Impact of modified caneberry trellis systems on microclimate and habitat suitability for Drosophila suzukii

Caneberries are trellised to facilitate harvest and agrochemical applications as well as to improve crop yield and quality. Trellising can also increase airflow and light penetration within the canopy and affect its microclimate. We compared an experimental trellis that split the canopy into halves to standard I- and V-trellises, measuring Drosophila suzukii (Matsumura) fruit infestation as well as canopy temperature and relative humidity in raspberries at two commercial you-pick diversified farms. To evaluate the combined effects of trellising systems and pruning, we pruned one half of each row in blackberry plantings at two research farms and assessed D. suzukii infestation, canopy microclimate (temperature, relative humidity, and light intensity), fruit quality parameters (interior temperature, total soluble solids, and penetration force), and spray coverage/deposition. Trellis installation costs, labor inputs, and yield were used to further evaluate the trellis systems from an econo..., Sites and experimental design
In 2019 and 2020, an experimental trellis that split the canopy into halves was compared with a growers’ standard I-trellis (Site 1) or T-trellis (Site 2) at two commercial fruit farms in central Maryland in fall-bearing red raspberries (Rubus idaeus L., Site 1 ‘Nantahala’, Site 2 ‘Caroline’). Plantings were maintained following standard commercial practices for primocane fruiting raspberries, and in both years, growers applied insecticides as needed. Three treatment plots per trellising system were compared at each site. At Site 1 rows were spaced 4.0m apart, with treatment plots between 6.5m to 9m in length distributed across three rows. At Site 2 rows were spaced 3.4m apart, with treatment plots between 9.5m to 10.5m in length distributed across three rows. At both sites, up to 20 apparently marketable fruit (visually undamaged and texturally relatively firm) were collected from each row (10 from each side of the row) to evaluate D. suzukii infestation. ..., Data were summarized across subsamples in various ways that are described in the meta data tab of the Excel spreadsheet. Data that were not collected due to low fruit yield or data logger malfuctions are marked not available (NA). ,

藤本浆果类作物（Caneberries）通常会架设棚架，以方便采收与农用化学品施用，同时提升作物产量与品质。棚架架设还可提升冠层内的空气流通与光照穿透率，并改善冠层微气候。本研究在两处商业化自采多元化农场中，以将冠层对半分割的实验性棚架，与标准I型、V型棚架进行对比，测定了覆盆子的斑翅果蝇（Drosophila suzukii (Matsumura)）侵染情况，以及冠层温度与相对湿度。为评估棚架系统与修剪的联合效应，本研究在两处试验农场的黑莓种植园中，对每行植株的一半进行修剪，并评估了斑翅果蝇侵染情况、冠层微气候（温度、相对湿度与光照强度）、果实品质参数（果内温度、总可溶性固形物含量以及穿刺力），以及药剂喷洒覆盖度与沉积量。研究还通过棚架架设成本、劳动力投入与产量，从经济层面进一步评估各棚架系统……
试验地点与实验设计
2019年与2020年，在马里兰州中部的两处商业化水果农场中，针对秋果型红覆盆子（Rubus idaeus L.，其中场地1品种为‘Nantahala’，场地2品种为‘Caroline’），将对半分割冠层的实验性棚架，与种植者使用的标准I型棚架（场地1）或T型棚架（场地2）进行对比。种植园按照秋梢结果覆盆子的标准商业化管理规程进行维护，两年间种植者均按需施用杀虫剂。每个场地均设置三种棚架系统的处理小区进行对比试验。场地1的植株行距为4.0米，处理小区长度介于6.5米至9米之间，分布于三行植株中。场地2的植株行距为3.4米，处理小区长度介于9.5米至10.5米之间，分布于三行植株中。两处场地均从每行植株中采集最多20颗外观合格的果实（视觉上无损伤、质地相对紧实），其中每行两侧各采集10颗，用于评估斑翅果蝇侵染情况。
数据通过多种方式对子样本进行汇总，具体方法详见Excel电子表格的元数据标签页。因果实产量过低或数据记录仪故障未采集到的数据，均标记为‘无有效数据（NA）’。