Leptocorisa on Rice - Economic Entomology.ppt

This ppt decsribes about the Rice Earhead bug

1. Rice earhead bug
Leptocorisaacuta(Alydidae:Hemiptera)
Distribution and status: India and rice growing areas
Host range: Rice, Millets
Damage symptoms
Bothnymphsandadultssuckthesapfromindividualgrainsat
milkystage.
Affectedgrainsbecomechaffywithblackspotsatthesiteof
feedingpuncture.
Yieldlossmaybe10-40%.
Obnoxiousodouremanatesondisturbingthebugsinthefield.

2. ETL:5 bugs/100 panicles or 1 bug/hill –
flowering stage; 16 bugs/100 panicles or
3 bug/hill-milky stage.
Bionomics
Brownishgreenadultsareslenderwithlonglegsand
antennae,lay200-300flat,dark,reddishbrowneggsinrowsof
10-15ontheleavesorpanicles.
Theeggperiod5-8days,greentobrownnymphsundergofive
instarsin17-27days.
Adultsfairlylonglived(30-50days).

4. Management
1.Removealternatehost,Echinocloafrombundsandfield.
2.Ensuresynchronousplantingoncommunitybasisinanarea.
3.Useneemseedkernelextract5%ornochileaf(Nirugundi)
powderextract5%orIpomoealeafpowderextract5%or
Prosopisleafpowderextract5%
4.Dustquinalphos1.5Dorcarbaryl10Dormalathion5D@25
kg/ha.