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Green Leaf Hopper

Green Leaf Hopper

Nephotettix virescens

insect

In a Nutshell

    Green leafhoppers are common insects in rice fieldsThey thrive in rainfed and irrigated wetland environments and transmit the viral disease tungroCommon symptoms are leaf tip discoloration, reduced number of tillers and stunted plants

Hosts: %1$s

· Rice

Symptoms

Green leafhoppers are the most common leafhoppers in rice fields and transmit the viral disease tungro. The virus lead to leaf tip discoloration, reduced number of tillers, stunted plants with reduced vigor, and in worst cases plant withering. In order to tell the symptoms of tungro-infected crops from nitrogen deficiency or iron toxicity, check for the presence of the insect:white or pale yellow eggs inside leaf sheaths or midribs; yellow or pale green nymphs with or without black markings; pale green adults with or without black markings and with a characteristic diagonal movement.

Trigger

Green leafhoppers are common in rainfed and irrigated wetland environments. They are not prevalent in upland rice. Both the nymphs and adults feed on the dorsal surface of the lateral leaf blades rather than the leaf sheaths and the middle leaves. They also prefer rice plants that have been fertilized with large amount of nitrogen.

Biological Control

Biological control include small wasps (parasitize the eggs), mirid bug; strepsipterans, pipunculid flies, and nematodes (parasitize both the nymphs and adults), aquatic veliid bugs, nabid bugs, empid flies, damselflies, dragonflies, and spiders or fungal pathogens.

Chemical Control

Always consider an integrated approach with preventive measures together with biological treatments if available. Several pesticides are available on the market against this pest. Check with your local retailer which solution best fits the prevalent conditions in the field.

Preventive Measures

    Use insect resistant and tungro resistant varieties (ex: CR-1009)Reduce the number of rice crops to two per yearSynchronize crop establishment across farmsPlant early within a given planting period, particularly in the dry seasonPerform crop rotation with a non-rice crop during the dry seasonLight traps can be used to show or reduce numbersApply nitrogen as recommendedControl weeds in the field and on the field margins to decrease alternate hosts