Laodelphax striatellus

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Laodelphax striatellus (click on image to enlarge it)
Author(s): Ferran Turmo Gort
Source: Flickr
Laodelphax striatellus (click on image to enlarge it)
Author(s): Christophe Quintin
Source: Flickr

Laodelphax striatellus (Fallén, 1826) - (small brown planthopper)

The planthopper is an important pest of rice in of Asia. It may cause hopperburn and transmits plant viruses like the Rice stripe virus (RSV) or the Rice black streaked dwarf virus. RSV is transmitted in a persistent, circulative, and propagative manner. The virus can replicate in the ovaries and the infection can be passed on to the progeny. Insecticides are used for control, but pesticide resistance has become a problem. Resistant cultivars are available, but resistance breakdown has also been reported.

In some parts of Asia, outbreaks have become more frequent since 1999. The planthopper has a wide distribution in Asia and Europe and feeds on various other cereals and grasses (e.g. wheat and maize). Several mass overseas migrations have been reported in Asia. The length of the life cycle is variable. In northern countries there is only one generation per year, while in more southern areas up to 4 generations have been reported. During the winter, nymphs can enter into diapause.

Vernacular names
• Deutsch: Getreidezikade
• English: small brown planthopper
• Français: cicadelle brune mineure

Like with a number of other delphacids, adult might develop into a short-winged, sessile form (brachypter), or into a long-winged form (macropter) which is able to fly. Female brachypters are 2½-3 mm long, macropters 3-4½ mm. Males are about 2 mm long.

Synonyms:
Laodelphax striatella