QUANTIFYING PREDATION BY UMMELIATA INSEC‐TICEPS BOES. ET STR. (ARANEAE: LINYPHIIDAE) ON RICE PLANTHOPPERS USING ELISA *
QUANTIFYING PREDATION BY UMMELIATA INSEC‐TICEPS BOES. ET STR. (ARANEAE: LINYPHIIDAE) ON RICE PLANTHOPPERS USING ELISA *
复制标题
DOI：
10.1111/j.1744-7917.1999.tb00013.x
复制
发表时间：
1999-03
期刊：
影响因子：
4
通讯作者：
Guren Zhang;Wenqing Zhang;D. Gu
中科院分区：
文献类型：
--
作者：
Guren Zhang;Wenqing Zhang;D. Gu
摘要 已经开发出一种酶联免疫吸附测定（ELISA）来量化 Ummeliata 昆虫的捕食情况。等海峡广东省大沙乡稻田稻飞虱防治.该测定完全针对稻飞虱材料。昆虫U. 昆虫成虫在室温下取食白背飞虱（WBPH）、白背飞虱（Horvath）和褐飞虱（BPH）、褐飞虱（Stal）的3～5龄若虫后，抗原检测时间分别为96小时和120小时。早稻季节，白背飞虱评分为阳性的个体捕食者物种比例为 19. 05% 至 47. 34%，褐飞虱评分为 9. 25% 至 66. 67%。尽管随着猎物密度的增加，被食虫捕食的稻飞虱数量增加，但捕食率却下降。当稻飞虱密度较低时，其捕食率相对较高。这种捕食现象可以解释为什么自1973年以来大沙乡稻田稻飞虱从未达到爆发水平。
Abstract An enzyme‐linked immunosorbent assay (ELISA) has been developed to quantify predation by Ummeliata insecticeps Boes. et Str. on rice planthoppers in paddy fields in Dasha Township, Guangdong Province. The assay was completely specific for rice planthopper materials. The detection periods for antigens after an adult of U. insecticeps had fed on three 3–5th instar nymphs of white‐back planthopper (WBPH), Sogatella furcifera (Horvath), and brown planthopper (BPH), Nilaparvata lugens (Stal), at room temperature were 96 h and 120 h, respectively. The proportion of individual species of predators scoring positive ranged from 19. 05% to 47. 34% for WBPH, and from 9. 25% to 66. 67% for BPH in the early rice season. Although the numbers of the rice planthoppers consumed by U. insecticeps increased with increasing prey densities, the predation rates declined. When rice planthopper densities were low, the predation rates were relatively high. This kind of predation can explain why the rice planthoppers have never reached outbreak levels in rice fields in Dasha Township since 1973.