Analysis of the Data of the Brown Planthopper (Nilaparvata lugens (Stål.)) with Light Trap in Taiwan

Shung-Shiang Wang ； Fu-Cheng Yen

《中華昆蟲》 4卷2期 (1984/09) Pp. ap2+13-22

https://doi.org/10.6660/TESFE.1984009

摘要

In Taiwan, the quantity of light trap's brown planthopper (BPH) was significantly, positively correlated with BPH density in the field (collected with sweep net). But the former pest was adults (macropterous form) that could fly toward light, while the latter pest included adults (brachypterous form) and nymphas that feeded on hosts and lived at nearby plants. So that the former occurred later. According to analysis, because of different localities the time is also differently lag. Lag days were 0-20 days. The relation between light trap's BPH and climatic factors differed depending on localities and crops. In general, light trap's BPH was significantly and positively correlated with average temperature, duration of sunshine. In normal years the infested area was below 20% of the total paddy fields, while in outbreak years it was over 23%. The percentage of the infested area had significant and positive correlation with the BPH density in paddy field. However, the light trap's BPH had no uniform relation with the percentage of the infested area all over the province.