GK
SOIL AND AGRICULTURE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Inside the mid-rib of leaves
|
|
|
On the dorsal surface of leaves
|
|
|
On the ventral surface of leaves
|
|
|
Inside the tissue of leaf margin
|
Detailed explanation-1: -Each female lays between 100-200 eggs singly into the mid-rib on the underside of the leaves and/or the flowers. Spread over short distances occurs by adults making short flights, and longer distances on nursery plants.
Detailed explanation-2: -Bionomics: Eggs are laid in single into the tissues of the young leaves, shoots, flower stalk and unopened flowers. Incubation period: 4-7 days. Nymphal period: 8-13 days, 5 instars. Life cycle completed in 2-3 weeks.
Detailed explanation-3: -Mango hopper The wedge shaped nymphs and adult insects puncture and suck sap of tender parts, reducing vigour of plants and particularly destroying the inflorescence and causing fruit drop. Heavy puncturing and continuous draining of sap causes curling and drying of infested tissue.