Nysius huttoni
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Author(s): Natasha Wright, Florida Department of Agriculture and Consumer Services
Source: IPM Images
Nysius huttoni White, 1878 - (New Zealand wheat bug)
This species is a polyphagous plant sucking pest, native to New Zealand. It has been recorded from Europe since 2002 and has been intercepted on shipments like apple from New Zealand. Among the crops, wheat and Brassica crops are mainly attacked in New Zealand. It also feeds on various weed species which appears to be its main habitat. On wheat it feeds on the developing grain and injects a special enzyme into the grain which affects its baking quality. As little as 1% damaged grain in a harvest can make the grain unsuitable for baking. During an outbreak in 1970 in New Zealand, 10,000 tons of wheat were damaged by this insect. The development from egg, through 5 nymphal stages, to mature adult lasts about 1 month under warm conditions (25-30°C), but increases to 2-3 months with cooler temperatures (15-25°C). There are 3 generations per year in New Zealand.
The adult is approximately 3-4 mm long, brownish green in colour and mottled with dark gray. The species shows wing polymorphism, with most adults (94%) being macropterous in New Zealand, about 5% sub-brachypterous and less than 1% brachypterous. On the other hand, only 20% of the adults collected in Belgium were macropterous.
For a review see Tiwari & Wratten (2019).
- Other images of Nysius huttoni (IPM Images and PaDIL - click to enlarge)
nymph
head
head
head and pronotum
head and thorax
forewing
