Effect of Plant Type on the Persistence of<i>Beauveria bassiana</i>

Kouassi, Mathias; Coderre, Daniel; Todorova, Silvia

doi:10.1080/0598315031000104532

Cited by 21 publications

(23 citation statements)

References 28 publications

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“…According to Poprawski et al (2000) whitefly nymphs reared on tomatoes were significantly less susceptible to infection by B. bassiana and I. fumosorosea than whiteflies reared on cucumber. Lygus bug mortalities from B. bassiana were significantly different between celery and lettuce (Kouassi et al 2003). Ugine et al (2007) described a strong difference-sevenfold-in thrips infection rates from B. bassiana on beans and impatiens due to a much greater acquisition of conidia from bean leaves.…”

Section: Influence Of Phylloplane Chemistrymentioning

confidence: 95%

“…There also seem to be differences among plants in terms of persistence of spores on foliage, differences that may be mediated by leaf cuticle chemistry. There were significant differences in retention of conidia on lettuce (Lactuca sativa L.) and celery (Apium graveolens L.) following significant natural rainfall during a field trial (Kouassi et al 2003). Rain reduced the numbers of CFU on celery by 92% but only 10% on lettuce.…”

Section: Rainfallmentioning

confidence: 98%

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Ecological factors in the inundative use of fungal entomopathogens

2009

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Fungal entomopathogens have been developed in numerous countries as biocontrol agents with more than 100 mycoinsecticide products commercially available in 2006. The chief, perhaps sole, use of these mycoinsecticides has been as inundative agents, within a chemical paradigm. Large numbers of propagules are applied in an attempt to overwhelm by brute force many of the factors that keep a pathogen in nonepizootic equilibrium with its host. This review attempts to summarize what we know about the abiotic and biotic factors that affect the efficacy of these mycoinsecticides in both foliar and soil applications. Sunlight, humidity, temperature, and phylloplane-associated factors can affect both immediate efficacy and persistence on plants. Likewise, soil texture-moisture interactions, temperature, and a host of biotic factors can affect mycoinsecticides in the soil. Despite much research, our understanding of these ecological aspects is imperfect, especially in a holistic, dynamic sense.

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Section: Influence Of Phylloplane Chemistrymentioning

confidence: 95%

Section: Rainfallmentioning

confidence: 98%

Ecological factors in the inundative use of fungal entomopathogens

2009

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“…However, Bb conidia could also persist up to 26 days on lettuce and celery foliage (Kouassi et al 2003) and 28 days on alfalfa (James et al 1995). For greenhouse experiments in the present study, the percentage reduction of conidial density calculated indicated that more than 50% of the initial conidial population (recovery at the time 0 week post-spray) was still viable on leaves of crops three weeks after spraying.…”

Section: Discussionmentioning

confidence: 79%

“…Persistence of entomopathogens on plant foliage has been associated with their efficacy as biocontrol agents (Ignoffo 1992). When comparing application of Bb on celery and lettuce foliage for the control of tarnished plant bug, Lygus lineolaris (Palisot de Beauvois), Kouassi et al (2003) found better control on lettuce than on celery. This was attributed to longer persistence of Bb propagules on the leaves of lettuce than on the leaves of celery.…”

Section: Discussionmentioning

confidence: 99%

“…Another factor determining the success of foliar applications of microbial control agents is their persistence on plant leaf surfaces (Ignoffo 1992) and this can also be affected by the crop (Kouassi et al 2003). Hence, the present study investigated the following on five different crops: (a) whether the persistence of Bb conidia on leaf surfaces differed among the crops; (b) whether mortality of mites due to Bb application varied among the crop type; and (c) whether there was a relationship between the persistence of conidia and the mortality of mites.…”

Section: Introductionmentioning

confidence: 99%

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Effects of crop type on persistence and control efficacy of Beauveria bassiana against the two spotted spider mite

2010

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The influence of five different crops (beans, cucumber, eggplant, maize, and tomato) on persistence and the control efficacy of Beauveria bassiana (Balsamo) Vuillemin to Tetranychus urticae Koch was investigated. Plants were artificially infested with T. urticae. B. bassiana conidia were suspended in Break-thru Ò solution (0.01%) at three different concentrations (0.5, 1, 2 g l -1 ) and sprayed once onto plants. Plants in the control treatment were sprayed with Break-thru Ò solution alone. The number of conidia and levels of mite mortality were evaluated. Colony forming unit counts of conidia recovered from plant leaves declined over time regardless of the concentrations of B. bassiana applied. The rate of decline was different among crops and significantly higher on maize. However, more than 50% of the initial population of conidia were still viable on crops three weeks after application. The longer persistence of B. bassiana on crops did not result in better control of mites. Rather, mortality was positively correlated to the amount of inoculum deposited on leaves immediately after spraying. Mortality of mites was concentration-dependent and influenced by the host crop, with less control observed on maize and tomato than eggplant, beans and cucumber. Results were consistent between trials conducted and confirmed the hypothesis that the type of crop can influence the efficacy of B. bassiana against T. urticae.

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Importance of Multitrophic Interactions for Successful Biocontrol of Plant Parasitic Nematodes with Paecilomyces lilacinus Strain 251

Kiewnick

2009

Recent Developments in Management of Plant Diseases

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Effect of Plant Type on the Persistence ofBeauveria bassiana

Cited by 21 publications

References 28 publications

Ecological factors in the inundative use of fungal entomopathogens

Ecological factors in the inundative use of fungal entomopathogens

Effects of crop type on persistence and control efficacy of Beauveria bassiana against the two spotted spider mite

Importance of Multitrophic Interactions for Successful Biocontrol of Plant Parasitic Nematodes with Paecilomyces lilacinus Strain 251

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