Brown plant hopper (Nilaparvata lugens ,Delphacidae,Homoptera )
- Most distructive pest
- Excess popn causes hopper burn usually observed in patches of ripening phase of the crops .
- Its also transmitted grassy stunt virus disease
- Favorable environment condition is
- BPH can also transmit Rice Ragged Stunt and Rice Grassy Stunt Neither disease can be cured.
Damaging stage :- adult and nymph
Damaging symptoms:
- hopper burn or yellowing, browning and drying of plant
- ovipositional marks exposing the plant to fungal and bacterial infections
- presence of honeydew and sooty molds in the bases of areas infected
- plants with ragged stunt or grassy stunt virus.
Identification
- Egg:- female laying egg inside the sheath by lacerating the plant tissue .
- Nymph:- Brownish black in color having grayish blue eye .
- Adult :-brown color
Life cycle
Egg–5-8 days—–> Nymph –10-15 days–> Adult
Management
- Laval parasitoid like pseudognatopus
- Predator : green mired bug, carabid beetle , lady beetle
- Light trap, rice+soybean(intercrop),transplanting older seed .
- Chloropyrifus 20% Ec @2ml/l
- Buprofenin 25%Ec @ 1g/l, it’s contact inhibitor