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<p>Edaphic predatory mites serve as effective biocontrol agents of acarid mites infesting flower bulbs. This study aimed to evaluate whether the predatory mite <i>Blattisocius mali</i> could control the mould mite <i>Tyrophagus putrescentiae</i> infesting lily and tulip bulbs. The experiment was conducted using plastic containers, each containing three tulip or lily bulbs. Motiles of <i>T. putrescentiae</i> were released onto each bulb, and after seven&#xa0;days <i>B. mali</i> adults were introduced at predator-to-prey ratios of 1:20 or 1:40. The containers were kept in darkness at 26&#xa0;°C, an optimal temperature for both predator and prey. The trials with lilies were conducted in combination with or without peat, at a predator-to-prey ratio of 1:40. In contrast, the trials with tulips were conducted without peat, but in two combinations of 1:20 or 1:40 predator-to-prey ratios. At predator-to-prey ratios of 1:40, almost complete eradication of the prey occurred after 25&#xa0;days on both tulip and lily bulbs, whereas at a higher ratio, such as 1:20 in tulips, a similar effect was observed after 15&#xa0;days. The effectiveness values of <i>B. mali</i> in controlling <i>T. putrescentiae</i> were 93.75% and 91.98% in lily bulbs stored without peat and with peat, respectively, while these were 92.70% and 95.01% in tulip bulbs with predator-to-prey ratios of 1:40 and 1:20, respectively. This study suggests that <i>B. mali</i> might be highly effective in controlling <i>T. putrescentiae</i> in both lily and tulip bulbs. To confirm this, however, further tests at a larger spatial scale and across various temperature regimes are needed.</p>

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Evaluation of the predatory soil mite Blattisocius mali (Acari: Blattisociidae) as a biocontrol agent of the acarid mite Tyrophagus putrescentiae (Acari: Acaridae) infesting stored flower bulbs

  • 期刊论文

  • 发表日期：

    2026年4月18日

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  • Manoj Kumar Jena,
  • Marcin Studnicki,
  • Dariusz Sochacki,
  • Katarzyna Michalska

摘要

Edaphic predatory mites serve as effective biocontrol agents of acarid mites infesting flower bulbs. This study aimed to evaluate whether the predatory mite Blattisocius mali could control the mould mite Tyrophagus putrescentiae infesting lily and tulip bulbs. The experiment was conducted using plastic containers, each containing three tulip or lily bulbs. Motiles of T. putrescentiae were released onto each bulb, and after seven days B. mali adults were introduced at predator-to-prey ratios of 1:20 or 1:40. The containers were kept in darkness at 26 °C, an optimal temperature for both predator and prey. The trials with lilies were conducted in combination with or without peat, at a predator-to-prey ratio of 1:40. In contrast, the trials with tulips were conducted without peat, but in two combinations of 1:20 or 1:40 predator-to-prey ratios. At predator-to-prey ratios of 1:40, almost complete eradication of the prey occurred after 25 days on both tulip and lily bulbs, whereas at a higher ratio, such as 1:20 in tulips, a similar effect was observed after 15 days. The effectiveness values of B. mali in controlling T. putrescentiae were 93.75% and 91.98% in lily bulbs stored without peat and with peat, respectively, while these were 92.70% and 95.01% in tulip bulbs with predator-to-prey ratios of 1:40 and 1:20, respectively. This study suggests that B. mali might be highly effective in controlling T. putrescentiae in both lily and tulip bulbs. To confirm this, however, further tests at a larger spatial scale and across various temperature regimes are needed.