Impact of herbivory by Hydrellia pakistanae (Diptera: Ephydridae) on growth and photosynthetic potential of Hydrilla verticillata

Doyle, Robert D.; Grodowitz, Michael J.; Smart, R. M.; Owens, Chetta S.

doi:10.1016/s1049-9644(02)00024-5

Cited by 41 publications

(23 citation statements)

References 13 publications

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“…These chewing insects eat leaves, flowers, buds and twigs. They can seriously damage foliage, reducing plant fitness (Hochwender et al, 2003) and regenerative capacity (Howe, 1990), and also affecting photosynthesis and plant growth (Doyle et al, 2002). In addition, some Diptera and Hymenoptera can also affect leaves producing galls.…”

Section: Introductionmentioning

confidence: 99%

Relationship Between Insect Damage and Chlorophyll Content in Mediterranean Oak Species

Cárdenas¹,

Gallardo²

2016

Appl Ecol Env Res

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Abstract.Considering that the damage caused by phytophagous insects can alter the chlorophyll content of plants, we established the hypothesis that variations in chlorophyll concentration could be applied to assess stress caused by these kind of harmful agents. In this paper, relationship between insect damage and the chlorophyll content of sclerophyllous oak species (Quercus suber and Q. ilex) is investigated. The survey was carried out in Hornachuelos Natural Park (southern Iberian Peninsula). For each plant species, a comparative study of chlorophyll concentration on healthy leaves was performed among a control group of harmless trees and other groups affected by one of the following damaging insects: woodborers, chewing and gall-formers. Results relative to Q. ilex indicated that only damage by gall-formers had a significant effect on average chlorophyll content of healthy leaves. As regard Q. suber, differences in chlorophyll content were only significant when injuries were caused by the woodborer Coraebus florentinus. In conclusion, insect damage could influence the chlorophyll content of the holm and cork oaks, but the effect varies depending on the plant species and the type of harmful agent.

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Section: Introductionmentioning

confidence: 99%

Relationship Between Insect Damage and Chlorophyll Content in Mediterranean Oak Species

Cárdenas¹,

Gallardo²

2016

Appl Ecol Env Res

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“…Leaf-mining Hydrellia flies damage their host plants by reducing the leaf surface area for photosynthesis (Doyle et al 2002) and therefore the potential for carbon acquisition. This causes an associated reduction in plant growth and vigour and overall competitive ability (Van et al 1998;Doyle et al 2007).…”

Section: Discussionmentioning

confidence: 99%

“…This causes an associated reduction in plant growth and vigour and overall competitive ability (Van et al 1998;Doyle et al 2007). Herbivory by H. pakistanae reduced tuber production and biomass accumulation of H. verticillata, which was proportional to the amount of leaf damage (Doyle et al 2002). This type of damage, coupled with favourable attributes such as a short life cycle, multi-voltinism, overlapping generations, exponential growth rates, and possibly good dispersal abilities, such as demonstrated by H. pakistanae (Center et al 1997), suggest Hydrellia sp.…”

Section: Discussionmentioning

confidence: 99%

Suitability of a leaf-mining fly, Hydrellia sp., for biological control of the invasive aquatic weed, Hydrilla verticillata in South Africa

Bownes

2014

BioControl

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South Africa developed its first biological control programme for a submerged aquatic weed following the discovery of Hydrilla verticillata (L.f.) Royle (Hydrocharitaceae) in a major tourism dam in 2006. A leaf-mining fly, Hydrellia sp. (Diptera: Ephydridae) from Singapore, originating on a closely related biotype of the weed invading South Africa, was considered a priority candidate agent. Host range was investigated through no-choice and paired-choice larval development trials. ''Host suitability'' trials (multiple generations and performance) were used to further evaluate the potential for non-target host use by the fly. Hydrellia sp. developed on a few closely related species in the Hydrocharitaceae and one species in the Potamogetonaceae. However, pairedchoice tests demonstrated a strong preference for its host plant and the host suitability trials indicated that Hydrellia sp. has very limited potential to establish permanent populations on native aquatic plant species. Hydrellia sp. should therefore be considered safe for release in South Africa.

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“…Insect herbivory in the aquatic environment has been shown to slow plant growth, reduce viability of plant fragments (Owens et al 2006), and reduce winter bud formation (Wallace and O'Hop 1985;Doyle et al 2002Doyle et al , 2005. These facts have been exploited for years by practitioners of aquatic weed biocontrol in which native herbivores aid in successful plant management (Coombs et al 2004).…”

Section: Introductionmentioning

confidence: 99%

Insect herbivores of water stargrass (Heteranthera dubia) in the US

Harms¹,

Grodowitz²,

Kennedy³

2011

Journal of Freshwater Ecology

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We examined insect herbivores associated with Heteranthera dubia from surveys conducted from 2006 to 2009. Plants were collected, invertebrates were removed, and signs of feeding damage were noted. Herbivores were quantified, and geographic regions were compared based on herbivore density, taxa richness, evenness, and diversity. The greatest density of herbivores occurred at Parker Pond, Washington, which was largely influenced by an abundance of aphids (Rhopalosiphum spp.). Density, richness, and evenness were not significantly different among regions. At least 23 potential insect herbivores were recorded from 15 sites in Texas, Washington, Minnesota, Wisconsin, Vermont, and New York. Of these, five taxa were collected from the order Lepidoptera, one from Coleoptera, six from Diptera, and at least 11 from Trichoptera. The majority of the herbivores were generalists; several had unknown diets. Damage observed to H. dubia included extensive tunneling in the stems of the plant and, in some cases, substantial chewing damage to the leaves.

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Impact of herbivory by Hydrellia pakistanae (Diptera: Ephydridae) on growth and photosynthetic potential of Hydrilla verticillata

Cited by 41 publications

References 13 publications

Relationship Between Insect Damage and Chlorophyll Content in Mediterranean Oak Species

Relationship Between Insect Damage and Chlorophyll Content in Mediterranean Oak Species

Suitability of a leaf-mining fly, Hydrellia sp., for biological control of the invasive aquatic weed, Hydrilla verticillata in South Africa

Insect herbivores of water stargrass (Heteranthera dubia) in the US

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