Parasitation Rate of the Larvae of Pear Psylla (Cacopsylla Piri (L.)) in Orchards With Differing Intensity of Chemical Control

Jaworsks, K.; Olszak, R.W.; Zajac, R.Z.

doi:10.17660/actahortic.1996.422.66

Cited by 2 publications

(1 citation statement)

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“…The first generation of T. insidiosus is not susceptible to hyperparasitism [66,68] and is active in the initial phases of pear development when no other active parasitoids or predators are present [19]. Several studies indicate an extremely high level of parasitism by T. insidiosus, which, according to various authors, ranges from 30 to even 100% [21,73,79,80], highlighting the high efficiency of this parasitoid in controlling psylla populations [81]. Despite its pronounced potential and favourable biological characteristics for commercial application, only a few laboratory studies have been conducted on the behaviour of T. insidiosus in parasitising the pear psylla [19].…”

Section: Parasitoids Of the Pear Psyllamentioning

confidence: 99%

Natural Enemies of the Pear Psylla, Cacopsylla pyri (Hemiptera: Psyllidae), and the Possibilities for Its Biological Control: A Case Study Review in the Western Balkan Countries

Krndija,

Ivezić,

Sarajlić

et al. 2024

Agronomy

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The accessible literature covered in this paper commonly highlights psyllids as a significant group of insects affecting pear trees, posing a continual challenge for commercial orchards. With the development of modern pear cultivation systems, Cacopsylla pyri Linnaeus 1758 (Hemiptera: Psyllidae) has emerged as a major pest in pear orchards across many European countries, including those in the Western Balkans. For years, the agricultural sector has primarily relied on chemical insecticides to control pear psyllas, but these methods often fail to produce satisfactory results. This is largely due to C. pyri’s rapid development of resistance to chemical treatments. Consequently, modern agriculture is increasingly shifting towards biological methods to manage C. pyri, involving the identification and conservation of its natural enemies. Although there is an abundance of research on the natural predators of C. pyri and their biocontrol applications across the globe, the Western Balkan region has conducted relatively few studies on the subject. Globally, various parasitoids, predators, and entomopathogenic fungi are often cited as effective against C. pyri. Specific species registered in the agroecological conditions of the Western Balkans include parasitic wasps such as Trechnites insidiosus Crawford, 1910 (Hymenoptera: Encyrtidae) and Prionomitus mitratus Dalman, 1820 (Hymenoptera: Encyrtidae), as well as the predatory bug Anthocoris nemoralis Fabricius, 1794 (Hemiptera: Anthocoridae). However, most Balkan countries have yet to fully utilise the potential of beneficial entomofauna or develop strategies for their commercial application at a national level. Considering that C. pyri is a major pest in pear cultivation and its natural enemies have not been thoroughly explored in most of the Western Balkans, this paper aims to review the literature data on available natural enemies of pear psyllas and to highlight and promote their undeniable potential in biological control.

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Section: Parasitoids Of the Pear Psyllamentioning

confidence: 99%

Natural Enemies of the Pear Psylla, Cacopsylla pyri (Hemiptera: Psyllidae), and the Possibilities for Its Biological Control: A Case Study Review in the Western Balkan Countries

Krndija,

Ivezić,

Sarajlić

et al. 2024

Agronomy

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Effect of the instar of the pear psyllid Cacopsylla pyri (Hemiptera: Psyllidae) on the behaviour and fitness of the parasitoid Trechnites insidiosus (Hymenoptera: Encyrtidae)

Goff¹,

Berthe²,

Tougeron³

et al. 2021

Eur. J. Entomol.

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Improved methods of integrated pest management of the pear psyllid Cacopsylla pyri (L.), the primary pest of pear in Europe and North America, are needed. Trechnites insidiosus (Crawford) is the most abundant parasitoid of C. pyri in pear orchards, where it is present early in the psyllid infestation period. However, little is known about its general biology, interaction with its host and potential as a control agent. The objective of this laboratory study was to evaluate the behaviour of a specialist parasitoid when presented with different larval instars of C. pyri, and assess the quality of the next generation of parasitoids. T. insidiosus was able to insert its ovipositor into all host instars. However, the fourth instar of the host appeared to be the most suitable in terms of behavioural acceptance, time spent walking, antennal activity and progeny development (mummy formation, development time and tibial length). In addition, we report a low frequency of host-feeding behaviour by this parasitoid. From a biological control perspective, we suggest that favouring T. insidiosus, either through mass releases or conservation of naturally present populations, when the fi rst generation of psyllids reach the fourth instar, would maximize the chance of controlling psyllid populations in pear orchards.

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Parasitation Rate of the Larvae of Pear Psylla (Cacopsylla Piri (L.)) in Orchards With Differing Intensity of Chemical Control

Cited by 2 publications

References 0 publications

Natural Enemies of the Pear Psylla, Cacopsylla pyri (Hemiptera: Psyllidae), and the Possibilities for Its Biological Control: A Case Study Review in the Western Balkan Countries

Natural Enemies of the Pear Psylla, Cacopsylla pyri (Hemiptera: Psyllidae), and the Possibilities for Its Biological Control: A Case Study Review in the Western Balkan Countries

Effect of the instar of the pear psyllid Cacopsylla pyri (Hemiptera: Psyllidae) on the behaviour and fitness of the parasitoid Trechnites insidiosus (Hymenoptera: Encyrtidae)

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