Development and Mortality of the Citrus Snow Scale (Homoptera: Diaspididae) Under Constant Temperature and Relative Humidity

Arias-Reverón, Julio; Browning, H. W.

doi:10.1093/ee/24.5.1189

Cited by 5 publications

(5 citation statements)

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“…In central Florida citrus groves, average daily mean temperature during the summer was 29°C and mean maximum temperature during the same period was 37°C (Arias-Reveron and Browning 1995). This suggests that P. asetus is very well adapted to these extremes.…”

Section: Model Developmentmentioning

confidence: 97%

Effects of contrasting diets and temperatures on reproduction and prey consumption by Proprioseiopsis asetus (Acari: Phytoseiidae)

et al. 2008

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Proprioseiopsis asetus (Chant) (Acari: Phytoseiidae) is a relatively unknown predacious mite with potential as a biological control agent of Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae) and Tetranychus urticae Koch (Acari: Tetranychidae). In this study, the developmental rate and other biological parameters of P. asetus were investigated. Development of P. asetus was temperature dependent from 10 to 40 degrees C. Nonlinear models were fitted to development rate (1/time) data from egg to adult and by sex to estimate development times. The model of Sharpe and De Michele (1977) best fits the developmental data. The shortest development time on cattail (Typha latifolia (L.)) pollen occurred at 35 degrees C for all stages except for the egg stage, for which it was longer. The optimum development time at 35 degrees C is above the temperature optimum of most phytoseiid mites. Fecundity increased when P. asetus mated more than once. Males were needed at all times for maximum oviposition, although their consumption was negligible. Oviposition, prey killed (Franklinella occidentalis or T. urticae) and longevity of P. asetus females were recorded in the presence of males. Egg production increased with number of prey killed and P. asetus has the characteristics of successful predators of thrips.

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Section: Model Developmentmentioning

confidence: 97%

Effects of contrasting diets and temperatures on reproduction and prey consumption by Proprioseiopsis asetus (Acari: Phytoseiidae)

et al. 2008

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“…Infestation begins on the trunk and quickly spreads to branches and twigs (EPPO, ; Buckley and Hodges, ). Sticky cards can be used to detect crawlers, adult males and U. citri adult parasitoids (Arias‐Reverón and Browning, ).…”

Section: Pest Categorisationmentioning

confidence: 99%

“…They are dispersed mainly by wind, but also on farm machinery, clothing and plants (Smith et al., ). Optimal temperatures for development range between 25°C and 38°C and developmental thresholds are set at 12°C, with no differences in developmental time between sexes (Arias‐Reverón and Browning, ). The life cycle takes about 8 weeks in summer (Miller and Davidson, ) and, in citrus, there is a variable number of generations per year depending on latitude (García Morales et al., ).…”

Section: Pest Categorisationmentioning

confidence: 99%

Pest categorisation of Unaspis citri

Jeger¹,

Bragard²,

Caffier³

et al. 2018

EFS2

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The Panel on Plant Health performed a pest categorisation of the citrus snow scale, Unaspis citri (Comstock) (Hemiptera: Diaspididae), for the European Union (EU). This is a well‐defined and distinguishable species, native to south‐eastern Asia, which has spread to many tropical and subtropical regions. U. citri can be a pest of citrus and has been cited on over 28 different species in 16 plant families. In the EU, U. citri occurs in the Azores. There is uncertainty as to whether it occurs in continental Portugal. Reports of it occurring in Greece and Spain are likely to be invalid and based on interception records from these countries. An old Italian record is a misidentification. U. citri is listed in Annex IIAI of 2000/29/EC as a harmful organism. The international trade of hosts, as either plants for planting, fruit or cut flowers, provide potential pathways into the EU. However, current EU legislation prohibits the import of citrus plants for planting from third countries. U. citri is mostly confined to coastal humid tropical areas and does not occur in semi‐arid areas that are irrigated. Nevertheless, given that it occurs in the Azores and that there are regional climatic similarities between places where U. citri occurs and climates within the EU, and taking EU host distribution into account, U. citri has the potential to establish in the EU, especially in citrus‐growing regions around the Mediterranean where losses in quality and yield of citrus could occur. Phytosanitary measures are available to inhibit the likelihood of introduction of U. citri. Considering the criteria within the remit of EFSA to assess the status as a potential Union quarantine pest (QP), or as a potential regulated non‐quarantine pest (RNQP), U. citri meets the criteria assessed by EFSA for consideration as a potential Union QP.

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“…Most models have been designed for speci fi c applications including the prediction of potential crop damage caused by citrus pathogens (Timmer and Zitko 1996 ) or scale insects (Arias-Reveron and Browning 1995 ) . Other citrus models have been used for irrigation scheduling (Xin et al 1997 ) , and predicting time of fl owering (Bellows and Morse 1986 ).…”

Section: Modeling Approachesmentioning

confidence: 99%

Nutrient Use Efficiency in Citrus

Scholberg

Morgan

2012

Advances in Citrus Nutrition

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During the past decades, commercial citrus producers throughout the world have been facing serious challenges including restrictions on water, fertilizer and agrochemical use, potential treats of devastating diseases, and fi erce competitions for global markets. In an era of increased focus on sustainable development, smart technologies, and resource conservation, there has been gradual shift from increasing yield and maximizing pro fi ts to making better use of technical innovations to ensure more ef fi cient use of fi nite resources including land, energy, water, and nutrients. Within this context, it is relevant for scientists to critically re fl ect on how to effectively integrate information related to physiological processes, pedoclimatic conditions, and management practices to increase nutrient use ef fi ciency (NUE) in citrus production systems. Understanding the processes controlling nutrient uptake is critical for development of management practices that enhance NUE while reducing nutrient losses and potential environmental impacts. However, one of the Abstract Citrus production systems are inherently complex, which may hamper ef fi cient resource management. This chapter aims to use a systems approach for structuring more ef fi cient management options for citrus production. It starts by providing a brief overview of production trends in major production regions and outlining the use of a systems-based approach for structuring more sustainable management practices. Starting with the physiological processes and mechanisms controlling nutrient uptake of young seedlings, resource capture and utilization are presented including root growth dynamics and nutrient interception capacity as affected by diurnal crop water use, temperature, and nutrient supply. Uptake processes are scaled-up to a tree level and linked to speci fi c environmental, crop development, and management aspects and integrated into generic conceptual models with special reference to the interactive effects of irrigation and fertility management as related to crop nutrient interception capacity. Then the scope is expanded to look at nutrient management at the fi eld level on an annual basis including tree nutrient allocation, environmental emissions, and development of annual nutrient budgets. In the fi nal section, future perspectives are provided for more effective use of modeling approaches for system design and more costeffective and sustainable resource use. KeywordsNutrient use ef fi ciency • Systems analysis • System design • Resource management • Modeling approaches

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Development and Mortality of the Citrus Snow Scale (Homoptera: Diaspididae) Under Constant Temperature and Relative Humidity

Cited by 5 publications

References 0 publications

Effects of contrasting diets and temperatures on reproduction and prey consumption by Proprioseiopsis asetus (Acari: Phytoseiidae)

Effects of contrasting diets and temperatures on reproduction and prey consumption by Proprioseiopsis asetus (Acari: Phytoseiidae)

Pest categorisation of Unaspis citri

Nutrient Use Efficiency in Citrus

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