Campus de Capanema, Univ Federal Rural da Amazônia (UFRA), Capanema, PA, Brazil.
Depto de Entomologia, Museu Nacional, Univ Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, Brazil.
Neotrop Entomol. 2021 Aug;50(4):630-642. doi: 10.1007/s13744-021-00880-4. Epub 2021 Jun 10.
Leafhoppers (Hemiptera: Cicadellidae) are phytophagous insects that transmit diseases and cause damage to this crop. Thus, the main goal of this study was to verify the spatiotemporal behavior of the leafhoppers Tapajosa ocellata (Osborn, 1926), Dechacona missionum (Berg, 1879), and Dalbulus maidis (DeLong, 1923) in a corn field in Igarapé-Açu, northeastern Pará, northern Brazil. An area of 1.0 ha was used for the development of the study. A mango agroecosystem, a pasture, and secondary forest fragment are adjacent to the experimental area. The sampling of leafhoppers occurred during the 2015 and 2016 harvests. For sampling, 10 random plants per plot were analyzed, totaling 1000 plants per sample. In order to verify the occurrence of leafhoppers, all aerial parts of the plants were analyzed visually. The spatiotemporal behavior of leafhoppers and influence of adjacent areas and phenological stages of corn were verified through geostatistics. From the composition of semivariograms, interpolation maps were constructed by kriging. The results showed that, in 2015, there was a higher incidence of D. maidis compared to the following year. In 2016, 352 individuals of T. ocellata and 66 of D. missionum were observed. Regarding the spatial distribution, it was found that the smallest area of influence of T. ocellata, D. missionum, and D. maidis was 0.09, 0.08, and 0.05 ha, respectively. The spatial distribution of leafhoppers showed an aggregate behavior concentrated close to adjacent areas with a predominance of grasses. Population fluctuation demonstrated that the highest incidence of leafhoppers occurs in the vegetative stages of corn.
叶蝉（半翅目：叶蝉科）是一种以植物为食的昆虫，它们会传播疾病并对这种作物造成损害。因此，本研究的主要目的是验证 Tapajosa ocellata (Osborn, 1926)、Dechacona missionum (Berg, 1879) 和 Dalbulus maidis (DeLong, 1923) 这三种叶蝉在巴西东北部帕拉州北部伊加拉佩-阿苏的玉米地中的时空行为。研究区域为 1.0 公顷。实验区毗邻芒果农业生态系统、牧场和次生林片段。叶蝉的采样发生在 2015 年和 2016 年的收获期间。每个样方分析 10 株随机植物，每个样本共分析 1000 株植物。为了验证叶蝉的发生情况，对所有植物的空中部分进行了目视分析。通过地统计学验证了叶蝉的时空行为以及相邻区域和玉米物候阶段的影响。根据半变异函数的组成，通过克里金插值法构建了插值图。结果表明，2015 年 D. maidis 的发生率高于次年。2016 年观察到 352 只 T. ocellata 和 66 只 D. missionum。关于空间分布，发现 T. ocellata、D. missionum 和 D. maidis 的影响最小面积分别为 0.09、0.08 和 0.05 公顷。叶蝉的空间分布表现出聚集行为，集中在靠近草地的相邻区域。种群波动表明，叶蝉的最高发生率出现在玉米的营养生长阶段。
