(1) Animal diseases:

Some species of Saprolegina are parasitic on eggs and gills of fishes.

(2) Destruction of timber:

Armillaria me Ilea causes red rot of apple trees and Polyporus causes wood rot in many trees.

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(3) Spoilage of food:

Spores of Rhizopus, Mucor, Aspergillus germinate on gems, jellies, pickles, bread and destroy them. Penicillium, Mucor, Aspergillus destroy meat.

(4) Destruction of common goods:

Some fungi e.g. Alternaria, Pencillium, Trichoderma, Mucor, Chactomiuni Cephalothecium, Fusaria destroy leather cloth, rubber, paper and even camera lenses.

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(5) Fungi as Poison:

Some fungi as Amantia, which resembles Agaricus are eaten in place of Agaricus and become fatal to man. Aspergillusflavus, A. fumigatus, Penicillium islandicum produce a poisonous substance called aflatoxin while growing on mustard and ground nut cakes. The substance if eaten by animals cause disease in animals.

(6) Hallucinogenic fungi:

From Claviceps fungus is extracted a substance called LSD which is hallucinogenic in man i.e. causes distortion of perception.

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Bryophyta:

They are of less economic importance.

(1) Sphagnum has the capacity to retain water for long periods and such is used to cover the plant roots during transportation.

(2) Some mosses which grow in pools settle to bottom on their death and this helps in soil formation.

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(3) When they grow on rocks they help in soil formation.

(4) Some Bryophyta also work as soil binders when they grow in aggregations.

(5) Some are used as foddes for herbivorus animals.

(6) Some as Sphagnum are used as bed for animals.

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(7) Sphagnum is also used as fuel.

(8) Sphagnum plants are also used to tie grafts.

(9) Sphagnum is also used in seed beds because of its water retention capacity.

Pteridophytes:

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They are mostly used as decoratives in door plants.