Couplet 28

10/22/2010 3:35:02 AM

10

28a.
Bright greeen nymphs/adults with antennae longer than body.

Insect may be:

28b.
Green larva present with square shaped head.


Insect may be:


GRASSHOPPERS

SKIPPER LARVA






Photos by: Natalie Hummel

Photos by: Johnny Saichuk


Several grasshopper species attack rice in Louisiana. The number of these insects in rice field are usually below levels justifiing insecticide treatment, but they may increase rapidly under favorable conditions and yield losses can occur.

Possible damage: Grasshoppers can cause defoliation, but unless you exceed 20% defoliation    of rice that is actively growing and past the boot stage, then we would not generally recommend a treatment. Grasshoppers can also feed on grains as they develop in the panicle and this can cause blanking as grains mature – you might see a white, empty hull on a panicle. The grasshoppers cause this damage by feeding near the bract at the base of the grain. This damage is usually not severe enough to warrant a treatment.

Beneficial insect: Long-horned grasshoppers in particular (bright green with long antennae) are omnivores – they will feed on vegetation and also other insects. In some cases they can help to manage your rice stink bug infestation by eating the rice stink bugs.

Recommendation: We do not recommend applying an insecticide for grasshoppers unless you are certain they are causing enough of a reduction in yield to cover the cost of a spray. It is possible that a pyrethroid application for rice stink bug or stem borer will also control grasshoppers.

Contact your parish LSU AgCenter extension agent for specific treatment reccomendation.


Larvae of several species of skipper attack rice in Louisiana. The number of these insects in rice field are usually bellow levels justifiing insecticide treatment, but they may increase rapidly under favorable conditions and yield losses can occur.

Contact your parish LSU AgCenter extension agent for specific treatment reccomendation.



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For more information, please see the Rice section of the Insect Pest Management Guide on the LSU AgCenter's Management Guides webpage.

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