers (Keller, Forstwiss.

Centralb. ; Etter and Carlson, Can. Plant Sci. ). Since root initiation in lodgepole pine (Pinus. The timing of the defoliation relative to seasonal growth phenology is also important. For example, late season defoliation of hardwoods has a lower impact than does late season defoliation of conifers.

A single late season defoliation of pines often results in tree mortality. Overall, relative growth rates declined during the growing period. Following defoliation, the relative growth rate of the plant increased. Defoliation showed a large effect on the relative growth of leaf weight and leaf area, which were more than doubled in some by: Effects of defoliation on growth of certain conifers: a summary of research literature / Topics: Conifers, Defoliation.

Publisher: Upper Darby, Pa.:Northeastern Forest Experiment Station,[] OAI identifier: oai::item/ Author: Thomas W. Church. The diversity of responses of individual grasses to defoliation created a controversy about 15 years ago, which still needs clarification.

We quantitatively assessed the evidence of defoliation effects on individual grass growth, addressing two main questions: 1) what is the average and variability of the effect of defoliation on plant growth. and 2) what are the associated conditions Cited by: Indeed, defoliation in averaged 80–95%, depending on the species and provenance (Figure 4), and had a significant effect on both apical and lateral growth (P growth stopped entirely during the exponential growth phase.

Introduction. The effects of single stresses including abiotic stresses like drought (Bréda et al. ) and biotic stresses such as insect defoliation (Pinkard et al.

) on tree growth have been well r, they are likely to occur concomitantly in the real world, and increasingly often in the future as climate change will increase their frequency.

The response of older pines to crown scorch or crown consumption is similar to that of conifers to pruning and defoliation. Indirect effects of fire damage to tree growth and mortality may occur through fire-caused changes in soil microorganisms, nutrient cycling or increased attractiveness and susceptability of the trees to insects and disease.

Moreover, bearing in mind that one of the negative effects of climate change is that tree growth is halted, it is taken as proven that the interruption of growth is significantly related to defoliation and crown transparency (Dobbertin,Drobyshev et al., ). Therefore, similarly to growth rings, defoliation data collected from the.

Defoliation reduces the growth and survival of trees, but this influence can be difficult to evaluate largely because of its interplay with various stand and site factors, especially for the highly dynamic defoliation of spruce–fir (Picea–Abies) forests caused by spruce budworm (SBW; Choristoneura fumiferana (Clem.)), the primary tree defoliator in North America.

Relation of starch content to conifer mortality and growth loss after defoliation by the Douglas-fir Tussock moth. Forest Science – Wiley E, Helliker B. A re-evaluation of carbon storage in trees lends greater support for carbon limitation to growth. New Phytologist – In some oak species growth was reduced overall by as much as 50% in years of defoliation, and a continued effect was observed for three years after a defoliation.

Some increase in averages of reducing sugars and certain amino acids occurred in once- and twice-defoliated, watered plants.

Levels of catechin and quercitrin were usually lower in defoliated than in nondefoliated seedlings, regardless of watering, and higher in unwatered seedlings than in watered ones, regardless of defoliation.

Relatively large reductions from defoliation of carbohydrate reserves may also lead to generally greater growth losses from defoliation in conifers vs. deciduous trees (Krause and Raffa, ). applied at different Defoliation Stages on sorghum. Yahya () determined the effect of variety and defoliation on grain cowpea.

Ibrahim (), worked on the effect of stages and intensity of defoliation on the growth and yield of grain cowpea. Silas () also assessed on the effect of intensity of defoliation and spacing on cowpea. Archer S, Detling JK. The effect of defoliation and competition on re-growth of tillers of two North American mixed-grass prairie graminoids.

Oikos. ; – doi: / Augé RM, Moore JL, Sylvia DM, Cho K. Mycorrhizal promotion of host stomatal conductance in relation to irradiance and temperature. Mycorrhiza. Fortunately for us (I try to stay positive), the earlier the defoliation or damage occurs in the season means the trees have a longer time to recover.

But this means that regular water and TLC becomes even more important. Focus on proper watering. As trees push new growth, water is. The effects of partial defoliation on photosynthesis, whole‐seedling carbon allocation, partitioning and growth were studied for two species with contrasting foliar traits.

Field‐grown seedlings of deciduous Japanese larch (Larix leptolepis) and evergreen red pine (Pinus resinosa) were defoliated by hand in early summer for 2. INTRODUCTION 1 INDIVIDUAL PLANT RESPONSES TO DEFOLIATION 3 Immediate effects of defoliation 3 Whole-plant photosynthesis 3 Root growth, respiration, and nutrient uptake 4 Nitrogen fixation 6 Carbohydrate depletion 7 Resource allocation 10 Carbon 10 Nitrogen 12 Photosynthetic capacity 14 Reestablishment of whole-plant photosynthetic capacity other adversities can produce a similar effect.

Hormonal (Growth Regulator) Herbicides - (2,4-D, 2,4-DP, MCPP, dicamba, picloram.) Symptoms are most pronounced on new growth.

Leaf distortion including cupping, curling, abnormal elongation of leaf margins (epinasty) and parallel leaf venation are key symptoms. Current year's shoots may be. Effects of defoliation on growth of certain conifers. Effects of Surrounding Forest and Site Conditions on Growth Reduction of Balsam Fir and Spruce Cause by Spruce Budworm Defoliation.

Views: Downloads: 1. No ratings yet. Download Document >>.Four groundnut (Arachis hypogaea L.) varieties (SAM SAM SMANUT 23 and SAMNUT 24) were grown in the Botanical garden, Department of Biological Sciences, Ahmadu Bello University, Zaria to determine the effects of defoliation on the growth and yield of the experiments were laid out in a completely randomized design with five treatments (defoliation) levels.BIOLOGICAL EFFECTS OF DEFOLIATION ON GRASS PLANTS Llewellyn L.

Manske PhD Associate Range Scientist Defoliation is the removal of plant leaf material by grazing, mowing, burning, hail, frost, or chemical action.

Grass plants have developed adaptive tolerance mechanisms in response to defoliation during the long period of.