scholarly journals Phenotypic diversity in the biological and behavioral responses of isolines of >i/ii/i< (M\'Intosh, 1855) (Hymenoptera: Braconidae)

2021 ◽  
Author(s):  
Mariane Possignolo Gomes
Keyword(s):  
Myzus Persicae ◽  
Phenotypic Diversity ◽  
Behavioral Responses ◽  
Diaeretiella Rapae

scholarly journals Parasitism rate of Myzus persicae (Sulzer) by Diaeretiella rapae (McIntosh) in the presence of an alternative, resistant host

2018 ◽  
Vol 62 (1) ◽  
pp. 13-18 ◽  
Author(s):  
Samira Evangelista Ferreira ◽  
Marcus Vinicius Sampaio ◽  
Reinaldo Silva de Oliveira ◽  
Heraldo Luís de Vasconcelos
Keyword(s):  
Myzus Persicae ◽  
Diaeretiella Rapae ◽  
Parasitism Rate

scholarly journals Effects of cis-Jasmone Treatment of Brassicas on Interactions With Myzus persicae Aphids and Their Parasitoid Diaeretiella rapae

2021 ◽  
Vol 12 ◽  
Author(s):  
Jamin Ali ◽  
Anca D. Covaci ◽  
Joe M. Roberts ◽  
Islam S. Sobhy ◽  
William D. J. Kirk ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Myzus Persicae ◽  
Methyl Salicylate ◽  
Plant Defence ◽  
Diaeretiella Rapae ◽  
Methyl Isothiocyanate ◽  
Volatile Emission ◽  
Brassica Crops ◽  
Wide Range ◽  
Promising Treatment

There is a need to develop new ways of protecting plants against aphid attack. Here, we investigated the effect of a plant defence activator, cis-jasmone (CJ), in a range of cultivars of Brassica napus, Brassica rapa and Brassica oleracea. Plants were sprayed with cis-jasmone or blank formulation and then tested with peach potato aphids (Myzus persicae Sulzer) (Hemiptera: Aphididae) and their parasitoid Diaeretiella rapae (M'Intosh) (Hymenoptera: Braconidae). CJ treated plants had significantly lower aphid settlement than control plants in a settlement bioassay. Conversely, in a foraging bioassay, D. rapae parasitoids spent a significantly longer time foraging on CJ treated plants. Our results reveal that CJ treatment makes plants less attractive to and less suitable for M. persicae but more attractive to D. rapae in a range of brassica cultivars. It is likely that these effects are due to changes in volatile emission indicating activation of defence and presence of conspecific competitors to aphids but presence of prey to parasitoids. Increases in volatile emission were found in CJ induced plants but varied with genotype. Among the synthetic volatile compounds that were induced in the headspace of CJ treated brassica cultivars, methyl isothiocyanate, methyl salicylate and cis-jasmone were most repellent to aphids. These results build on earlier studies in Arabidopsis and show that tritrophic interactions are influenced by CJ in a wide range of brassica germplasm. The implication is that CJ is a promising treatment that could be used in brassica crops as part of an integrated pest management system.

Different pepper cultivars affect performance of second (Myzus persicae) and third (Diaeretiella rapae) trophic levels

2019 ◽  
Vol 22 (1) ◽  
pp. 194-202 ◽  
Author(s):  
Mona Ghorbanian ◽  
Yaghoub Fathipour ◽  
Ali Asghar Talebi ◽  
Gadi V.P. Reddy
Keyword(s):  
Myzus Persicae ◽  
Trophic Levels ◽  
Diaeretiella Rapae

scholarly journals Genetic variation and covariation of susceptibility to parasitoids in the aphid Myzus persicae : no evidence for trade-offs

2008 ◽  
Vol 275 (1638) ◽  
pp. 1089-1094 ◽  
Author(s):  
Simone von Burg ◽  
Julia Ferrari ◽  
Christine B Müller ◽  
Christoph Vorburger
Keyword(s):  
Genetic Variation ◽  
Myzus Persicae ◽  
Diaeretiella Rapae ◽  
Mortality Factor ◽  
General Mechanism ◽  
Clonal Variation ◽  
Heritable Variation ◽  
Trade Offs ◽  
Rate Of Increase ◽  
Strong Negative Selection

Parasitoids are an important mortality factor for insects. Susceptibility to parasitoids should thus be under strong negative selection. Nevertheless, ample genetic variation for susceptibility to parasitoids is commonly observed in natural populations, suggesting that trade-offs may constrain the evolution of reduced susceptibility. This can be studied by assessing genetic variation for susceptibility and its covariation with other components of fitness. In a set of 17 clones of the peach potato aphid, Myzus persicae , for which good estimates of heritable variation for life-history traits were available, we found significant clonal variation for susceptibility to two of their common parasitoids: Aphidius colemani and Diaeretiella rapae . One clone, the only one harbouring a facultative endosymbiotic bacterium, Regiella insecticola , was entirely resistant to both parasitoids. Susceptibilities to the two parasitoids exhibited a positive genetic correlation close to unity, implying a general mechanism of defence. However, the susceptibility to parasitoids was uncorrelated to the clones' fecundity or rate of increase, providing no evidence for costs of the ability to resist parasitoids.

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