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Chapter 5 :-Pest Control

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Pest:-            A pest is any living organism which competes with human,domestic animals or desirable plants for food or water.  At the same time they spread diseases to mankind and harms the environment.  Classification :- I.  Wingless :- Fleas, Lice, bedbugs, silverfish, beetles II. Winged :- Mosquito, house flies, cockroach  Types of pests:- 1.)Fleas :-  These are wingless insects 2-3 mm long with laterally flattened, hard thoraxes and abdomen, and three pairs of legs.   Fleas bite their host causing annoyance; and in case of humans, large red itching spot appears on the skin. Spraying with insecticide is a suitable way of eradicating them. 2.)Lice :-  They are small wingless ectoparasites with hard chitinous covering and having three pairs of legs, each provided with a single claw. They live entirely on mammalian blood. They have oval grayish bodies that become brownish when filled with blood. There is no disease tha...

Chapter 4:- Types of beds and mattresses

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Beds:-           A bed is a  piece of furniture or location primarily used as a place to rest, relax and sleep. To make beds more comfortable, the top layer is frequently a mattress.  Construction of bed:-  Most bed consists of the following parts:- 1.) A frame on which the spring or mattresse rest. 2.) A base which may be made up of open coiled springs,wire mesh or laminated wood strips to provide resilience and support.  3.) A mattress which lies on the top of the springs and provides extra padding.  4.)  Headboard made of painted or varnished wood or an upholstered type. 5.)  Footboard made of wood or metal and lower in height than the headboard.    Types  of beds:- 1.)Murphy bed (Wallbed) :- A bed that can hinge into a wall or cabinet to save space. It is also called "Sico bed". 2.)Sofa bed :- A bed that is stored inside a sofa.  3.)Roll-away bed (Cot) :- A bed whose frame folds in half and ...