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Biological control of broad mites (Polyphagotarsonemus latus) with the generalist predator Amblyseius swirskii.

van Maanen R, Vila E, Sabelis MW, Janssen A - Exp. Appl. Acarol. (2010)

Bottom Line: Several phytoseiid mites have been described to control these mites.The oviposition rate of A. swirskii on a diet of broad mites was lower than on a diet of pollen, but higher than oviposition in the absence of food.Population-dynamical experiments with A. swirskii on single sweet pepper plants in a greenhouse compartment showed successful control of broad mites.

View Article: PubMed Central - PubMed

Affiliation: Institute for Biodiversity and Ecosystem Dynamics, Science Park 904, Amsterdam, The Netherlands.

ABSTRACT
The broad mite is a serious pest of a variety of crops worldwide. Several phytoseiid mites have been described to control these mites. However, broad mites are still one of the major pest problems on greenhouse pepper in South-eastern Spain. The generalist predatory mite A. swirskii is widely used against other pests of pepper plants such as thrips and whiteflies, the latter being a vector of broad mites. We assessed the potential of A. swirskii to control broad mites. The oviposition rate of A. swirskii on a diet of broad mites was lower than on a diet of pollen, but higher than oviposition in the absence of food. Population-dynamical experiments with A. swirskii on single sweet pepper plants in a greenhouse compartment showed successful control of broad mites.

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Average number of Polyphagotarsonemus latus females (+SEM) per plant, 3 weeks after introducing broad mites and predators simultaneously (1:20 means 40 females of P. latus were introduced with 2 Amblyseius swirskii females; 1:10 means 20 P. latus females were introduced with 2 A. swirskii). Different letters indicate significant differences among treatments
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Fig2: Average number of Polyphagotarsonemus latus females (+SEM) per plant, 3 weeks after introducing broad mites and predators simultaneously (1:20 means 40 females of P. latus were introduced with 2 Amblyseius swirskii females; 1:10 means 20 P. latus females were introduced with 2 A. swirskii). Different letters indicate significant differences among treatments

Mentions: Amblyseius swirskii was very effective at controlling populations of broad mites (Fig. 2). There was a significant effect of the initial predator–prey ratio on the numbers of broad mites at the end of the experiment (KW = 12.7, df = 3, P = 0.0053). There was no significant difference in broad mite densities on plants without predators (difference in average rank = 3.75, P > 0.05). Also, the density of broad mites did not differ significantly between the two treatments with predators (difference in average rank = 4.2, P > 0.05). This is probably due to the large variation between plants within the treatment with initial ratio 1:10. Sweet pepper plants without predatory mites had significantly more broad mites than sweet pepper plants with predatory mites (KW = 12.7, df = 1, P = 0.0015). The release of predatory mites resulted in successful control of broad mites (fewer than 4 broad mites per plant) on plants with an initial ratio 1:20. After 3 weeks, the average number of predators per plant did not differ between the two treatments with predators (KW = 0.135, df = 1, P = 0.71).Fig. 2


Biological control of broad mites (Polyphagotarsonemus latus) with the generalist predator Amblyseius swirskii.

van Maanen R, Vila E, Sabelis MW, Janssen A - Exp. Appl. Acarol. (2010)

Average number of Polyphagotarsonemus latus females (+SEM) per plant, 3 weeks after introducing broad mites and predators simultaneously (1:20 means 40 females of P. latus were introduced with 2 Amblyseius swirskii females; 1:10 means 20 P. latus females were introduced with 2 A. swirskii). Different letters indicate significant differences among treatments
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC2914298&req=5

Fig2: Average number of Polyphagotarsonemus latus females (+SEM) per plant, 3 weeks after introducing broad mites and predators simultaneously (1:20 means 40 females of P. latus were introduced with 2 Amblyseius swirskii females; 1:10 means 20 P. latus females were introduced with 2 A. swirskii). Different letters indicate significant differences among treatments
Mentions: Amblyseius swirskii was very effective at controlling populations of broad mites (Fig. 2). There was a significant effect of the initial predator–prey ratio on the numbers of broad mites at the end of the experiment (KW = 12.7, df = 3, P = 0.0053). There was no significant difference in broad mite densities on plants without predators (difference in average rank = 3.75, P > 0.05). Also, the density of broad mites did not differ significantly between the two treatments with predators (difference in average rank = 4.2, P > 0.05). This is probably due to the large variation between plants within the treatment with initial ratio 1:10. Sweet pepper plants without predatory mites had significantly more broad mites than sweet pepper plants with predatory mites (KW = 12.7, df = 1, P = 0.0015). The release of predatory mites resulted in successful control of broad mites (fewer than 4 broad mites per plant) on plants with an initial ratio 1:20. After 3 weeks, the average number of predators per plant did not differ between the two treatments with predators (KW = 0.135, df = 1, P = 0.71).Fig. 2

Bottom Line: Several phytoseiid mites have been described to control these mites.The oviposition rate of A. swirskii on a diet of broad mites was lower than on a diet of pollen, but higher than oviposition in the absence of food.Population-dynamical experiments with A. swirskii on single sweet pepper plants in a greenhouse compartment showed successful control of broad mites.

View Article: PubMed Central - PubMed

Affiliation: Institute for Biodiversity and Ecosystem Dynamics, Science Park 904, Amsterdam, The Netherlands.

ABSTRACT
The broad mite is a serious pest of a variety of crops worldwide. Several phytoseiid mites have been described to control these mites. However, broad mites are still one of the major pest problems on greenhouse pepper in South-eastern Spain. The generalist predatory mite A. swirskii is widely used against other pests of pepper plants such as thrips and whiteflies, the latter being a vector of broad mites. We assessed the potential of A. swirskii to control broad mites. The oviposition rate of A. swirskii on a diet of broad mites was lower than on a diet of pollen, but higher than oviposition in the absence of food. Population-dynamical experiments with A. swirskii on single sweet pepper plants in a greenhouse compartment showed successful control of broad mites.

Show MeSH
Related in: MedlinePlus