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Heath M, St-Onge D, Hausler R. UV reflectance in crop remote sensing: Assessing the current state of knowledge and extending research with strawberry cultivars. PLoS One 2024; 19:e0285912. [PMID: 38527020 PMCID: PMC10962828 DOI: 10.1371/journal.pone.0285912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Accepted: 01/10/2024] [Indexed: 03/27/2024] Open
Abstract
Remote sensing of spectral reflectance is a crucial parameter in precision agriculture. In particular, the visual color produced from reflected light can be used to determine plant health (VIS-IR) or attract pollinators (Near-UV). However, the UV spectral reflectance studies largely focus on non-crop plants, even though they provide essential information for plant-pollinator interactions. This literature review presents an overview of UV-reflectance in crops, identifies gaps in the literature, and contributes new data based on strawberry cultivars. The study found that most crop spectral reflectance studies relied on lab-based methodologies and examined a wide spectral range (Near UV to IR). Moreover, the plant family distribution largely mirrored global food market trends. Through a spectral comparison of white flowering strawberry cultivars, this study discovered visual differences for pollinators in the Near UV and Blue ranges. The variation in pollinator visibility within strawberry cultivars underscores the importance of considering UV spectral reflectance when developing new crop breeding lines and managing pollinator preferences in agricultural fields.
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Affiliation(s)
- Megan Heath
- Department of Environmental Engineering, École de technologie supérieure, Montreal, Quebec, Canada
| | - David St-Onge
- Department of Mechanical Engineering, École de technologie supérieure, Montreal, Quebec, Canada
| | - Robert Hausler
- Department of Environmental Engineering, École de technologie supérieure, Montreal, Quebec, Canada
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Shan Y, Zhou XS, Cai XM, Luo ZX, Li ZQ, Xiu CL, Chen ZM, Bian L. Mating and post-copulation behavior in the tea leafhopper, Empoasca onukii (Hemiptera: Cicadellidae). FRONTIERS IN PLANT SCIENCE 2023; 14:1273718. [PMID: 37860253 PMCID: PMC10583563 DOI: 10.3389/fpls.2023.1273718] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 09/20/2023] [Indexed: 10/21/2023]
Abstract
The tea leafhopper, Empoasca onukii, relies on substrate-borne vibrations for sexual communication and is mainly controlled with chemical pesticides, which poses risks to the environment and food safety. Based on previous studies, we conducted a series of behavioral assays by simultaneous observation of vibration signals and movement to investigate the mating and post-copulation behavior of tea leafhoppers. During mating, the activity of E. onukii was restricted to dawn and dusk and concentrated on the sixth or seventh mature leaf below the tea bud. By comparing the time spent in locating females among different males, the timely reply of females was the key factor affecting mating success. Empoasca onukii females mated only once in their lives, while males could mate multiple times. Male rivalry behavior involved two distinct strategies. The rivals could send disruptive pulses to overlap the male calling signals, locate the courting males, and drive them away after contact. Some rivals could emit mating disruption signals (MDSs) to interrupt the ongoing identification duet and establish their own mating communication. Both identification and location duets could be interrupted by playback of MDSs, which is essential to create effective synthetic signals to disrupt mating communication of E. onukii. Our study clarified the spatial and temporal distribution of E. onukii in mating and the function of MDSs, which will be essential to develop future vibrational mating disruption techniques for E. onukii and its energy-efficient application in the field.
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Affiliation(s)
- Yao Shan
- Tea Research Institute, Chinese Academy of Agricultural Science, Hangzhou, China
| | - Xiao-Sen Zhou
- Tea Research Institute, Chinese Academy of Agricultural Science, Hangzhou, China
| | - Xiao-Ming Cai
- Tea Research Institute, Chinese Academy of Agricultural Science, Hangzhou, China
- Key Laboratory of Biology, Genetics and Breeding of Special Economic Animals and Plants, Ministry of Agriculture and Rural Affairs, Hangzhou, China
| | - Zong-Xiu Luo
- Tea Research Institute, Chinese Academy of Agricultural Science, Hangzhou, China
- Key Laboratory of Biology, Genetics and Breeding of Special Economic Animals and Plants, Ministry of Agriculture and Rural Affairs, Hangzhou, China
| | - Zhao-Qun Li
- Tea Research Institute, Chinese Academy of Agricultural Science, Hangzhou, China
- Key Laboratory of Biology, Genetics and Breeding of Special Economic Animals and Plants, Ministry of Agriculture and Rural Affairs, Hangzhou, China
| | - Chun-Li Xiu
- Tea Research Institute, Chinese Academy of Agricultural Science, Hangzhou, China
- Key Laboratory of Biology, Genetics and Breeding of Special Economic Animals and Plants, Ministry of Agriculture and Rural Affairs, Hangzhou, China
| | - Zong-Mao Chen
- Tea Research Institute, Chinese Academy of Agricultural Science, Hangzhou, China
- Key Laboratory of Biology, Genetics and Breeding of Special Economic Animals and Plants, Ministry of Agriculture and Rural Affairs, Hangzhou, China
| | - Lei Bian
- Tea Research Institute, Chinese Academy of Agricultural Science, Hangzhou, China
- Key Laboratory of Biology, Genetics and Breeding of Special Economic Animals and Plants, Ministry of Agriculture and Rural Affairs, Hangzhou, China
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Shan Y, Xu M, Tan C, Chen Z, Wang G, Bian L. Effect of monochromatic light on light adaptation and opsin expression in Ectropis grisescens. BULLETIN OF ENTOMOLOGICAL RESEARCH 2023; 113:529-536. [PMID: 37350427 DOI: 10.1017/s0007485323000202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/24/2023]
Abstract
Light has a substantial effect on the behaviour and physiology of nocturnal moths. Ectropis grisescens is a major nocturnal tea pest in China, and light traps are commonly used to control geometrid moths because of their positive phototaxis. However, some moths gather around light traps and enter the light adaptation state, which decreases the efficacy of light traps in controlling this pest. We identified opsin genes and the spectral sensitivities of the photoreceptors of E. grisescens moths. We also determined the effects of several monochromatic lights on opsin gene expression and light adaptation. We detected three types of opsin genes and six spectral sensitive peaks (at 370, 390, 480, 530, 550, and 580 nm). We also observed significant changes in the diurnal rhythm of opsin gene expression under different light conditions. When active males were suddenly exposed to different monochromatic lights, they quickly entered the light adaptation state, and the adaptation time was negatively correlated with the light intensity. Males were most sensitive to 390 nm wavelengths, followed by 544 nm, 457 nm, and 593 nm. Red light (627 nm) did not affect the activity of E. grisescens males but had detectable physiological effects.
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Affiliation(s)
- Yao Shan
- Tea Research Institute, Chinese Academy of Agricultural Science, 9 Meiling South Road, Xihu District, Hangzhou, China
- Henan Institute of Science and Technology, Wallan Avenue East, Hongqi District, Xinxiang, China
| | - Manfei Xu
- Tea Research Institute, Chinese Academy of Agricultural Science, 9 Meiling South Road, Xihu District, Hangzhou, China
- Henan Institute of Science and Technology, Wallan Avenue East, Hongqi District, Xinxiang, China
| | - Chang Tan
- Tea Research Institute, Chinese Academy of Agricultural Science, 9 Meiling South Road, Xihu District, Hangzhou, China
- Key Laboratory of Tea Biology and Resource Utilization, Ministry of Agriculture, 9 Meiling South Road, Xihu District, Hangzhou, China
| | - Zongmao Chen
- Tea Research Institute, Chinese Academy of Agricultural Science, 9 Meiling South Road, Xihu District, Hangzhou, China
- Key Laboratory of Tea Biology and Resource Utilization, Ministry of Agriculture, 9 Meiling South Road, Xihu District, Hangzhou, China
| | - Guochang Wang
- Henan Institute of Science and Technology, Wallan Avenue East, Hongqi District, Xinxiang, China
| | - Lei Bian
- Tea Research Institute, Chinese Academy of Agricultural Science, 9 Meiling South Road, Xihu District, Hangzhou, China
- Key Laboratory of Tea Biology and Resource Utilization, Ministry of Agriculture, 9 Meiling South Road, Xihu District, Hangzhou, China
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Tan C, Cai X, Luo Z, Li Z, Xiu C, Chen Z, Bian L. Visual acuity of Empoasca onukii (Hemiptera, Cicadellidae). INSECTS 2023; 14:370. [PMID: 37103185 PMCID: PMC10145553 DOI: 10.3390/insects14040370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 04/04/2023] [Accepted: 04/05/2023] [Indexed: 06/19/2023]
Abstract
Empoasca onukii is a common tea plant pest with a preference for the color yellow. Past work has shown that host leaf color is a key cue for habitat location for E. onukii. Before studying the effect of foliage shape, size, or texture on habitat localization, it is necessary to determine the visual acuity and effective viewing distance of E. onukii. In this study, a combination of 3D microscopy and X-ray microtomography showed that visual acuity did not significantly differ between females and males, but there were significant differences in the visual acuity and optical sensitivity among five regions of E. onukii's compound eyes. The dorsal ommatidia had the highest visual acuity at 0.28 cycles per degree (cpd) but the lowest optical sensitivity (0.02 μm2sr), which indicated a trade-off between visual resolution and optical sensitivity for E. onukii. The visual acuity determined from the behavioral experiment was 0.14 cpd; E. onukii exhibited low-resolution vision and could only distinguish the units in a yellow/red pattern within 30 cm. Therefore, visual acuity contributes to the limited ability of E. onukii to distinguish the visual details of a distant target, which might be perceived as a lump of blurred color of intermediate brightness.
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Affiliation(s)
- Chang Tan
- Tea Research Institute, Chinese Academy of Agricultural Science, 9 Meiling South Road, Xihu District, Hangzhou 310008, China
| | - Xiaoming Cai
- Tea Research Institute, Chinese Academy of Agricultural Science, 9 Meiling South Road, Xihu District, Hangzhou 310008, China
- Key Laboratory of Tea Biology and Resource Utilization, Ministry of Agriculture, 9 Meiling South Road, Xihu District, Hangzhou 310008, China
| | - Zongxiu Luo
- Tea Research Institute, Chinese Academy of Agricultural Science, 9 Meiling South Road, Xihu District, Hangzhou 310008, China
- Key Laboratory of Tea Biology and Resource Utilization, Ministry of Agriculture, 9 Meiling South Road, Xihu District, Hangzhou 310008, China
| | - Zhaoqun Li
- Tea Research Institute, Chinese Academy of Agricultural Science, 9 Meiling South Road, Xihu District, Hangzhou 310008, China
- Key Laboratory of Tea Biology and Resource Utilization, Ministry of Agriculture, 9 Meiling South Road, Xihu District, Hangzhou 310008, China
| | - Chunli Xiu
- Tea Research Institute, Chinese Academy of Agricultural Science, 9 Meiling South Road, Xihu District, Hangzhou 310008, China
- Key Laboratory of Tea Biology and Resource Utilization, Ministry of Agriculture, 9 Meiling South Road, Xihu District, Hangzhou 310008, China
| | - Zongmao Chen
- Tea Research Institute, Chinese Academy of Agricultural Science, 9 Meiling South Road, Xihu District, Hangzhou 310008, China
- Key Laboratory of Tea Biology and Resource Utilization, Ministry of Agriculture, 9 Meiling South Road, Xihu District, Hangzhou 310008, China
| | - Lei Bian
- Tea Research Institute, Chinese Academy of Agricultural Science, 9 Meiling South Road, Xihu District, Hangzhou 310008, China
- Key Laboratory of Tea Biology and Resource Utilization, Ministry of Agriculture, 9 Meiling South Road, Xihu District, Hangzhou 310008, China
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Bodnár D, Koczor S, Tarcali G, Tóth M, Ott PG, Tholt G. Cacopsyllapruni (Hemiptera, Psyllidae) in an apricot orchard is more attracted to white sticky traps dependent on host phenology. Biodivers Data J 2022; 10:e93612. [PMID: 36761527 PMCID: PMC9836614 DOI: 10.3897/bdj.10.e93612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 10/20/2022] [Indexed: 11/17/2022] Open
Abstract
The colour preference of the plum psyllid, Cacopsyllapruni (Hemiptera, Psyllidae), is yet poorly studied. This species is the only known vector of the 'Candidatus Phytoplasma prunorum', the agent of European stone fruit yellows (ESFY), a devastating disease of several cultivated Prunus species in Europe. As ESFY is still uncurable, vector control, thus vector monitoring, is pivotal to protect these trees. Cacopsyllapruni is a univoltine, host-shelter-alternating species; overwintered adults migrate from conifer to wild or cultivated Prunus species (family Rosaceae) in late winter-early spring. To select the most effective colour indicating the arrivals of the immigrants, yellow, fluorescent yellow, white, red and transparent sticky traps were deployed in an apricot orchard in Hungary. The two most abundant species in sticky traps were C.pruni and C.melanoneura. Catches of white traps were significantly biased towards C.pruni as compared to C.melanoneura specimens. Moreover, white sticky traps were better at catching plum psyllids than the other colours. Attraction to white was strongest when immigrants from shelter plants kept arriving in the orchard, coinciding with the blooming principal phenophase of apricot trees. When the host flowering growth stage was over, catches of C.pruni in white traps declined sharply to the level of yellow traps that was highest during this post-blooming period. We recommended white sticky traps for promptly monitoring C.pruni in apricot orchards because it is more potent and more selective than yellow ones during the critically important early flowering interval.
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Affiliation(s)
- Dominika Bodnár
- Centre of Agricultural Research, Department of Pathophysiology, Budapest, HungaryCentre of Agricultural Research, Department of PathophysiologyBudapestHungary
| | - Sándor Koczor
- Centre of Agricultural Research, Department of Applied Chemical Ecology, Budapest, HungaryCentre of Agricultural Research, Department of Applied Chemical EcologyBudapestHungary
| | - Gábor Tarcali
- University of Debrecen, Faculty of Agricultural and Food Sciences and Environmental Management, Institute of Plant Protection, Debrecen, HungaryUniversity of Debrecen, Faculty of Agricultural and Food Sciences and Environmental Management, Institute of Plant ProtectionDebrecenHungary
| | - Miklós Tóth
- Centre of Agricultural Research, Department of Applied Chemical Ecology, Budapest, HungaryCentre of Agricultural Research, Department of Applied Chemical EcologyBudapestHungary
| | - Péter G. Ott
- Centre of Agricultural Research, Department of Pathophysiology, Budapest, HungaryCentre of Agricultural Research, Department of PathophysiologyBudapestHungary
| | - Gergely Tholt
- Centre of Agricultural Research, Department of Zoology, Budapest, HungaryCentre of Agricultural Research, Department of ZoologyBudapestHungary
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