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Background <p>The broomrape, <i>Orobanche crenata</i> Forsk. (Orobanchaceae) is a noxious root parasite weed which seriously damages the productivity of many crops, particularly in the Legumes such as faba bean <i>Vicia faba</i>. The parasitism caused by this weed leads to significant yield losses in infested fields.</p> Results <p>This study investigated the natural occurrence and infestation dynamics of the fly, <i>Phytomyza orobanchia</i> Kalt. in faba bean fields naturally infested by the parasitic weed <i>O. crenata.</i> The study was conducted during three successive faba bean seasons, 2020–2023 during, February, March, and April in two locations; Abies and Nubaria farms. The fly populations were generally low in the three seasons in February, increase to its maximum in late March in the 1st season and in April during the 2nd and 3rd seasons. In Nubaria farm, most larvae and puparia of <i>Ph. orobanchia</i> fly were found within the seed capsules of the <i>O. crenata</i>, with significantly lower proportions in plant base and stem parts. The fly preferred to attack the middle and upper fruits than lower ones. In contrast, at Abies farm, most of <i>Ph. orobanchia</i> flies were significantly found at plant base followed by seed capsules, and the lowest proportion was in the plant stem.</p> Conclusions <p>Infestation with <i>Ph. orobanchia</i> fly is efficient in reducing <i>Orobanche</i> seed yield so it has a great effect in the reduction of <i>Orobanche</i> seed bank. The findings suggested that the fly, <i>Ph. orobanchia</i> could serve as a promising biological control agent for <i>Orobanche</i> spp. in Egypt, especially when combined with cultivation of resistance faba bean cultivars and the application of mass rearing and release program in infested areas.</p>

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Field assessment of Phytomyza orobanchia Kalt. (Diptera, Agromyzidae) as a natural enemy of the parasitic weed Orobanche crenata Forsk. (Orobanchaceae)

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  • 发表日期：

    2026年3月17日

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  • Esmat Mohamed Hussein Hegazi,
  • Wedad Emam Khafagi,
  • Safaa Moustafa Abd El-Rahman,
  • Sania Fateh Allah Showiel,
  • Manal Ahmed Attia,
  • Mervat Abo Elhamed Hasaneen,
  • Amany Mostafa Abu Shall,
  • Mohamed Awad Al Eryan,
  • Marwa M A Farag

摘要

Background

The broomrape, Orobanche crenata Forsk. (Orobanchaceae) is a noxious root parasite weed which seriously damages the productivity of many crops, particularly in the Legumes such as faba bean Vicia faba. The parasitism caused by this weed leads to significant yield losses in infested fields.

Results

This study investigated the natural occurrence and infestation dynamics of the fly, Phytomyza orobanchia Kalt. in faba bean fields naturally infested by the parasitic weed O. crenata. The study was conducted during three successive faba bean seasons, 2020–2023 during, February, March, and April in two locations; Abies and Nubaria farms. The fly populations were generally low in the three seasons in February, increase to its maximum in late March in the 1st season and in April during the 2nd and 3rd seasons. In Nubaria farm, most larvae and puparia of Ph. orobanchia fly were found within the seed capsules of the O. crenata, with significantly lower proportions in plant base and stem parts. The fly preferred to attack the middle and upper fruits than lower ones. In contrast, at Abies farm, most of Ph. orobanchia flies were significantly found at plant base followed by seed capsules, and the lowest proportion was in the plant stem.

Conclusions

Infestation with Ph. orobanchia fly is efficient in reducing Orobanche seed yield so it has a great effect in the reduction of Orobanche seed bank. The findings suggested that the fly, Ph. orobanchia could serve as a promising biological control agent for Orobanche spp. in Egypt, especially when combined with cultivation of resistance faba bean cultivars and the application of mass rearing and release program in infested areas.