Phenological model of pear psylla <i>Cacopsylla pyri</i>

Schaub, Lukas; Graf, B.; Butturini, A.

doi:10.1111/j.1570-7458.2005.00339.x

Cited by 25 publications

(29 citation statements)

References 17 publications

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“…The current study provides realistic information on eVect of diVerent constant temperatures on development of (3.4-3.8 for C. pyri; 1.5-2.0 for H. Wcus) and K (104.05 and 500.15 DD for eggs and larvae of C. pyri, respectively) were close to the LTT and K derived from our observations (Bonnemaison and Missonnier 1956;Berankova and Kocourek 1994;Tuncer 2002;Schaub et al 2005). Furthermore, our results on the development of E. phillyreae agree with those reported by Tzanakakis (2003) on E. olivina, a multivoltine species (embryonic development: 10-15 days; young larva to adult: 24-35 days at optimum conditions).…”

Section: Discussionsupporting

confidence: 79%

“…The development of about 50 eggs on these seedlings was studied in insect growth chamber at 16, 21 and 26°C, 60 § 5% relative humidity (RH) and a photoperiod of 16:8 h (light:dark). The emergence of Wrst instars or adults, respectively, was observed every other day at 16°C, every day at 21°C, and in the morning and evening every day at 26°C (Schaub et al 2005).…”

Section: Durations Of Egg and Larval Developmentmentioning

confidence: 99%

“…Linear regressions were applied to calculate the lower threshold temperate (LTT). Physiological times required for egg and larval development, thermal constants (K), were computed as reciprocal of the slope of the regression between temperature and development rates according to Schaub et al (2005) …”

Section: Estimating Lower Threshold Temperate and Thermal Constantmentioning

confidence: 99%

“…Clearly, an alternative method which should target larva emergences rather than waiting for honeydew droplets to appear is needed for timing insecticide applications. Many models for psyllids were predicted using means of driving variables (usually temperature), the timing of natural events, and these models have been integrated into decision-support systems (Morgan and Solomon 1993;Schaub et al 2005). Although temperature is one of the most important factors inXuencing psylla growth and development, this type of information cannot be used alone to predict pest emergence because other factors like plant phenology, nutritional, relative humidity, rainfall are often involved either alone or in combination (Kapatos and Stratopoulou 1999;Gencer et al 2007).…”

Section: Introductionmentioning

confidence: 99%

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Using degree-day accumulations and host phenology for predicting larval emergence patterns of the olive psyllid, Euphyllura phillyreae

2007

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The olive psyllid, Euphyllura phillyreae Foerster is one of the most destructive pests on buds and Xowers of olive tree (Olea europaea L.) in May when the olive growers cannot apply any insecticides against the pest. Temperature-dependent development of the psyllid was studied at constant temperatures ranged 16-26°C. A degree-day (DD) model was developed to predict the larval emergence using the weekly cumulative larval counts and daily mean temperatures. Linear regression analysis estimated a lower developmental threshold of 4.1 and 4.3°C and a thermal constant of 164.17 and 466.13 DD for development of egg and larva, respectively. The cumulative larval counts of E. phillyreae approximated by probit transformation were plotted against time, expressed as the sum of DD above 4.3°C, the starting date when the olive tree phenology was the period of Xower cluster initiation. A linear model was used to describe the relationship of DDs and probit values of larval emergence patterns of E. phillyreae and predicted that 10, 50 and 95% emergence of the larvae required 235.81, 360.22 and 519.93 DD, respectively, with errors of 1-3 days compared to observed values. Based on bioWx depends the development of olive tree phenology; the DD model can be used as a forecasting method for proper timing of insecticide applications against E. phillyreae larvae in olive groves.

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Section: Discussionsupporting

confidence: 79%

Section: Durations Of Egg and Larval Developmentmentioning

confidence: 99%

Section: Estimating Lower Threshold Temperate and Thermal Constantmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Using degree-day accumulations and host phenology for predicting larval emergence patterns of the olive psyllid, Euphyllura phillyreae

2007

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“…Non-linear functions are used for reproductive rates and survival of adults (e.g. Graf et al, 1996;Graf et al, 1999;Graf et al, 2001a;Schaub et al, 2005;Graf et al, 2006). …”

Section: Temperature-dependent Developmentmentioning

confidence: 99%

Web-Based Decision Support for Sustainable Pest Management in Fruit Orchards: Development of the Swiss System SOPRA

Samietz¹,

Graf²,

Höhn³

et al. 2011

Efficient Decision Support Systems - Practice and Challenges From Current to Future

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Ecology and biology of the parasitoid Trechnites insidiosus and its potential for biological control of pear psyllids

Tougeron

Iltis

Renoz

et al. 2021

Pest Management Science

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Pear cultivation accounts for a large proportion of worldwide orchards, but its sustainability is controversial because it relies on intensive use of pesticides. It is therefore crucial and timely to find alternative methods to chemical control in pear orchards. The psyllids Cacopsylla pyri and Cacopsylla pyricola are the most important pests of pear trees in Europe and North America, respectively, because they infest all commercial varieties, causing damage directly through sap consumption or indirectly through the spread of diseases. A set of natural enemies exists, ranging from generalist predators to specialist parasitoids. Trechnites insidiosus (Crawford) is undoubtedly the most abundant specialist parasitoid of psyllids. In our literature review, we highlight the potential of this encyrtid species as a biological control agent of psyllid pests by first reviewing its biology and ecology, and then considering its potential at regulating psyllids. We show that the parasitoid can express fairly high parasitism rates in orchards, and almost perfectly matches the phenology of its host and is present early in the host infestation season, which is an advantage for controlling immature stages of psyllids. We propose new research directions and innovative approaches that would improve the use of T. insidiosus in integrated pest management strategies in the future, regarding both augmentative and conservation biocontrol. We conclude that T. insidiosus has many advantages and should be included as part of integrated biological control strategies of pear psyllids, along with predators, in‐field habitat conservation, and the rational use of compatible chemicals. © 2021 Society of Chemical Industry.

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Phenological model of pear psylla Cacopsylla pyri

Cited by 25 publications

References 17 publications

Using degree-day accumulations and host phenology for predicting larval emergence patterns of the olive psyllid, Euphyllura phillyreae

Using degree-day accumulations and host phenology for predicting larval emergence patterns of the olive psyllid, Euphyllura phillyreae

Web-Based Decision Support for Sustainable Pest Management in Fruit Orchards: Development of the Swiss System SOPRA

Ecology and biology of the parasitoid Trechnites insidiosus and its potential for biological control of pear psyllids

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