P&D 1

Question 1

What is OPM

Answer 1

Caterpillars that affect oak, people and animals. They feed on oak leaves. The hairs cause eye and skin irritation.

Question 2

OPM control?

Answer 2

Winter surveying for old nests
Destruction of egg masses before they hatch
Insecticide in spring
Pheromone trap

Question 3

Why is compaction bad

Answer 3

Reduces 02 and increases water logging. Does not allow respiration.

Question 4

Viruses? And how they spread

Answer 4

Grows inside cell, once infected stays throughout life. Results in reduced vigour.
Spread by entering through wound and vectors.
Eg poplar mosaic virus.

Question 5

3 types of fungi? Which are good?

Answer 5

Saprohytic myrcorrizal good.
Parasitic bad.

Question 6

How can herbicides be bad

Answer 6

Mis application
Spray drift
Bark absorption.

Question 7

Air pollution factors

Answer 7

Change of physical chemical conditions of soil. Worse in drought. No distinctive signs in foliage. Factory spillage can lead to short term extreme damage.

Question 8

Strimmer damage?

Answer 8

Removal of bark and cambium. Leads to ring barking and death.

Question 9

Hardiness?

Answer 9

Temperature a tree can tolerate. Countries have different hardiness zones.

Question 10

Factors that influence plant selection

Answer 10

Shape, seasonal interest, flowering period, fruit production, hardiness, ability to cope with water.

Question 11

Oomycetes and phytophthera,
Control

Answer 11

Water mould, causes spots on leaves, damaged feeding roots.
Disinfect tools and boots, sanitation felling.

Question 12

Saprophytic?

Answer 12

Feed off dead wood.

Question 13

Mychorrizal?

Answer 13

Symbiotic relationship

Question 14

Brown rot?

Answer 14

Attacks cellulose, leaves lignin intact

Question 15

White rot

Answer 15

Attacks cellulose lignin

Question 16

Ash dieback?

Answer 16

Caused by fungi.