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Apiculture– It deals with rearing and maintenance of honeybees for the production of honey on a commercial scale. Different Bee Castes Every honey bee colony comprises of a single queen, a few hundred drones and several thousand worker castes of honey bees. Queen is a fertile, functional female, worker is an unfertile female and the drone is […]
Voltinism is a term used in biology to indicate the number of broods or generations of an organism in a year. or Number of generations per year under natural environmental conditions. Based on voltinism, Bombyx mori is divided in to 3 types, namely i) Univoltines, ii) Bivoltines and iii. Multivoltines. i) UNIVOLTINE RACES: They produce […]
Mulberry cultivation Mulberry is a fast growing deciduous tree occurring in sub tropical and temperate climate. Mulberry has characteristic long idioblast cells in the upper epidermis of leaves. Inflorescence is a catkin / spike with unisexual flowers. Hence it is a cross pollinated crop. The important species of mulberry cultivated in India are , a) […]
The thorax consists of three segments viz., pro, meso and metathorax and each bear onepair of legs called fore, middle and hind legs respectively. Legs are the principal organ oflocomotion and they have undergone many modifications and have been adapted to wide rangeof functions. The generalized insect leg consists of six segments. 1. A basal […]
Mouth parts of insects have many variations in structure and function depending upon theirfeeding situations. Insect mouthparts are broadly classified into two groups:- Mandibulate type (Biting types) (Feeding on solid food) Haustellate type (Sucking type) (Feeding on liquid food) I. Mandibulate types1. BITING AND CHEWING TYPEEg.: Cockroach, Grasshopper, Beetles, Larva Labrum: Rectangular plate like Mandibles: […]