Smart-use of fertilizers to manage spider mites (Acari: Tetrachynidae) and other arthropod pests

West, Katrina; Nansen, Christian

doi:10.14719/pst.2014.1.3.56

Cited by 7 publications

(6 citation statements)

References 27 publications

(41 reference statements)

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“…Potassium deficiency can lead to limited growth, metabolism, and stress defense (Wang et al, 2013). Plants that have potassium deficiencies are more susceptible to pest damage (Wang et al, 2013; West & Nansen, 2014). Our results show that organic GC enhances available potassium in peach orchards boosting the crop defense against pests.…”

Section: Discussionmentioning

confidence: 99%

Ecosystem services of organic versus inorganic ground cover in peach orchards: A meta‐analysis

Mudare

Kanomanyanga

et al. 2023

Food and Energy Security

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Several organic (e.g., compost, hay, straw, grass) and inorganic (e.g., plastic film) ground cover (GC) forms are used in peach orchards worldwide. Yet, there is a lack of quantitative studies on peach orchard ecosystem services comprising fruit yields and quality, soil health indicators, and biological pest control.To fill this knowledge gap, we performed a meta-analysis of 55 peer-reviewed research. Overall, inorganic GC increased peach yields by 7.7 ± 1.8%, while organic GC reduced it, though not statistically significant (p > 0.05), by 1.7 ± 3%.Both forms of GC have enhanced single fruit mass, with a greater increase in inorganic (4.2 ± 1.7%) than in organic GC (1.2 ± 1.2%), and soluble solids content by 5.9 ± 0.9% and 3.2 ± 0.7%, respectively. Inorganic GC did not significantly affect titratable acid and fruit hardness, while organic GC reduced titratable acid (13.7 ± 2.1%), and fruit hardness (89 ± 2.9%). Soil temperature has increased in orchards with inorganic GC (2.8 ± 2.9%) and reduced with organic GC (8.3 ± 2.4%).Inorganic GC marginally increased soil water storage, while organic GC increased it by 9.3 ± 2.1%. Both organic and inorganic GC increased soil water content by 13.1 ± 2.4% and 26.1 ± 3.4%, respectively. Unlike inorganic GC, organic GC increased soil organic matter, available nitrogen, available phosphorus, and available potassium by 28.3 ± 3.3%, 25.1 ± 2.7%, 23.5 ± 4.6%, and 30.9 ± 3.3%, respectively. Equally significantly, organic GC increased predator abundance (47.5 ± 5.9%) and reduced pest incidence (2.4 ± 1.8%). Overall, inorganic GC systems slightly increased peach yield but are not sustainable due to their negative soil health and environmental impacts. In contrast, organic GC systems delivered an acceptable yield level while providing numerous ecosystem services, enabling sustainable long-term peach production.

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Section: Discussionmentioning

confidence: 99%

Ecosystem services of organic versus inorganic ground cover in peach orchards: A meta‐analysis

Mudare

Kanomanyanga

et al. 2023

Food and Energy Security

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“…Plants deficient in K exhibit limited growth, metabolism and stress defence (Wang et al 2013) which leads to lower yield and quality of grain and hay. Due to these factors, there is growing scientific support that K-deficiency in plants allows for increased performance of herbivorous arthropods (Wang et al 2013;West and Nansen 2014) which further stresses plants and diminishes yields and quality. Information regarding the effects of K-deficiency on the performance of economically important arthropod pests would benefit agricultural production specialists by emphasizing the importance of K nutrition, not just for optimal growth but also for plant defence against key arthropod pests and diseases.…”

Section: Introductionmentioning

confidence: 99%

Unmanned aerial vehicle canopy reflectance data detects potassium deficiency and green peach aphid susceptibility in canola

et al. 2016

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There is growing evidence that potassium deficiency in crop plants increases their susceptibility to herbivorous arthropods. The ability to remotely detect potassium deficiency in plants would be advantageous in targeting arthropod sampling and spatially optimizing potassium fertilizer to reduce yield loss due to the arthropod infestations. Four potassium fertilizer regimes were established in field plots of canola, with soil and plant nutrient concentrations tested on three occasions: 69 (seedling), 96 (stem elongation), and 113 (early flowering) days after sowing (DAS). On these dates, unmanned aerial vehicle (UAV) multi-spectral images of each plot were acquired at 15 and 120 m above ground achieving spatial (pixel) resolutions of 8.1 and 65 mm, respectively. At 69 and 96 DAS, field plants were transported to a laboratory with controlled lighting and imaged with a 240-band (390-890 nm) hyperspectral camera. At 113 DAS, all plots had become naturally infested with green peach aphids (Hemiptera: Aphididae), and intensive aphid counts were conducted. Potassium deficiency caused significant: (1) increase in concentrations of nitrogen in youngest mature leaves, (2) increase in green peach aphid density, (3) decrease in vegetation cover, (4) decrease in normalized difference vegetation indices (NDVI) and decrease in canola seed yield. UAV imagery with 65 mm spatial resolution showed higher & Dustin Severtson classification accuracy (72-100 %) than airborne imagery with 8 mm resolution (69-94 %), and bench top hyperspectral imagery acquired from field plants in laboratory conditions (78-88 %). When non-leaf pixels were removed from the UAV data, classification accuracies increased for 8 mm and 65 mm resolution images acquired 96 and 113 DAS. The study supports findings that UAV-acquired imagery has potential to identify regions containing nutrient deficiency and likely increased arthropod performance.

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“…It is possible that these changes in nutrient concentration were coincidental to the aphid preference, as there are other factors, including soluble carbohydrates and amino acids, which have also been linked to aphid performance (Hu et al 2014). Although the direct link between these elements and aphid preference and performance were not established in this work, numerous studies have demonstrated the importance of potassium regarding pest infestations of crops (West and Nansen 2014 analysis and showed that, among the main nutritional elements, leaf potassium content showed the strongest negative correlation with spider mite (Acari: Tetranychidae) bio-response. This result is corroborated by a review of >2,000 studies regarding effects of potassium on pest and disease incidence in plants, in which Perrenoud (1990) found that in 63% of these studies, application of potassium led to a decrease in pest pressure.…”

Section: Discussionmentioning

confidence: 81%

Increased Susceptibility to Aphids of Flowering Wheat Plants Exposed to Low Temperatures

Lacoste

Nansen

Thompson

et al. 2015

Environmental Entomology

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Smart-use of fertilizers to manage spider mites (Acari: Tetrachynidae) and other arthropod pests

Cited by 7 publications

References 27 publications

Ecosystem services of organic versus inorganic ground cover in peach orchards: A meta‐analysis

Ecosystem services of organic versus inorganic ground cover in peach orchards: A meta‐analysis

Unmanned aerial vehicle canopy reflectance data detects potassium deficiency and green peach aphid susceptibility in canola

Increased Susceptibility to Aphids of Flowering Wheat Plants Exposed to Low Temperatures

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