Nutrition physiology of the pear psylla,Cacopsylla pyri

2016 ◽  
Author(s):  
Guillaume Le Goff
Keyword(s):  
Cacopsylla Pyri ◽  
Pear Psylla

Selection for monocrotophos resistance in pear psylla,Cacopsylla pyri(L.) (Hom., Psyllidae)

1995 ◽  
Vol 119 (1-5) ◽  
pp. 507-510 ◽  
Author(s):  
S. Berrada ◽  
T. X. Nguyen ◽  
D. Merzoug ◽  
D. Fournier
Keyword(s):  
Cacopsylla Pyri ◽  
Pear Psylla ◽  
Selection For

scholarly journals Efficacy of Spirotetramat in the Control of Pear Psylla (Cacopsylla Pyri L.) on Pear Trees in Poland

2012 ◽  
Vol 20 (2) ◽  
pp. 91-106 ◽  
Author(s):  
Krystyna Jaworska ◽  
Remigiusz W. Olszak ◽  
Barbara H. Łabanowska ◽  
Mirosław Korzeniowski
Keyword(s):  
Field Experiments ◽  
Early Stage ◽  
Single Application ◽  
Pest Population ◽  
Total Reduction ◽  
Cacopsylla Pyri ◽  
Summer Generation ◽  
Pear Psylla ◽  
Pear Trees ◽  
Very High

Abstract The effectiveness of spirotetramat in the control of pear psylla (Cacopsylla pyri) on pear trees was investigated in five field experiments, carried out in years 2009- 2011. One or two treatments were applied in June; the first treatment in the early stage of larvae hatching from eggs deposited by females from the summer generation, whilst the second application was carried out about two weeks later. In all the experiments, spirotetramat as Movento 100 SC applied at a dose of 2.25 l/ha effectively reduced the pest population after only a single application (total reduction of larvae after one week post-treatment 75.3-91.4%, and 83.7-97.6% at two weeks posttreatment). Movento 100 SC applied after a single application at a lower dose of 1.8 l/ha had a slightly worse effect (the total reduction of larvae at one week posttreatment was at the level of 58.4-91.3%, and two weeks after application at the level of 56-92.6%) - but in this case only a few larvae at stages L4 and L5 were found on pear shoots. The effectiveness of spirotetramat at both doses after two applications was very high.In comparison with standard insecticides the efficacy of spirotetramat was higher or not significantly different. In two experiments the application of standard compounds such as diflubenzuron and novaluron was not effective in controlling pear psylla and therefore did not prevent damage to pear trees. This may suggest that local populations of the pest are resistant to these measures, especially since they have been used for many years to control other pests of pear trees

Phenological model of pear psylla Cacopsylla pyri

2005 ◽  
Vol 117 (2) ◽  
pp. 105-111 ◽  
Author(s):  
L. Schaub ◽  
B. Graf ◽  
A. Butturini
Keyword(s):  
Phenological Model ◽  
Cacopsylla Pyri ◽  
Pear Psylla

Detecting Cacopsylla pyricola (Hemiptera: Psyllidae) in predator guts using COI mitochondrial markers

2003 ◽  
Vol 93 (3) ◽  
pp. 179-185 ◽  
Author(s):  
N. Agustí ◽  
T.R. Unruh ◽  
S.C. Welter
Keyword(s):  
Molecular Markers ◽  
North America ◽  
Instar Nymph ◽  
Close Relative ◽  
Sensitivity Threshold ◽  
Mitochondrial Markers ◽  
Cacopsylla Pyri ◽  
Arthropod Predators ◽  
Representative Species ◽  
Pear Psylla

AbstractCacopsylla pyricola (Förster) is one of the most important pests of pear in North America, where several native predators have been considered for integrated pest management (IPM) programmes. Two molecular markers of 271 and 188 bp were developed from C. pyricola cytochrome oxidase I (COI) fragments, in order to study the detection of this species in the gut of arthropod predators. Primer sensitivity and the detection period for pear psylla remains in the guts of Anthocoris tomentosus Pericart were determined. The sensitivity threshold was defined at 10-5 dilution of a C. pyricola fifth-instar nymph in all samples. Predator adults were evaluated immediately after ingestion of one to five C. pyricola nymphs (t = 0) and after 2, 4, 6, 8, 16, 24 and 32 h. Detection of the presence of C. pyricola DNA always lasted longer using the shorter fragment and was observed after 32 h of digestion using both markers. The primers amplifying the 188 bp fragment amplified all four psyllid species tested, whereas the primers designed to amplify the 271 bp fragment did so exclusively for C. pyricola and its close relative, Cacopsylla pyri (Linnaeus). Both primers failed to amplify DNA from representative species of the Coccinellidae, Chrysopidae, Hemerobiidae, Anthocoridae, Miridae, Salticidae, Aphididae, Tetranychidae and the Tortricidae, suggesting their suitability for general trophic studies.

Polyphenolic Profile of Pear Leaves with Different Resistance to Pear Psylla (Cacopsylla pyri)

2015 ◽  
Vol 63 (34) ◽  
pp. 7476-7486 ◽  
Author(s):  
Milica M. Fotirić Akšić ◽  
Dragana Č. Dabić ◽  
Uroš M. Gašić ◽  
Gordan N. Zec ◽  
Todor B. Vulić ◽  
...  
Keyword(s):  
Cacopsylla Pyri ◽  
Pear Psylla ◽  
Polyphenolic Profile

scholarly journals Distribution of Population of Immature Stages of Pear Psylla, Cαcopsyllα pyri, within the Tree and Development of Sampling Strategy

2017 ◽  
Vol 10 ◽  
pp. 5 ◽  
Author(s):  
E. T. Stratopoulou ◽  
E.T. Capatos
Keyword(s):  
Second Generation ◽  
Sampling Strategy ◽  
Tree Canopy ◽  
Oviposition Period ◽  
Immature Stages ◽  
Flower Buds ◽  
Uniform Pattern ◽  
Cacopsylla Pyri ◽  
Pear Psylla ◽  
Oviposition Sites

The distribution of Cacopsylla pyri (L.) (Homoptera-Psyllidae) infestation within the tree canopy and in the varions organs of the tree was investigated in the region of Magnesia (Greece) during 1988 and 1989. The upper parts of the tree canopy and the sections ori­entated to South and west were infested heavier during winter and spring. Later in the scason the infestation was diffused within the tree canopy and at the end of the season a rather uniform pattern of distribution was observed. During the first oviposition period (February-March), the preferred oviposition sites were flower buds white during spring (second generation) they were the leaves of flower buds and young shoots. Sampling strategy for the study of populations of immature stages of pear psylla is discussed on the oasis of these findings.

scholarly journals Phenology of Population of Immature Stages of Pear Psylla, Cαcopsyllα pyri, in the Region of Magnesia (Greece)

2017 ◽  
Vol 10 ◽  
pp. 11 ◽  
Author(s):  
E. T. Stratopoulou ◽  
E.T. Capatos
Keyword(s):  
Population Density ◽  
Overlapping Generations ◽  
First Generation ◽  
Immature Stages ◽  
Basic Pattern ◽  
Environmental Pressure ◽  
Cacopsylla Pyri ◽  
Pear Psylla ◽  
Low Levels

The phenology of the population of immature stages of pear psylla, Cacopsylla pyri (L.), was studied in Greece (region of Magnesia), during the period 1988-1991 and it was found to follow a basic pattern. Pear psylla produces 5-6 gencrations per year. The first generation develops during the period February-middle April and it is quite discrets. Three overlapping generations are developed during the period front middle April until middle August but the amount of overlapping varies front year to year. Front middle August until the end of the season pear psylla produces 1-2 generations, i.e. only a part of the firth generation complotes the sixth one. Population density is generally low during the first generation but during May-June reaches verty high levels. During sommer, strong environmental pressure, supresses the population of pear psylla to low levels but it recovers again during September-October.

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