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Bacillus thuringiensis as a pest management tool for control of the squash vine borer, Melittia cucurbitae (Lepidoptera: Sesiidae) in South Carolina

Bacillus thuringiensis als Mittel zur Bekämpfung des Kürbisstängelbohrers Melittia cucurbitae (Lepidoptera: Sesiidae) in South Carolina


A commercial formulation of Bacillus thuringiensis (Mattch) was evaluated under field conditions at Clemson, South Carolina, USA for control of the squash vine borer, Melittia cucurb-itae (Lepidoptera: Sesiidae), on yellow crookneck squash, Cucurbita pepo in 1997, 1998 and 1999. Two application methods were used: injection of the B. thuringiensis formulation directly into the main stem and spray foliage application. These were compared to an insecticide standard, endosulfan (Phaser), and an untreated check. In most cases, B. thuring-iensis treated plots had significantly less damage than untreated plots and generally gave control equal to that of the insecticide standard, endosulfan. In a trial 1998, the two methods were directly compared, the foliage sprays gave control equal to or better than the injection treatments. Even during the heaviest pest pressure (second trial, 1998), the B. thuringien-sis treatments were as effective as endosulfan in reducing the squash vine borer damage.


Eine kommerzielle Formulierung von Bacillus thuringiensis (Mattch) wurde in Kürbisfeldern in Clemson, South Carolina, USA auf ihre Eignung zur Bekämpfung des Kürbisstängelbohrers Melittia cucurbitae (Lepidoptera: Sesiidae) in den Jahren 1997, 1998 und 1999 untersucht. Zwei verschiedene Verfahren, eine direkte Injektion von B. thuringiensis in den Hauptstängel und eine Blattsprizung, wurden mit einem Endosulfanstandard (Phaser) und einer unbehandelten Kontrolle verglichen. In den meisten Fällen zeigten die mit B. thuringiensis behandelten Varianten geringere Schäden als die unbehandelte Kontrolle und waren in der Wirkung mit der Endosulfanvariante vergleichbar. Der direkte Vergleich von Injektion und Blattspritzung im Jahr 1998 zeigte eine überlegene oder zumindest vergleichbare Wirkung der Blattspritzung. Selbst während des stärksten Befallsdrucks im zweiten Versuch des Jahres 1998 zeigten sich keine Wirkungsunterschiede zwischen B. thuringiensis und Endosulfan gegenüber dem Kürbisstängelbohrer.

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Canhilal, R., Carner, G.R. Bacillus thuringiensis as a pest management tool for control of the squash vine borer, Melittia cucurbitae (Lepidoptera: Sesiidae) in South Carolina. J Plant Dis Prot 114, 26–29 (2007).

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Key words

  • Bacillus thuringiensis
  • biological control
  • Melittia cucurbitae
  • squash vine borer


  • Bacillus thuringiensis
  • biologische Bekämpfung
  • Kürbisstängelbohrer
  • Melittia cucurbitae