What question did this study set out to answer?

To investigate the seasonal occurrence and life cycle phases of Pochazia shantungensis in Kinokawa City, Japan.

June 3, 2026Annual Report of The Kansai Plant Protection Society0 citationsOpen Access

Seasonal occurrence of Pochazia shantungensis (Hemiptera: Ricaniidae) in Wakayama Prefecture, Japan

MIMasahiro IguchiInstitute of Fruit Tree and Tea Science MKManabu KishiInstitute of Plant Protection HKHiroshi KodamaNihon Nohyaku (Japan)

Key Points

To investigate the seasonal occurrence and life cycle phases of Pochazia shantungensis in Kinokawa City, Japan.
Conducted field observations in Kinokawa City, Wakayama Prefecture over the years 2024 and 2025.
Monitored the life stages from eggs to adults and their reproductive behaviors across different seasons.
First-generation nymphs appeared from early to mid-April.
Adults emerged in mid-June and began oviposition by late June or early July, with the second-generation nymphs hatching in late July.
Second-generation eggs did not hatch until the end of December.

Abstract

The seasonal occurrence of Pochazia shantungensis (Chou and Lu, 1977) was investigated through field observations conducted in Kinokawa City, Wakayama Prefecture in 2024 and 2025. This species overwinters in the egg stage. First-generation nymphs began to appear in early or mid-April. Adults emerged from mid-June and began to lay eggs in late June or early July. Second-generation nymphs began hatching in late July. Adults started to appear from late August, with oviposition beginning in mid or late September and continuing until late November. The eggs laid by the second-generation adults did not hatch until the end of December.

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