Development of the parasitoid, Cotesia rubecula (Hymenoptera: Braconidae) in Pieris rapae and Pieris brassicae (Lepidoptera: Pieridae): evidence for host regulation

1999 ◽  
Vol 45 (2) ◽  
pp. 173-182 ◽  
Author(s):  
Jeffrey A Harvey ◽  
Mark A Jervis ◽  
Rieta Gols ◽  
Nanqing Jiang ◽  
Louise E.M Vet
Keyword(s):  
Pieris Rapae ◽  
Pieris Brassicae ◽  
Cotesia Rubecula ◽  
Host Regulation

scholarly journals Natural dispersal of Cotesia rubecula the recently introduced larval parasitoid of Pieris rapae through the South Island

2013 ◽  
Vol 66 ◽  
pp. 379-379
Author(s):  
G.P. Walker ◽  
F.H. MacDonald
Keyword(s):  
Pieris Rapae ◽  
Pieris Brassicae ◽  
Cotesia Glomerata ◽  
The South ◽  
Cotesia Rubecula ◽  
Far North ◽  
Larval Parasitoid ◽  
Interesting Study ◽  
Initial Release ◽  
Natural Dispersal

The natural dispersal of Cotesia rubecula the important larval parasitoid of Pieris rapae (small white butterfly) was assessed through the South Island over 2 years as part of an SFF project to improve management of foliage pests on forage vegetable and seed brassicas grown in the South Island This parasitoid has dispersed naturally from its initial release sites at Lincoln and Christchurch as far south as Dunedin airport as far north as north Cheviot and inland to Methven and Hanmer Springs However it has failed to establish in Southland and is not present in central Otago or Nelson/Marlborough Seasonal surveys indicate that this parasitoid is well synchronised with its host sometimes parasitising complete cohorts in a cropping area There is also strong evidence that C rubecula is displacing the earlier introduced and much less effective larval parasitoid Cotesia glomerata The hyperparasitoid Baryscapus galactopus is also affecting the new primary parasitoid A new SFF project is supporting the introduction of C rubecula into the Nelson/Marlborough region where its future interaction with C glomerata and possibly its other host Pieris brassicae (great white butterfly) a new incursion into New Zealand will be an interesting study

scholarly journals I Ropaloceri del litorale a duna della ZSC IT5160004 Padule di Bolgheri (Livorno, Toscana) (Lepidoptera)

2018 ◽  
pp. 113-121
Author(s):  
Leonardo Favilli
Keyword(s):  
Pieris Rapae ◽  
Pieris Brassicae ◽  
Sono Stati ◽  
Lasiommata Megera ◽  
Anthocharis Cardamines

Nel 2015 è stata studiata la fauna a Ropaloceri del litorale a duna della ZSC IT5160004 Padule di Bolgheri (provincia di Livorno). I campionamenti sono stati effettuati due volte al mese, da aprile a ottobre, in un transetto di 1 km utilizzando il metodo di Pollard and Yates (1993). Complessivamente sono stati campionati 422 esemplari attribuibili a 30 specie. Le specie dominanti sono 7 (Lasiommata megera, Leptotes pirithous, Colias crocea, Gonepteryx rhamni, Pieris brassicae, Gonepteryx cleopatra, Hipparchia statilinus, Coenonympha elbana, Anthocharis cardamines, Pieris rapae e Limenitis reducta), abbondanti 4, 7 comuni, 7 occasionali e 5 rare. Rilevante è la presenza di Gegenes nostrodamus, in diminuzione in Italia e di Coenonympha elbana, endemica della Toscana. Si tratta di una fauna povera in specie, costituita da entità euriece e che non sono esclusive dell’ambiente di duna. Nel sistema a duna indagato i Ropaloceri sono, quindi, rappresentati in modo limitato e non annoverano entità utili a caratterizzarle in maniera univoca.

scholarly journals Effectiveness of biological protection of cabbage against pests in the conditions of the Primorsky Territory

2021 ◽  
Vol 51 (5) ◽  
pp. 51-57
Author(s):  
A. S. Pronyushkina ◽  
T. K. Kovalenko ◽  
E. N. Lastushkina
Keyword(s):  
Field Experiments ◽  
High Efficiency ◽  
Pieris Rapae ◽  
Diamondback Moth ◽  
Pieris Brassicae ◽  
Mamestra Brassicae ◽  
Biological Products ◽  
Biological Protection ◽  
Cabbage Pests ◽  
Cabbage Moth

The results of the use of entomophages and biological products to regulate the number of cabbage pests (cabbage moth Mamestra brassicae L., cabbage butterfly Pieris brassicae L., turnip butterfly Pieris rapae L., diamondback moth Plutella xylostella L.) are presented. The study was carried out in the Primorsky Territory in 2018-2020. The efficiency of Trichogramma ussuricum Sorokina applications was assessed on cabbage varieties. The effectiveness of the entomophage against the cabbage moth varied from 33.3 to 66.6%, against the turnip butterfly - from 32.6 to 70.2%. In field experiments the effectiveness of biological products Fitoverm EC (0.09 l/ha), Akarin EC (1.6 l/ha), Proclaim WG (0.3 kg/ha), Bitoxibacillin (10 l/ha), Bitoxibacillin P (2 kg/ha), Lepidocid SC (2 l/ha), Lepidocid P (2 kg/ha) against diamondback moth are studied. Cabbage plants were sprayed with the preparations once. Pest counts were carried out before treatment and after treatment on the 5th, 10th and 15th day in accordance with the approved methods. Bioinsecticide Proclaim showed a high efficiency of 93.0-100% on the 5-10th day. The effectiveness of preparations based on aversectin C and avertin N was 65.0-88.6%. Using the biological product Bitoxibacillin and Lepidocid a decrease the number of diamondback moth relative to the control by 61.2-97.5 и 65.0-78.0% was registered.

scholarly journals Interactions of Insecticidal Toxin Gene Products from Xenorhabdus nematophilus PMFI296

2003 ◽  
Vol 69 (6) ◽  
pp. 3344-3349 ◽  
Author(s):  
Martin Sergeant ◽  
Paul Jarrett ◽  
Margaret Ousley ◽  
J. Alun W. Morgan
Keyword(s):  
Insecticidal Activity ◽  
Pieris Rapae ◽  
Single Gene ◽  
Pieris Brassicae ◽  
Toxin Gene ◽  
Insecticidal Toxin ◽  
Individual Gene ◽  
E Coli ◽  
Commercially Important ◽  
Xenorhabdus Nematophilus

ABSTRACT Four genes on a genomic fragment from Xenorhabdus nematophilus PMFI296 were shown to be involved in insecticidal activity towards three commercially important insect species. Each gene was expressed individually and in combinations in Escherichia coli, and the insecticidal activity of the lysates was determined. The combined four genes (xptA1, xptA2, xptB1, and xptC1), in E. coli, showed activity towards Pieris brassicae, Pieris rapae, and Heliothis virescens. The genes xptA1, xptB1, and xptC1 were involved in expressing activity towards P. rapae and P. brassicae, while the genes xptA2, xptB1, and xptC1 were needed for activity towards H. virescens. When each of these three genes was expressed individually in E. coli and the cell lysates were used in insect assays or mixed and then used, insecticidal activity was detected at a very low level. If the genes xptB1 and xptC1 were expressed in the same E. coli cell and this cell lysate was mixed with cells expressing xptA1, activity was restored to P. rapae and P. brassicae. Similarly mixing XptB1/C1 lysate with XptA2 lysate restored activity towards H. virescens. Individual gene disruptions in X. nematophilus PMFI296 reduced activity to insects; this activity was restored by complementation with cells expressing either xptA1 or xptA2 for their respective disruptions or E. coli expressing both xptB1 and xptC1 for individual disruptions of either of these genes. The genes xptA2, xptC1, and xptB1 were expressed as an operon in PMFI296 and inactivation of xptA2 or xptC1 resulted in silencing of downstream gene(s), while xptA1 was expressed as a single gene. Therefore, the two three gene product combinations interact with each other to produce good insecticidal activity.

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