scholarly journals Limited host range in the idiobiont parasitoid Phymasticus coffea, a prospective biological control agent of the coffee pest Hypothenemus hampei in Hawaii

2021 ◽  
Author(s):  
Fazila Yousuf ◽  
Peter A. Follett ◽  
Conrad P. D. T. Gillett ◽  
David Honsberger ◽  
Lourdes Chamorro ◽  
...  
Keyword(s):  
Biological Control ◽  
Native Species ◽  
Biological Control Agent ◽  
Classical Biological Control ◽  
Environmental Safety ◽  
Control Agent ◽  
Hypothenemus Hampei ◽  
Parasitism Rate ◽  
Limited Host Range ◽  
Parasitoid Development

AbstractPhymastichus coffea LaSalle (Hymenoptera:Eulophidae) is an adult endoparasitoid of the coffee berry borer, Hypothenemus hampei (Ferrari) (Coleoptera:Curculionidae:Scolytinae), which has been introduced in many coffee producing countries as a biological control agent. To determine the effectiveness of P. coffea against H. hampei and environmental safety for release in Hawaii, we investigated the host selection and parasitism response of adult females to 43 different species of Coleoptera, including 23 Scolytinae (six Hypothenemus species and 17 others), and four additional Curculionidae. Non-target testing included Hawaiian endemic, exotic and beneficial coleopteran species. Using a no-choice laboratory bioassay, we demonstrated that P. coffea was only able to parasitize the target host H. hampei and four other adventive species of Hypothenemus: H. obscurus, H. seriatus, H. birmanus and H. crudiae. Hypothenemus hampei had the highest parasitism rate and shortest parasitoid development time of the five parasitized Hypothenemus spp. Parasitism and parasitoid emergence decreased with decreasing phylogenetic relatedness of the Hypothenemus spp. to H. hampei, and the most distantly related species, H. eruditus, was not parasitized. These results suggest that the risk of harmful non-target impacts is low because there are no native species of Hypothenemus in Hawaii, and P. coffea could be safely introduced for classical biological control of H. hampei in Hawaii.

scholarly journals Field demonstration of a semiochemical treatment that enhances Diorhabda carinulata biological control of Tamarix spp.

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Alexander M. Gaffke ◽  
Sharlene E. Sing ◽  
Tom L. Dudley ◽  
Daniel W. Bean ◽  
Justin A. Russak ◽  
...  
Keyword(s):  
Biological Control ◽  
Aggregation Pheromone ◽  
Biological Control Agent ◽  
Adult Emergence ◽  
Classical Biological Control ◽  
The United States ◽  
Control Agent ◽  
Weed Biological Control ◽  
Single Well ◽  
Tamarix Spp

Abstract The northern tamarisk beetle Diorhabda carinulata (Desbrochers) was approved for release in the United States for classical biological control of a complex of invasive saltcedar species and their hybrids (Tamarix spp.). An aggregation pheromone used by D. carinulata to locate conspecifics is fundamental to colonization and reproductive success. A specialized matrix formulated for controlled release of this aggregation pheromone was developed as a lure to manipulate adult densities in the field. One application of the lure at onset of adult emergence for each generation provided long term attraction and retention of D. carinulata adults on treated Tamarix spp. plants. Treated plants exhibited greater levels of defoliation, dieback and canopy reduction. Application of a single, well-timed aggregation pheromone treatment per generation increased the efficacy of this classical weed biological control agent.

Biological traits and the complex of parasitoids of the elm pest Orchestes steppensis (Coleoptera: Curculionidae) in Xinjiang, China

2017 ◽  
Vol 108 (1) ◽  
pp. 48-57 ◽  
Author(s):  
Q. Li ◽  
S.V. Triapitsyn ◽  
C. Wang ◽  
W. Zhong ◽  
H.-Y. Hu
Keyword(s):  
Biological Control ◽  
Invasive Species ◽  
Natural Enemies ◽  
Biological Control Agent ◽  
Control Program ◽  
Classical Biological Control ◽  
Field Investigation ◽  
Control Agent ◽  
Current Control ◽  
Biological Traits

AbstractThe flee-weevil Orchestes steppensis Korotyaev (Coleoptera: Curculionidae) is a steppe eastern Palaearctic species, notable as a serious pest of elms (Ulmus spp., Ulmaceae), by feeding on the leaves (adults) or mining them heavily (larvae), especially of Ulmus pumila L. in Xinjiang, China. We have corrected the previous misidentifications of this weevil in China as O. alni (L.) or O. mutabilis Boheman and demonstrated that it is likely to be an invasive species in Xinjiang. Prior to this study, natural enemies of O. steppensis were unknown in Xinjiang. Resulting from field investigation and rearing in the laboratory during 2013–2016, seven parasitoid species were found to be primary and solitary, attacking larval and pupal stages of the host weevil. Pteromalus sp. 2 is the dominant species and also is the most competitive among the seven parasitoids, which could considered to be a perspective biological control agent of O. steppensis. Yet, the current control of this pest by the local natural enemies in Xinjiang is still currently inefficient, even though in 2016 parasitism was about 36% on U. pumila in Urumqi, so the potential for a classical biological control program against it needs to be further investigated, including an assessment of its parasitoids and other natural enemies in the native range of O. steppensis. The presented information on the natural enemies of this weevil can be also important for a potential classical biological control program against it in North America (Canada and USA), where it is a highly damaging and rapidly spreading invasive species.

Population regulation of a classical biological control agent larval density dependence inNeochetina eichhorniaeColeoptera Curculionidae, a biological control agent of water hyacinthEichhornia crassipes

2006 ◽  
Vol 96 (2) ◽  
pp. 145-152 ◽  
Author(s):  
J.R.U. Wilson ◽  
M. Rees ◽  
O. Ajuonu
Keyword(s):  
Biological Control ◽  
Density Dependence ◽  
Water Hyacinth ◽  
Biological Control Agent ◽  
Larval Density ◽  
Nutrient Status ◽  
Classical Biological Control ◽  
Control Agent ◽  
Control Measures ◽  
Nutrient Concentrations

AbstractThe release of classical biological control agents has reduced the economic, environmental and social problems caused by water hyacinth,Eichhornia crassipes; however, additional control measures are needed in some locations. Water hyacinth plants were treated with different densities of eggs of the weevilNeochetina eichhorniaeWarner, one of the main control agents, under different nutrient regimes in a controlled experiment. Plants were destructively sampled and the development ofN. eichhorniaewas assessed. The survival of first and second instars declined as larval density increased. Plant nutrient status did not directly affect the mortality rate of larvae, but at higher nutrient concentrations larvae developed faster and were larger at a given developmental stage. It is argued that the density dependence operating inN. eichhorniaeoccurs through an interaction between young larvae and leaf longevity. Consequently, events which disrupt water hyacinth leaf dynamics, e.g. frost or foliar herbicides, will have a disproportionately large effect on the control agents and may reduce the level of control of the host.

Resource regulation of an invasive tree by a classical biological control agent

2015 ◽  
Vol 85 ◽  
pp. 12-17 ◽  
Author(s):  
Philip W. Tipping ◽  
Melissa R. Martin ◽  
Paul D. Pratt ◽  
M.B. Rayamajhi ◽  
L.A. Gettys
Keyword(s):  
Biological Control ◽  
Biological Control Agent ◽  
Classical Biological Control ◽  
Control Agent ◽  
Invasive Tree

A new genus and species of Tetrastichinae (Hymenoptera: Eulophidae) parasitic on the coffee berry borer, Hypothenemus hampei (Ferrari) (Coleoptera: Scolytidae)

1990 ◽  
Vol 80 (1) ◽  
pp. 7-10 ◽  
Author(s):  
John LaSalle
Keyword(s):  
Biological Control ◽  
New Genus ◽  
Biological Control Agent ◽  
Control Agent ◽  
Hypothenemus Hampei ◽  
New Genus And Species ◽  
Coffee Berry ◽  
Coffee Berry Borer

AbstractPhymastichus coffea, a new genus and species of tetrastichine Eulophidae, is described. This species is parasitic on the coffee berry borer, Hypothenemus hampei (Ferrari), in Africa and is currently under investigation as a possible biological control agent for this borer

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