Effect of temperature on development, growth and feeding of Coccinella septempunctata and Hippodamia convergens reared on the tobacco aphid, Myzus persicae nicotianae

BioControl ◽  
2005 ◽  
Vol 50 (4) ◽  
pp. 565-588 ◽  
Author(s):  
Ioanna Katsarou ◽  
John T. Margaritopoulos ◽  
John A. Tsitsipis ◽  
Dionyssios Ch. Perdikis ◽  
Kostas D. Zarpas
Keyword(s):  
Myzus Persicae ◽  
Coccinella Septempunctata ◽  
Effect Of Temperature ◽  
Hippodamia Convergens ◽  
Tobacco Aphid

scholarly journals Silencing cathepsin L expression reduces Myzus persicae protein content and the nutritional value as prey for Coccinella septempunctata

2018 ◽  
Author(s):  
Imran Rauf ◽  
Muhammad Asif ◽  
Imran Amin ◽  
Rubab Zahra Naqvi ◽  
Noroza Umer ◽  
...  
Keyword(s):  
Rna Interference ◽  
Transgenic Plants ◽  
Protein Content ◽  
Pest Control ◽  
Myzus Persicae ◽  
Nutritive Value ◽  
Cathepsin L ◽  
Coccinella Septempunctata ◽  
List Type ◽  
Rnai Construct

AbstractGut-expressed aphid genes, which may be more easily inhibited by RNA interference (RNAi) constructs, are attractive targets for pest control efforts involving transgenic plants. Here we show that expression of cathepsin L, a cysteine protease that functions in aphid guts, can be reduced by expression of an RNAi construct in transgenic tobacco. The effectiveness of this approach is demonstrated by up to 80% adult mortality, reduced fecundity, and delayed nymph production of Myzus persicae (green peach aphids) when cathepsin L expression was reduced by plant-mediated RNAi. Consistent with the function of cathepsin L as a gut protease, M. persicae fed on the RNAi plants had a lower protein content in their bodies and excreted more protein in their honeydew. Larvae of Coccinella septempunctata (seven-spotted ladybugs) grew more slowly on aphids having reduced cathepsin L expression, suggesting that prey insect nutritive value, and not just direct negative effects of the RNAi construct, needs to be considered when producing transgenic plants for RNAi-mediated pest control.HighlightsSilencing expression of cathepsin L by RNA interference reduces protein content of Myzus persicae (green peach aphid) bodies.Honeydew of aphids with cathepsin L silenced contains elevated protein.Cathepsin L is required for efficient protein uptake from phloem sap.Aphids with cathepsin L expression silenced have increased mortality and fewer offspring.Coccinella septempunctata (seven-spotted ladybugs) grow more slowly on aphids with expression of cathepsin L silenced.

Performance of the tobacco aphid Myzus persicae (Hemiptera: Aphididae) on Oriental and Virginia tobacco varieties

2003 ◽  
Vol 5 (4) ◽  
pp. 285-291 ◽  
Author(s):  
Stavroula Goundoudaki ◽  
John A. Tsitsipis ◽  
John T. Margaritopoulos ◽  
Konstandinos D. Zarpas ◽  
Savas Divanidis
Keyword(s):  
Myzus Persicae ◽  
Tobacco Aphid

Biological characteristics of the mirids Macrolophus costalis and Macrolophus pygmaeus preying on the tobacco form of Myzus persicae (Hemiptera: Aphididae)

2003 ◽  
Vol 93 (1) ◽  
pp. 39-45 ◽  
Author(s):  
J.T. Margaritopoulos ◽  
J.A. Tsitsipis ◽  
D.C. Perdikis
Keyword(s):  
Myzus Persicae ◽  
Total Duration ◽  
Intrinsic Rate Of Increase ◽  
Adult Males ◽  
Macrolophus Pygmaeus ◽  
Rate Of Increase ◽  
Predatory Bugs ◽  
Aphid Consumption ◽  
The Impact ◽  
Tobacco Aphid

AbstractBiological and population parameters of the predatory bugs Macrolophus costalis Fieber and Macrolophus pygmaeus Rambur preying on the tobacco aphid Myzus persicae (Sulzer) were examined. Tobacco was used as host plant and all experiments were carried out at 23°C and L16:D8. In M. costalis, the developmental time for eggs and the total duration of nymphal instars was 13.1 and 22.2 days and in M. pygmaeus 13.0 and 20.2 days, respectively. Both species completed their nymphal development feeding only on plant juices although they required significantly more time to attain adulthood than when feeding on prey. The longevity of M. costalis females and the preoviposition period were 49.9 and 5.6 days and those of M. pygmaeus were 50.3 and 6.3 days, respectively. Adult males showed a higher longevity than females in both species. The intrinsic rate of increase and the mean total number of eggs laid were 0.0644 and 121 in M. costalis and 0.0615 and 104 in M. pygmaeus, respectively. Mean total aphid consumption by nymphs of M. costalis was 61 aphids, about twice that of M. pygmaeus (37 aphids). Total aphid consumption by a male and female pair of M. costalis and M. pygmaeus until the death of the female was 244 and 285 aphids, respectively. The results of the study are discussed in relation to the impact of the two predatory bugs on tobacco aphid populations.

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