Nutritional quality of Hydrilla verticillata (L.f.) Royle and its effects on a fungal pathogen Mycoleptodiscus terrestris (Gerd.) Ostazeski

Shearer, Judy F.; Grodowitz, Michael J.; McFarland, Dwilette G.

doi:10.1016/j.biocontrol.2007.02.003

Cited by 14 publications

(10 citation statements)

References 16 publications

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“…Roberts et al (1995) reported that common carp can directly consume Vallisneria, preferring it to H. verticillata. Also, H. verticillata has high rates of reproduction and growth (Shearer et al, 2007), which might compensate for any grazing losses. In addition, more biomass of H. verticillata is in a dense canopy distributed near the surface of water and thus less impacted by reduced light condition induced by carp activities.…”

Section: Discussionmentioning

confidence: 99%

Effects of common carp (Cyprinus carpio) on water quality in aquatic ecosystems dominated by submerged plants: a mesocosm study

Xiaochang

Mei

Razlutskij

et al. 2019

Knowl. Manag. Aquat. Ecosyst.

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Common carp (Cyprinus carpio) have been introduced into aquatic systems across the world, where their benthivorous feeding behavior has resulted in serious water quality problems. A 12-week mesocosm experiment was set up to test the hypotheses that common carp increase water column nutrient levels and decrease water clarity in aquatic ecosystems dominated by submerged plants. Further, we tested whether the effect of common carp on macrophytes depended on the species of plants. Relative to the controls, the presence of carp decreased water clarity by increasing total suspended solids (TSS) and light attenuation. However, levels of total nitrogen (TN) and total phosphorus (TP) in the water column were reduced. No significant change in phytoplankton biomass (measured as chlorophyll a) and the biomass of Hydrilla verticillata was observed between common carp treatment mesocosms and controls, but the common carp did reduce the biomass of the submerged macrophyte Vallisneria denseserrulata. We conclude that removal of common carp is likely to improve water clarity in aquatic ecosystems dominated by submerged plants primarily by decreasing TSS and that the effect of common carp on macrophytes is stronger for the meadow forming Vallisneria than for the canopy forming Hydrilla.

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Section: Discussionmentioning

confidence: 99%

Effects of common carp (Cyprinus carpio) on water quality in aquatic ecosystems dominated by submerged plants: a mesocosm study

Xiaochang

Mei

Razlutskij

et al. 2019

Knowl. Manag. Aquat. Ecosyst.

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“…Hydrilla plants of known nutritional composition were produced by growing them in used or fertilized sediments under different aeration conditions (high or low CO 2 ) using procedures described by Grodowitz and McFarland (2002) and Shearer et al (2007). The used sediment was rendered nitrogen-poor because of previous growth of submersed macrophytes.…”

Section: Plant Growthmentioning

confidence: 99%

“…Hydrilla apical shoots (5 cm) of variable nutritional compositions were placed in 250-ml Erlenmeyer flasks containing 150 ml sterile water and 20 µl wet inoculum. Inoculum was prepared as described by Shearer et al (2007). Control flasks received an additional 20 µl of sterile water.…”

Section: Pathogen Biological Control Agentmentioning

confidence: 99%

Nutritional characteristics of Hydrilla verticillata and its effect on two biological control agents.

Shearer¹,

Grodowitz²,

Freedman³

et al. 2008

Proceedings of the XII International Symposium on Biological Control of Weeds, La Grande Motte, France, 22-27 April, 2007

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A complex of abiotic and biotic factors is known to impact the establishment and success of biological control agents. Experiments using the ephydrid fly Hydrellia pakistanae Deonier have demonstrated that hydrilla, Hydrilla verticillata (L.f.) Royle, containing low protein content appears to impact larval development time and the number of eggs oviposited per female. Eggs per female were over twofold higher for larvae reared on hydrilla containing 2.4-fold more protein. Mean adult female fly weight peaked when emergence is low (i.e. low crowding) and leaf protein content is high. The hydrilla biological control pathogen Mycoleptodiscus terrestris (Gerd.) Ostazeski also responds to plant nutritional condition. The nutritional status of hydrilla shoots affects M. terrestris vegetative growth, disease development and conidia and microsclerotia production. High protein content in shoot tissues was associated with a more than threefold increase in conidia production and maximum disease severity. In contrast, low protein content in shoot tissues stimulated a 3.7-fold increase in melanized microsclerotia, reproductive structures that are more persistent in the environment than conidia. These studies suggest that the nutritional condition of target plants cannot be excluded as an important factor in efficacy of biological control agents. Both agents responded to favorable conditions by reproducing prolifically, which ultimately resulted in increased host damage.

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“…The application of phytopathogenic fungi positively impacts controlling aquatic plant Eichhornia crassipes, with a maximum deterioration of 88-94% (Moreira et al 2018). Previous studies have successfully controlled the growth of hydrilla by using the fungi Fusarium culmorum, Mycoleptodiscus terrestris (Shearer et al 2007), and Macrophomina phaseolina (Zilli et al 2018). The fungus M. terrestris is an endemic fungal pathogen and a potential biological control agent for hydrilla as observed in laboratory, greenhouse, and field trials.…”

Section: Introductionmentioning

confidence: 99%

Growth inhibition of Hydrilla verticillata by freshwater fungi

2021

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Abstract. Triadiati T, Sukarno N, Rahmah IS. 2021. Growth inhibition of Hydrilla verticillata by freshwater fungi. Biodiversitas 22: 2876-2882. The uncontrolled growth of hydrilla (Hydrilla verticillata (L.f.) Royle) in Mekarsari Fruit Garden, Bogor causes various losses. A Freshwater fungus is one of the alternatives to control hydrilla growth. Therefore, the study aimed to investigate the damage and growth inhibition of hydrilla using freshwater fungi. Freshwater fungi were isolated from Lake Mekarsari Fruit Garden. Hydrilla growth characteristics observed were stem length, stem nodus number, number of healthy leaves, leaf number, leaf damage, wet and dry weight. The results showed that a total of seven isolates of freshwater fungi were obtained from Lake Mekarsari Fruit Garden. Two species, i.e. Myrothecium sp. and Stachybotrys sp. were selected to control hydrilla growth. Fungal treatment reduced the stem length and leaf number of hydrilla. The combination of both fungal isolates showed less leaf damage than Myrothecium sp. The damage of hydrilla leaves by Myrothecium sp. and Stachybotrys sp. were 98.07% and 78.71%, respectively.

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Nutritional quality of Hydrilla verticillata (L.f.) Royle and its effects on a fungal pathogen Mycoleptodiscus terrestris (Gerd.) Ostazeski

Cited by 14 publications

References 16 publications

Effects of common carp (Cyprinus carpio) on water quality in aquatic ecosystems dominated by submerged plants: a mesocosm study

Effects of common carp (Cyprinus carpio) on water quality in aquatic ecosystems dominated by submerged plants: a mesocosm study

Nutritional characteristics of Hydrilla verticillata and its effect on two biological control agents.

Growth inhibition of Hydrilla verticillata by freshwater fungi

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