Publications by authors named "Tamryn Marsberg"

Article Synopsis
  • A systems approach was created to replace traditional quarantine methods for treating Thaumatotibia leucotreta in South African citrus exports, involving pre and postharvest controls, postpacking inspections, and low-temperature exposure.
  • Trials tested the effectiveness of seven cold temperatures (0-5°C) for 14 to 26 days, finding that temperatures of 0, 1, 2, and 3°C could achieve 100% mortality in the pest after specific durations.
  • Efficacy varied significantly among different temperatures, with lower temperatures leading to higher mortality rates, suggesting that a combination of cold treatments and other preventive measures can be effective while minimizing fruit damage.
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The genetic diversity of baculoviruses provides a sustainable agronomic solution when resistance to biopesticides seems to be on the rise. This genetic diversity promotes insect infection by several genotypes (i.e.

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Cydia pomonella granulovirus (CpGV) is a cornerstone of codling moth () control in integrated and organic pome fruit production, though different types of resistance to CpGV products have been recorded in codling moth field populations in Europe for several years. Recently, a novel baculovirus named Cryptophlebia peltastica nucleopolyhedrovirus (CrpeNPV) was isolated from a laboratory culture of the litchi moth, , in South Africa. Along with CpGV, it is the third known baculovirus that is infectious to codling moth.

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The litchi moth, Cryptophlebia peltastica (Meyrick) (Lepidoptera: Tortricidae), is endemic to sub-Saharan Africa and certain Indian Ocean islands. It is an important pest of litchis and to a lesser extent macadamias. Litchis are exported to certain markets that consider C.

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Cryptophlebia peltastica is an agricultural pest of litchis and macadamias in South Africa with phytosanitary status for certain markets. Current control methods rely on chemical, cultural and classical biological control. However, a microbial control option has not been developed.

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