Field evaluation of two biorational compounds in the control of pear psylla,Cacopsylla pyricola(Förster), on pear trees

Emami, Mohammad Saeed

doi:10.1080/03235408.2016.1147122

Cited by 6 publications

(4 citation statements)

References 20 publications

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“…pyricola is presently a very tiresome problem in pear-growing regions. It appears with two to five popu-lation peaks from spring to autumn depending upon latitude (Horton, 2008;Hodkinson, 2009;Emami, 2016). The cost of chemical control per hectare is annually high (Bell, 2013).…”

Section: Discussionmentioning

confidence: 99%

“…The pear psylla, Cacopsylla pyricola (Förster, 1848) (Hemiptera: Psyllidae), is a main insect pest of the planted pear (Pyrus communis L.) in the production areas of Iran (Emami, 2016), North America and Europe (Bell, 2013) with the greatest economic importance (Emami et al, 2014b). The immature psyllids and adults feed by sucking out the plant sap.…”

Section: Introductionmentioning

confidence: 99%

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Field evaluation of the relative susceptibility of six pear varieties to the pear psylla (Cacopsylla pyricola (Foerster, 1848))

Emami

2019

AAS

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The pear psylla, Cacopsylla pyricola (Foerster, 1848) (Hemiptera: Psyllidae), is one of the most detrimental pests in commercial pear orchards. Varieties with low infestation level to pear psylla would offer to integrated psyllid management. The natural infestation level of six pear varieties to pear psylla was studied under field conditions during three successive years. The pear varieties consisted of ‘Comice’, ‘Buerre Giffard’, ‘Bonne Louise’, ‘Felestini’, ‘Shahmiveh’, and ‘Sebri’. Psyllid population was sampled weekly by limb jarring method and selecting 10 leaves randomly per tree. The results indicated that the size of the psyllid population on the tested pear varieties was significantly different (F 5, 30 = 816.18, p < 0.0001). ‘Shahmiveh’ and ‘Sebri’ showed high and low susceptible, respectively, to pear psylla infestation. The natural infestation level of C. pyricola was 37.01 % and 35.8 % lower on ‘Bonne Louise’ and ‘Sebri’, respectively, than on ‘Shahmiveh’. These varieties may be used for crossing in breeding programs to develop plant resistance to C. pyricola and may be exploited in integrated psyllid management.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Field evaluation of the relative susceptibility of six pear varieties to the pear psylla (Cacopsylla pyricola (Foerster, 1848))

Emami

2019

AAS

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“…Mortality was recorded 48h after oral administration of SFX [ 29 , 33 ]. The corrected mortality percentages were calculated according to Henderson-Tilton’s equation [ 34 , 35 ] as follows: with n = number of honeybees , T = treated group , Co = control group .…”

Section: Methodsmentioning

confidence: 99%

Impairments in learning and memory performances associated with nicotinic receptor expression in the honeybee Apis mellifera after exposure to a sublethal dose of sulfoxaflor

et al. 2022

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Sulfoxaflor is a new insecticide which acts on the nicotinic acetylcholine receptor (nAChRs) in a similar way to neonicotinoids. However, sufloxaflor (SFX) is thought to act in a different manner and is thus proposed as an alternative in crop protection. The goal of this study is to evaluate the toxicity of SFX and its sublethal effect on the honeybee Apis mellifera after acute exposure. In toxicological assay studies, the LD50 value and sublethal dose (corresponding to the NOEL: no observed effect level) were 96 and 15 ng/bee, respectively. Using the proboscis extension response paradigm, we found that an SFX dose of 15 ng/bee significantly impairs learning and memory retrieval when applied 12 h before conditioning or 24 h after olfactory conditioning. SFX had no effect on honeybee olfactory performance when exposure happened after the conditioning. Relative quantitative PCR experiments performed on the six nicotinic acetylcholine receptor subunits demonstrated that they are differently expressed in the honeybee brain after SFX exposure, whether before or after conditioning. We found that intoxicated bees with learning defects showed a strong expression of the Amelβ1 subunit. They displayed overexpression of Amelα9 and Amelβ2, and down-regulation of Amelα1, Amelα3 and Amelα7 subunits. These results demonstrated for the first time that a sublethal dose of SFX could affect honeybee learning and memory performance and modulate the expression of specific nAChR subunits in the brain.

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“…Live and dead nymphs were counted and recorded under a binocular microscope. The formula used for calculating the percent reduction of pest populations, by the tested products used the following formula after Henderson and Tilton (1955), who referred to it as a modification of Abbott (1925), as commonly used for the calculation of plant protection product efficacy (Nour-Eldin, Sholla 2015;Emami 2016;Rodríguez-González et al 2017).…”

Section: Methodsmentioning

confidence: 99%

The efficacy of European fruit lecanium, Parthenolecanium corni (Bouché, 1844) control using natural products

Skalský¹,

Niedobová²,

Popelka³

2019

Hort. Sci. (Prague)

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European fruit lecanium, Parthenolecanium corni (Bouché, 1844) is among the leading worldwide pests of fruits such as plums, currants, jostaberry, grapevine and many others. This study is focused on testing the effectiveness of natural insecticide treatments compared with conventional insecticides on overwintering nymphs of the European fruit lecanium. In February of 2017, two experiments were conducted under laboratory conditions. The tested products were Boundary SW® (plant extract), Konflic® (plant extract), Ekol® (canola oil) and a tank-mix of Ekol® + Reldan 22® (canola oil and chlorpyrifos-methyl) as a chemical standard. The most effective product tested was the chemical standard tank-mix of Ekol® and Reldan 22®, which was 100% effective in all experiments. High efficiency was also achieved with Ekol® (canola oil) in high concentrations. We can summarize, that using canola oil in high concentration has almost the same effect as the chemical standard. Using canola oil against European fruit lecanium meets the principles of Integrated Pest Management (IPM) and also the need to design cropping systems that are less dependent on synthetic pesticides.

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Field evaluation of two biorational compounds in the control of pear psylla,Cacopsylla pyricola(Förster), on pear trees

Cited by 6 publications

References 20 publications

Field evaluation of the relative susceptibility of six pear varieties to the pear psylla (Cacopsylla pyricola (Foerster, 1848))

Field evaluation of the relative susceptibility of six pear varieties to the pear psylla (Cacopsylla pyricola (Foerster, 1848))

Impairments in learning and memory performances associated with nicotinic receptor expression in the honeybee Apis mellifera after exposure to a sublethal dose of sulfoxaflor

The efficacy of European fruit lecanium, Parthenolecanium corni (Bouché, 1844) control using natural products

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