Protective effects of the egg stalk ofParatrioza sinica(Hemiptera: Psyllidae) at various angles and spacings against three predaceous coccinellids,<scp>Harmonia axyridis</scp>,<scp>Coccinella septempunctata</scp>and<scp>Hippodamia variegata</scp>(Coleoptera: Coccinellidae)

Wu, Pengxiang; Ma, Baoxu; Yan, Shuo; Xu, Jun; He, Jun; Zhang, Rong; Zhang, Runzhi

doi:10.1002/ps.4713

Cited by 5 publications

(5 citation statements)

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“…However, the handling time required for H. variegata to process one psyllid is the shortest once the prey is captured, potentially attributed to its exceptional flexibility resulting from its small size. Specifically, the efficiency of H. variegata in handling the stalked eggs of psyllids was notably higher than H. axyridis [42]. Overall, three ladybird species each possess distinct advantageous traits in their predation of goji berry psyllids.…”

Section: Discussionmentioning

confidence: 89%

“…The preference of predators often lies with prey that possess more pliable bodies, as they are more readily digestible and require less energy expenditure during predation [40,41]. The ladybird consumption of psyllid eggs was observed to be the lowest, possibly attributed to the presence of an egg stalk that functions as a protective mechanism against predation by ladybirds [42].…”

Section: Discussionmentioning

confidence: 99%

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Comparison of Predatory Performance among Three Ladybird Species, Harmonia axyridis, Coccinella septempunctata and Hippodamia variegata, Feeding on Goji Berry Psyllid, Bactericera gobica

Wu,

He,

et al. 2023

Insects

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The psyllid Bactericera gobica is a serious pest in goji berry orchards. The current primary psyllid control methods involve chemical pesticides, which pose potential risks to human health and the environment. The implementation and promotion of biological control agents should receive increased attention as an alternative approach to safeguarding goji berry orchards. To compare the predatory performance of three potential biocontrol agents of psyllids, including Harmonia axyridis, Coccinella septempunctata and Hippodamia variegata, the functional response and intraspecific interactions of adult ladybirds were studied under laboratory conditions. We observed a significantly higher searching efficiency (0.84 ± 0.09) in H. axyridis when preying on psyllids compared to H. variegata (0.55 ± 0.05), whereas the handling time for psyllids was considerably longer in H. axyridis (7.33 ± 0.83 min) than in H. variegata (5.67 ± 0.97 min). The impact of intraspecific interactions on H. variegata (0.44 ± 0.04) was significantly greater than that on C. septempunctata (0.29 ± 0.03), whereas the maximum consumption by C. septempunctata (223.35 ± 41.3) significantly exceeded that of H. variegata (133.4 ± 26.9). Our study suggests that each of these three ladybird species possesses distinct advantages as a potential predator of psyllids. However, further field studies are required to determine the most promising ladybird species for rapid impact through inundative biological control, taking into consideration the specific environmental adaptability of each ladybird species. The present study is expected to provide evidence that supports the potential of incorporating promising ladybird species as an effective biological control agent in goji berry orchard management programs.

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Section: Discussionmentioning

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Comparison of Predatory Performance among Three Ladybird Species, Harmonia axyridis, Coccinella septempunctata and Hippodamia variegata, Feeding on Goji Berry Psyllid, Bactericera gobica

Wu,

He,

et al. 2023

Insects

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“…Eggs of B. gobica possess an extension of the chorion called a pedicel; the egg pedicel is inserted directly into the host plant stomata [ 26 ]. In addition to “anchoring” the egg to the host plant leaf, the primary function of the egg pedicel is to serve as the primary conduit through which moisture is absorbed from the host plant [ 27 , 28 ].…”

Section: Discussionmentioning

confidence: 99%

Positive Interactions between Aceria pallida and Bactericera gobica on Goji Berry Plants

et al. 2022

Insects

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The gall mite Aceria pallida and the psyllid Bactericera gobica are serious Goji berry pests. The mite can be phoretic on the psyllid to overwinter, but it is unclear whether the vector can obtain benefits from the phoront during the growing season. After detachment, the mite shares the same habitat with its vector, so there are very likely to be interspecific interactions. To better understand whether the interactions are positive or negative, information on relationships between abundances of A. pallida and B. gobica on leaves is needed. Here, B. gobica abundance was represented by the egg abundance because the inactive nymphs develop on the same sites after hatching. (1) We found a positive linear relationship between the gall diameter and the mite abundance in the gall (one more millimeter on gall diameter for every 30 mites increase), which provided a way to rapidly estimate mite abundances in the field by measuring gall diameters. (2) There was a positive relationship between the abundance of mites and psyllid eggs on leaves. (3) Both species had positive effects on each other’s habitat selections. More importantly, the interactions of the two species prevented leaf abscission induced by B. gobica (leaf lifespan increased by 62.9%), increasing the continuation of the psyllid population. Our study suggests positive interactions between two pests during the growing season. The positive relationship between A. pallida and B. gobica egg abundances highlights the increasing need for novel methods for Goji berry pest management. In practice, A. pallida control can be efficient by eliminating its vector B. gobica. Both pests can be controlled together, which reduces chemical usage.

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“…The type of functional response was determined by the negative or positive sign of the linear coefficient ( P 1 ) and the quadratic coefficient ( P 2 ) from the regression. A type I response has a linear coefficient where P 1 = 0, a type II response has a P 1 < 0, and a type III response has a P 1 > 0 and the quadratic coefficient ( P 2 ) < 0 [60–64]. If estimates of the linear coefficient in the original model were not significantly different from 0, the model was reduced by omitting the cubic term until the coefficients were significant [56,65–66].…”

Section: Methodsmentioning

confidence: 99%

“…The parameters a and T h were estimated by using non-linear least squares regression with the nls function in Program R [57,60,63,67]. The maximum number of attacked prey ( T/T h ) predicted by the functional response was also calculated.…”

Section: Methodsmentioning

confidence: 99%

Different predation capacities and mechanisms of Harmonia axyridis (Coleoptera: Coccinellidae) on two morphotypes of pear psylla Cacopsylla chinensis (Hemiptera: Psyllidae)

Zhang

Qin

et al. 2019

PLoS ONE

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Pear psylla, Cacopsylla chinensis (Yang & Li) are present as two seasonal morphotypes in pear orchards where they, suck phloem sap, defoliate pear trees, and cause fruit russet. Despite the importance of natural enemies in psyllid control, the interactions between predators and the two seasonal morphotypes of psyllids remain poorly documented. Here we determined the predation efficiencies of the Asian lady beetle, Harmonia axyridis (Pallas) on the two psyllid morphotypes. Predation of H . axyridis on both morphotypes conformed to a Type II functional response: the proportion of consumed psyllids decreased with increasing prey densities. Predation efficiency of H . axyridis against the winterforms increased with temperature when measured from 8 to 25°C. Predation rate on the summerforms was significantly higher than that of the winterforms. This was linked to smaller body size, higher soluble protein level, thinner cuticle, and lower chitin content of summerform psyllids compared to winterform psyllids. Predation capacities of H . axyridis on both morphotypes indicated its potential as a biocontrol agent in psyllids management. Predation efficiency was higher on summerforms, likely due to the difference in body size, exoskeleton fragility, and nutritional value between the two morphotypes. Due to the Type II functional response of H . axyridis to both morphotypes of pear psylla, application of H . axyridis in pear orchards under suitable temperatures could be taken into consideration for suppression of C . chinensis , although further experiments conducted in field conditions are needed to validate our findings.

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Protective effects of the egg stalk ofParatrioza sinica(Hemiptera: Psyllidae) at various angles and spacings against three predaceous coccinellids,Harmonia axyridis,Coccinella septempunctataandHippodamia variegata(Coleoptera: Coccinellidae)

Cited by 5 publications

References 43 publications

Comparison of Predatory Performance among Three Ladybird Species, Harmonia axyridis, Coccinella septempunctata and Hippodamia variegata, Feeding on Goji Berry Psyllid, Bactericera gobica

Comparison of Predatory Performance among Three Ladybird Species, Harmonia axyridis, Coccinella septempunctata and Hippodamia variegata, Feeding on Goji Berry Psyllid, Bactericera gobica

Positive Interactions between Aceria pallida and Bactericera gobica on Goji Berry Plants

Different predation capacities and mechanisms of Harmonia axyridis (Coleoptera: Coccinellidae) on two morphotypes of pear psylla Cacopsylla chinensis (Hemiptera: Psyllidae)

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