Scientific Name: Rhopalosiphum maidis
They are the most important pests of jowar and heavy infestation is noticed on rabi crops. Besides sucking the sap from the foliage, their injuries cause exuding of cell sap. which crystallizes on evaporation They also excrete honey dew like substance.
This type of formation of sugary material on the plant is locally called as ‘
Marks of Identification: Nature of Damage: Host Plants: Life History: Control Measures:
They are minute soft bodied, oblong insects usually light green or slightly yellow in colour They remain stationary mostly on the lower surface of the leaves and do not move unless disturbed. They are mostly wingless but become winged at the time of maturity of the crop.
Nymphs and adults of both the pests suck the sap from the leaves As a result the leaves turn yellow and in case of heavy infestation, the plants remain stunted Due to sugary material oozing out of the plant and that excreted by the aphids and delphacids, the black sooty mould develops and the leaves turn blackish which results adversely in photosynthetic activity and the yield.
Jowar, bajra maize and other cereals and sugarcane crops.
Females reproduce viviparous and parthenogenetically On an average, each female produces about 42 young ones within a period of 5 days. Nymphs moult 4 times in a period of 5 days, A generation is completed within 2 weeks.
First application immediately incidence is noticed as per scheduled.
Marks of Identification:
Nature of Damage: