scholarly journals Peer Review #1 of "The ability of the green peach aphid (Myzus persicae) to penetrate mesh crop covers used to protect potato crops against tomato potato psyllid (Bactericera cockerelli) (v0.2)"

2020 ◽  
Keyword(s):  
Peer Review ◽  
Myzus Persicae ◽  
Green Peach Aphid ◽  
Potato Psyllid ◽  
Bactericera Cockerelli ◽  
Potato Crops

scholarly journals The ability of the green peach aphid (Myzus persicae) to penetrate mesh crop covers used to protect potato crops against tomato potato psyllid (Bactericera cockerelli)

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e9317
Author(s):  
Howard London ◽  
David J. Saville ◽  
Charles N. Merfield ◽  
Oluwashola Olaniyan ◽  
Stephen D. Wratten
Keyword(s):  
New Zealand ◽  
Myzus Persicae ◽  
Insect Pests ◽  
Green Peach Aphid ◽  
Mesh Size ◽  
Potato Psyllid ◽  
Bactericera Cockerelli ◽  
Crop Cover ◽  
Large Numbers ◽  
Potato Crops

In Central and North America, Australia and New Zealand, potato (Solanum tuberosum) crops are attacked by Bactericera cockerelli, the tomato potato psyllid (TPP). ‘Mesh crop covers’ which are used in Europe and Israel to protect crops from insect pests, have been used experimentally in New Zealand for TPP control. While the covers have been effective for TPP management, the green peach aphid (GPA, Myzus persicae) has been found in large numbers under the mesh crop covers. This study investigated the ability of the GPA to penetrate different mesh hole sizes. Experiments using four sizes (0.15 × 0.15, 0.15 × 0.35, 0.3 × 0.3 and 0.6 × 0.6 mm) were carried out under laboratory conditions to investigate: (i) which mesh hole size provided the most effective barrier to GPA; (ii) which morph of adult aphids (apterous or alate) and/or their progeny could breach the mesh crop cover; (iii) would leaves touching the underside of the cover, as opposed to having a gap between leaf and the mesh, increase the number of aphids breaching the mesh; and (iv) could adults feed on leaves touching the cover by putting only their heads and/or stylets through it? No adult aphids, either alate or apterous, penetrated the mesh crop cover; only nymphs did this, the majority being the progeny of alate adults. Nymphs of the smaller alatae aphids penetrated the three coarsest mesh sizes; nymphs of the larger apterae penetrated the two coarsest sizes, but no nymphs penetrated the smallest mesh size. There was no statistical difference in the number of aphids breaching the mesh crop cover when the leaflets touched its underside compared to when there was a gap between leaf and mesh crop cover. Adults did not feed through the mesh crop cover, though they may have been able to sense the potato leaflet using visual and/or olfactory cues and produce nymphs as a result. As these covers are highly effective for managing TPP on field potatoes, modifications of this protocol are required to make it effective against aphids as well as TPP.

Seasonal Dispersal of the Potato Psyllid,Bactericera cockerelli, into Potato Crops

2014 ◽  
Vol 39 (1) ◽  
pp. 177-186 ◽  
Author(s):  
Warrick R. Nelson ◽  
Kylie D. Swisher ◽  
James M. Crosslin ◽  
Joseph E. Munyaneza
Keyword(s):  
Potato Psyllid ◽  
Bactericera Cockerelli ◽  
Potato Crops

scholarly journals Biorational insecticides for control of the tomato potato psyllid

2013 ◽  
Vol 66 ◽  
pp. 333-340 ◽  
Author(s):  
N. Jorgensen ◽  
R.C. Butler ◽  
J. Vereijssen
Keyword(s):  
Insect Pest ◽  
Field Trials ◽  
Control Measures ◽  
Potato Psyllid ◽  
Control Methods ◽  
Bactericera Cockerelli ◽  
Insect Pest Control ◽  
Beneficial Insects ◽  
Potato Crops ◽  
Laboratory Bioassays

Since its discovery in 2006 the tomato potato psyllid Bactericera cockerelli (ulc) (TPP) has been considered a significant pest of solanaceous crops in New Zealand resulting in an intensification of insect pest control measures often with the use of broadspectrum insecticides In the search for more sustainable control methods in outdoor potato crops several biorational insecticides were tested in laboratory bioassays to assess their effects on TPP behaviour and mortality The products tested were Organic JMS StyletOil Excel Oil EcoOil Neem 600 WP and Sap Sucker Plus Given the efficacy of JMS Stylet Oil Sap Sucker Plus and Excel Oil at reducing TPP numbers and their probing/feeding deterrent qualities these products are now being tested in a field trial The impacts of the tested biorational insecticides on beneficial insects are also being assessed in laboratory and field trials

scholarly journals The southern ladybird (Cleobora mellyi) as a new species association biocontrol agent of tomatopotato psyllid (Bactericera cockerelli)

2014 ◽  
Vol 67 ◽  
pp. 321-321
Author(s):  
A.R. Pugh ◽  
D.M. O'Connell ◽  
S.D. Wratten
Keyword(s):  
New Zealand ◽  
Biocontrol Agent ◽  
Green Peach Aphid ◽  
Generalist Predator ◽  
Bactericera Cockerelli ◽  
Potato Tubers ◽  
Greenhouse Whitefly ◽  
Potato Aphid ◽  
Floral Resource ◽  
Potato Crops

Since its discovery in New Zealand in 2006 the tomatopotato psyllid (Bactericera cockerelli) (TPP) has emerged as a major pest of solanaceous crops In potato crops the management of TPP has predominantly relied on insecticide applications as biological control by generalist predators has been constrained by both insecticide use and temporal and spatial scales This research sought to further investigate a generalist predator already established in New Zealand the southern ladybird (Cleobora mellyi) introduced from Tasmania as a biocontrol agent for Paropsis charybdis in the 1970s and 1980s as a potential biocontrol agent of TPP The southern ladybirds prey selection ladybird longevity and ladybirdTPP predatorprey dynamics were investigated A choice test assay utilised small experimental arenas of three alternative choices between (1) TPP and green peach aphid Myzus persicae (2) TPP and potato aphid Macrosiphum euphorbiae and (3) TPP and greenhouse whitefly Trialeurodes vaporariorum Cleobora mellyi larvae and adults did not demonstrate a significant prey preference between TPP and either green peach aphid or potato aphid but did show a significant aversion to greenhouse whitefly Longevity trials consisted of a water only control and three treatments (1) a floral resource (flowering buckwheat) (2) 10 TPP/day or (3) flowering buckwheat 10 TPP/day All three treatments lived significantly longer than the water only control and southern ladybirds adults lived significantly longer when given both the floral resource and TPP compared to only being given TPP A glasshouse mesocosm study was used to investigate ladybirdTPP predatorprey dynamics Within 3 weeks the southern ladybird had significantly reduced TPP densities in the treatment in which they were present along with potato plants and TPP compared to the treatment without ladybirds a reduction that was maintained until the completion of the experiment Where there was only TPP and no ladybird no potato tubers were formed; in the presence of southern ladybird small and few potato tubers were formed while the most tubers were produced in insectfree controls This indicates a specieslevel trophic cascade This study has shown that the southern ladybird is capable of predating upon TPP and reducing densities within the controlled conditions of a glasshouse However with the current state of knowledge the southern ladybird is not likely to be a viable predator for controlling TPP in potato crops outside glasshouses in New Zealand This is due in part to the freedom to disperse in the field the economics of such large scale rearing and fundamental differences in habitat type compared to their natural environment but applications in alternative contexts cannot be ruled out

scholarly journals The application of 980 degree days as a trigger for rapid increases in Bactericera cockerelli in Hawkes Bay solanaceae crops

2015 ◽  
Vol 68 ◽  
pp. 441-441
Author(s):  
N.M. Taylor ◽  
R.C. Butler ◽  
J. Vereijssen
Keyword(s):  
Host Plants ◽  
Sticky Trap ◽  
Potato Psyllid ◽  
Bactericera Cockerelli ◽  
Yield Losses ◽  
Degree Days ◽  
Plant Monitoring ◽  
Trap Catches ◽  
Potato Crops

During 200708 the tomato potato psyllid (TPP Bactericera cockerelli) was observed in outdoor tomato and potato crops in Hawkes Bay Many crops were heavily infested resulting in severe yield losses and in some cases crop abandonment Since then growers have been proactive in plant monitoring and sticky trap use but these methods are expensive and quite often a calendar spray programme is begun once the first adult TPP have been observed in traps It has been proposed that 980 degreedays (DDs) from 1 July is used as an indicator of when TPP numbers are about to increase rapidly in North Island crops This study describes the application of 980 DDs to recent sticky trap data from Hawkes Bay For most sites 980 DDs occurred just before rapid increases in adult TPP numbers However there were a small number of sites where this was not so The presence of noncrop TPP host plants bordering these sites may explain rapid increases in TPP trap catches well before reaching 980 DDs

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