de Oliveira Fábio Júnior, Farias Paulo Roberto Silva, Noronha Aloyséia Cristina da Silva, Maldonado Junior Walter, Cardoso Luiz Antonio Soares
Universidade Federal Rural da Amazônia (UFRA), Capitão Poço, Pará, Brazil.
Universidade Federal Rural da Amazônia (UFRA), Belém, Pará, Brazil.
Exp Appl Acarol. 2025 May 16;94(4):56. doi: 10.1007/s10493-025-01024-8.
Citrus leprosis is a major viral disease transmitted by the citrus leprosis mite (Brevipalpus spp.), causing significant economic losses in Brazilian citrus farming. This study developed a sequential sampling plan for Brevipalpus spp. in two citrus cultivation systems. Two plots in an orange orchard ('Pêra Rio' variety) in Capitão Poço, Pará, Brazil, were selected: one under monoculture and the other intercropped with teak. Monthly sampling from September 2015 to August 2016 involved 112 georeferenced plants per plot. Mite counts were performed on six fruits, branches, and leaves from both inner and outer plant parts using a 10 × pocket lens. Aggregation indices, including variance-to-mean ratio, Morisita's index, Green's coefficient, and Taylor's power law, revealed an aggregated distribution for all variables. The k parameter of the negative binomial distribution confirmed aggregation, and this model provided the best fit for both systems. The sequential sampling plan determined that the maximum expected sampling units for decision-making is 21 mites per plant and 28 mites per six branches in both systems. These thresholds were established based on the observed distribution pattern and aim to enhance monitoring efficiency. Although these values may seem low, they indicate the infestation level at which control measures should be implemented to prevent economic losses. These findings contribute to improved monitoring strategies for Brevipalpus spp. in citrus orchards, supporting more effective pest management.
柑橘麻风病是一种由柑橘麻风螨（短须螨属）传播的主要病毒性疾病，给巴西柑橘种植业造成了重大经济损失。本研究针对两种柑橘种植系统制定了短须螨属的序贯抽样计划。在巴西帕拉州卡皮唐波苏的一个橙子果园（“佩拉里约”品种）中选取了两块地：一块是单作地，另一块是与柚木间作的地。从2015年9月至2016年8月每月进行抽样，每个地块有112株地理定位植物。使用10倍袖珍放大镜对植株内外六个果实、枝条和叶片上的螨类进行计数。包括方差均值比、森下指数、格林系数和泰勒幂法则在内的聚集指数显示，所有变量均呈聚集分布。负二项分布的k参数证实了聚集性，该模型对两个系统的拟合效果最佳。序贯抽样计划确定，两个系统中用于决策的最大预期抽样单位为每株植物21只螨和每六个枝条28只螨。这些阈值是根据观察到的分布模式确定的，旨在提高监测效率。尽管这些数值可能看起来较低，但它们表明了应实施控制措施以防止经济损失的侵染水平。这些发现有助于改进柑橘果园中短须螨属的监测策略，支持更有效的害虫管理。
