forest management n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Forest Management PowerPoint Presentation
Download Presentation
Forest Management

Loading in 2 Seconds...

play fullscreen
1 / 22

Forest Management - PowerPoint PPT Presentation


  • 71 Views
  • Uploaded on

Forest Management. Diseases and Pests that effect a good harvest stand. Original Power Point Created by Melinda Goplin Modified by Georgia Agricultural Education Curriculum Office June 2002. Definition disorder that is caused by something specific with consistant symptoms.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Forest Management' - dominica


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
forest management

Forest Management

Diseases and Pests

that effect a good harvest stand

Original Power Point Created by Melinda Goplin

Modified by Georgia Agricultural Education Curriculum Office

June 2002

what is a disease
Definition

disorder that is caused by something specific with consistant symptoms.

Types of Diseases…

Abiotic

nonliving agent cause

Biotic

living agent causes

fungus, bacteria, parasite, virus, nematodes

What is a Disease?
fungus
Fungus
  • Most destructive in forests
  • Threadlike plants that do not make their own food.
  • Parasitic- when taking food from a living tree
  • Saprophytic- when taking food from dead trees to aid in humus production.
wood rots
Cause:

Fungus decay in trees

Break down cellulose and lignin in cell walls

Very harmful because they are hard to detect from the outside of a living tree.

2 Types

White Rot- break down of cellulose and lignin in the cell walls.

Brown Rot- only break down cellulose

70% of all timber lost

Wood Rots
biotic disease continued
Symptoms

Conk- specialized growth on outside containing fungal spores spread when opened.

Look like mushrooms growing on the sides of the trunk

Prevention

Prevent scaring of trees

Rotate harvest age

Harvest more frequently in mixed age forests

Using these methods doesn’t give fungus the chance to grow.

Biotic Disease continued...
canker
Cause

fungus entering through wounds in the bark

cause lesions that produce callus tissue and damage the woody tissue of the tree, making it less valuable

Symptoms

weak trees

decay for no apparent reason

lesions may be present

Canker
canker1
Treatment

Eliminate infected trees from the stand

Prevention

avoid scaring trees

discard infected trees

Canker

Fungus

slide9
White Pine Blister

fungus disease that contain different spores; effects trees, currents, and gooseberries.

White Pine and Oak is very susceptible

Fusiform

fungal disease that affects Southern Pine and some Oak.

Rust
rust continued
Symptoms

spotted red or brown discoloration of stems and/or leaves

may infest in cones, needles, and stems of conifers

infest only leaves of certain hardwoods

Treatment/Prevention

fungicidal treatments

plant resistant varieties

rid host plants

** All fungi that causes rust spends its live on two different unrelated host plants

Rust continued...
slide11
Cause

fungus invades and grows in the vessles of the xylem tissue.

Why is this harmful?

EX) Dutch Elm Disease is a form of wilt.

Treatment/Prevention

Eliminate insects as they spread disease

discard infected trees

be award of root graft

tree roots grow together underground

Wilt
slide12

** Notice that the oak trees affected by wilt will drop their leaves in the middle of summer.

All three trees in picture show signs of wilt

sunscald
Cause

direct sunlight for extended amount of time

freezing temps followed by a few days of hot sun in late winter/early spring

Symptoms

bark damage

color change

Prevention/Treatment

None

weather related

Sunscald
insects
Insects

Moth

  • Types of Damage
    • Bark Borers
    • Defoliators
    • Root Feeders
    • Terminal Feeders
    • Sucking Insects

spittlebug

bark borers
Bark Borers
  • Bore tunnels into bark and woody parts
  • Female lays eggs in tunnels
  • Larvae feed on xylem and phloem tissues
  • Why is this a big deal?
defoliators
Defoliators
  • Insects feed off leaves and needles
  • Few insects can completely remove foliage from tree in a single season
  • How does this affect the tree?
  • Birch, Maple (both black and sugar)
root feeders
Root Feeders
  • Destroy the rooting tissue when tender and prevent growth.
  • Insects include: wireworms, grubs, weevil
  • Why is this a concern?
terminal feeders
Terminal Feeders
  • Insects that feed on terminal leaders
    • terminal leaders determine which way a branch will grow
  • Cause deformities in branches and quality of trunk is reduced.
  • Insects include: Pine moth and weevil
sucking insects
Sucking Insects
  • Insects equipped with mouthparts that imbed into the leaves and suck out all the chlorophyll and produce honeydew.
  • Why is this bad??
  • Insects include: Aphids, mites, leafhoppers, lice, scales, cicadas, spittlebugs
  • Affects all trees

Aphid

air pollution
Air Pollution
  • Abiotic disease caused by Sulfur and Nitrogen compounds given off by exhaust fumes and factories
  • Damage occurs in leaves and effects photosynthesis
how can we control these problems
How can we control these problems?
  • Mechanical/Biological Control
    • remove dead, decayed trees
    • invite birds into territory
    • introduced predator insects ex)ladybug, ants
  • Chemical Control
    • insecticides, fungicides
    • must be careful when applying
integrated pest management
Integrated Pest Management
  • IPM makes use of all methods in a safe way
  • depends on the use of natural insects first then adds other defense mechanisms
  • Encourages genetically engineered resistant crops to be planted