Managing The Greenhouse, Crop and Crop Environment

Berlinger, Menachem J.; Jarvis, William R.; Jewett, Tom J.; Lebiush-Mordechi, Sara

doi:10.1007/0-306-47585-5_8

Cited by 14 publications

(6 citation statements)

References 74 publications

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“…Greenhouse culture is somewhat protected from external environmental contamination, but doorways and vents are entry points for pathogens. Positive 145 pressure air flow is sometimes used to minimize entry of airborne propagules, and footbaths are filled with disinfectant at entrances to reduce soil entry (19). Soil particles in the greenhouse moved by grower activity may be a source of Pythium or Rhizoctonia (152).…”

Section: Sanitationmentioning

confidence: 99%

“…The risks and benefits of chemical application need to be weighed in each situation. In addition to the cost of chemical treatment, there are sometimes negative side effects of pesticide use: stress, resistance problems, interference with biocontrol, or an increase in diseases normally held in check by naturally occurring antagonistic microflora (19). Certain fungicide treatments on healthy plants may have a negative effect on plant growth, and possibly increase the length of time to bring the crop into flower (73).…”

Section: Daughtrey Bensonmentioning

confidence: 99%

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Principles of Plant Health Management for Ornamental Plants

Daughtrey

Benson

2005

Annu. Rev. Phytopathol.

129

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Economic, environmental, and technological influences complicate the task of achieving disease-free products in the ornamentals industry. Integrated pest management (IPM) is a cornerstone of floriculture and nursery crop production: strategies include sanitation, clean stock, host resistance, and control through biological, cultural, environmental, chemical, and regulatory means. Sanitation measures and cultural controls must keep pace with new production technologies. Clean stock programs are used for many crops that are propagated vegetatively. Breeding, selection, and biotechnology provide crops resistant to pathogens. Offshore production for economic competitiveness can introduce pathogens that make regulatory programs necessary. New biocontrol and chemical products continue to improve control while meeting the requirement for minimal environmental impact. Continual introduction of new crops and new production technologies creates new opportunities for pathogens to exploit, such that new disease management tactics must be discovered and old ones rediscovered to achieve optimum health management for ornamentals.

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Section: Sanitationmentioning

confidence: 99%

Section: Daughtrey Bensonmentioning

confidence: 99%

Principles of Plant Health Management for Ornamental Plants

Daughtrey

Benson

2005

Annu. Rev. Phytopathol.

129

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“…In addition, under glasshouse conditions, rapid increases in arthropod pest populations may be exacerbated by absence (unless released as part of biological control programs) of natural enemies . Arthropod pest management is therefore a major component of glasshouse operations . Irrespectively of whether biological control programs are in place or not, the favorable abiotic conditions imply that glasshouse pest management must include frequent and reliable monitoring to detect and diagnose emerging arthropod pest outbreaks.…”

Section: Introductionmentioning

confidence: 99%

Hyperspectral remote sensing to detect leafminer‐induced stress in bok choy and spinach according to fertilizer regime and timing

Nguyen

Nansen

2020

Pest Management Science

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BACKGROUND: Detection and diagnosis of emerging arthropod outbreaks in horticultural glasshouse crops, such as bok choy and spinach, is both important and challenging. A major challenge is to accurately detect and diagnose arthropod outbreaks in growing crops (changes in canopy size, structure, and composition), and when crops are grown under three fertilization regimes. Day-time remote sensing inside glasshouses is highly sensitive to inconsistent lighting, spectral scattering, and shadows casted by glasshouse structures. To avoid these issues, a unique feature of this study was that hyperspectral remote sensing data were acquired after sunset with an active light source. As part of this study, we describe a comprehensive approach to performance assessment of classification algorithms based on hyperspectral remote sensing data.RESULTS: Based on average hyperspectral remote sensing profiles from individual crop plants, none of the 31 individual spectral bands showed consistent significant response to leafminer infestation and non-significant response to fertilizer regime. Multi-band classification algorithms were subjected to a comprehensive performance assessment to quantify risks of model over-fitting and low repeatability of classification algorithms. The performance assessment of classification algorithms addresses the important 'bias-variance trade-off'. Truly independent validation (training and validation data sets being separated over time) revealed that leafminer infestation could be detected with >99% accuracy in both bok choy and spinach.CONCLUSION: We conclude that detailed hyperspectral profiles (not single spectral bands) can accurately detect and diagnose leafminer infestation over time and across fertilizer regimes. Hyperspectral remote sensing data acquisition at night with an active light source has the potential to enable arthropod infestations in glasshouse-grown crops, such as, bok choy and spinach. In addition, we conclude that effective use and deployment of hyperspectral remote sensing requires thorough performance assessments of classification algorithms, and we propose an analytical performance method to address this important matter.

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“…In addition, glasshouse systems may afford some level of protection from pests, limiting access to the crop through creation of a physical barrier to inward pest movement that may be fortified through screening with appropriate mesh sizes [ 2 ]. Even with screening in place, however, pest penetration is often significant [ 3 ] and supplementary control measures are typically required [ 4 ]. Indeed, the artificial system created, with controlled and buffered temperature and humidity and without wind and rain, exacerbates pest problems where they do occur by providing relatively optimal conditions for pest population growth [ 3 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

“…Even with screening in place, however, pest penetration is often significant [ 3 ] and supplementary control measures are typically required [ 4 ]. Indeed, the artificial system created, with controlled and buffered temperature and humidity and without wind and rain, exacerbates pest problems where they do occur by providing relatively optimal conditions for pest population growth [ 3 , 5 ].…”

Section: Introductionmentioning

confidence: 99%

Identification of Novel Pesticides for Use against Glasshouse Invertebrate Pests in UK Tomatoes and Peppers

George

Banfield‐Zanin

Collier³

et al. 2015

Insects

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To inform current and future pesticide availability to glasshouse vegetable growers, the current project trialled more than twenty products, including existing industry standards, against four key pests of glasshouse tomatoes and bell peppers. These included experimental conventional chemical pesticides as well as alternative biopesticide and biorational products based on phytochemicals, microbials and physically-acting substances. The results suggest that certain biopesticide products, particularly botanicals, provide good levels of pest control, with the same being true of experimental conventional chemical pesticides not yet recommended for use against these pests on these crops. Efforts are on-going to ensure that results of the current project translate to industry benefit via new pesticide approvals.

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Managing The Greenhouse, Crop and Crop Environment

Cited by 14 publications

References 74 publications

Principles of Plant Health Management for Ornamental Plants

Principles of Plant Health Management for Ornamental Plants

Hyperspectral remote sensing to detect leafminer‐induced stress in bok choy and spinach according to fertilizer regime and timing

Identification of Novel Pesticides for Use against Glasshouse Invertebrate Pests in UK Tomatoes and Peppers

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