Mites ppt
- 1. Mites • Class- Arachnida • Order-Acarina
- 2. • Mites are among one of the most diverse and successful of all invertebrate groups. • They are small in size and often go unnoticed. • They cause loss to stored product. • Also cause damage to beneficial insect like honeybee.
- 3. Characterstics • They found in variety of habitat • Aquatic – Lakes or pond • Terrestrial- Plant, Mammals, Birds and insects or they live freely. • Body is divided in 2 regions – • Cephalothorax • Abdomen • 4 pair of legs • Sucking mouth parts • Lack of antennae & wings.
- 4. • Life cycle consist of egg, larvae, protonymph, deuteronymoh, & adult
- 6. Tetranychidae Spider mites • Body color is red, green, yellow, brown etc. and size 0.2-0.8 mm long. Body is flat, oval. • Chelicerae are fused to form a stylopore and the movable segment of chelicerae forms a flagellate stylet. • There is no mitotic division in larval stage. • Most of the species are having narrow host range. • Thumb claws are present.
- 7. • Tetranychus ludeni • Host- Cowpea, Brinjal & other vegetable crops.
- 8. Damage • Prefer to live on underside of leaves, later spread on whole leaf. • Moderate pop. Reduce the yield while severe infestation could kill the entire plant.
- 9. Tetranychus cinnabarinus • Host- Vegetable, Fruit, Cotton & ornamental plants.
- 10. Damage • More troublesome in warm dry weather • Leaves get covered with strands of webbing finally affect photosynthesis. • Leaves dry and then fall off • Flowering and fruit setting in plants is greatly affected.
- 11. Other sp. that cause damage 1. T. neocaledonicus - brinjal 2. Eutetranychus orientalis 3. Eutetranychus hirsti- Fig 4. Paronychus citri 5. Oligonychus indicus- Sorghum 6. O. coffeae
- 12. Tarsonemidae Broad mites 1. Body is elliptical and body measures 0.1-0.3 mm long. 2. Body is divided into three parts Capitulum, Propodosoma and Prohysterosoma (the later two parts together known as Idiosoma). 3. Mouth parts are contained in a distinct capsular head known as Capitulum. 4. Females are bigger than males and body colour is opaque white light green or pinkish. 5. Adult integument is hard and shiny. 6. Few hairs, spines are present on body. 7. Chelicerae are needle like.
- 13. Palyphagotarsonymus latus • Yellow mite in chilli • It also attack tea and potato • Infested leaves show crinkling and curling effect • Defoliation
- 14. Stenotarsonemus spinki • Paddy panicle mite
- 15. Tenuipalpidae (false spider mites) • Three types of setae namely hysterosal, dorsoventral and mediolateral are present. • The true tarsal claw is hooked or pad like and with tenant hairs • Citrus flat mite- Brevipalpus lewisi • Brevipalpus californicus- It causes serious injury to a wide variety of Ornamental and agricultural crops
- 16. Eriophyidae (Blister, rust, gall mites) 1. Body is minute measuring 0.08-0.2 mm long and body is segmented 2. Body is 2 types: a) Elongate vermiform, worm like, soft body b) Wedge shaped, hard body 3. Body is divided into cephalothorax and tapering abdomen. 4. Abdomen is finely striated with long setae. 5. Two pairs of legs on anterior end of body in all the life stages
- 17. Aceria jasmini • Jasmine mite • Mainly in tamilnadu • White hairy growth on surface of leaves, tender stem & flower bud. • Flower production is affected.
- 18. Acalitus gossypii • Leaf blister mite- Bihar • Cotton wooly mite- Gujarat • Attack on ball and cause greater loss.
- 19. Phyllocate olenvora • Citrus rust mite
- 20. • Aceria litchii • Aceria mangiferae • Aceria cajani