Effect of Variations in Hooked Trichome Densities of
Phaseolus vulgaris
on Longevity of
Liriomyza trifolii
(Diptera: Agromyzidae) Adults

QulRing, Dan T.; Timmins, P. R.

doi:10.1093/ee/21.6.1357

Cited by 27 publications

(12 citation statements)

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“…Nevertheless, some generalist and specialist herbivores can circumvent trichome‐based plant defense, to the detriment of the plant . The sometimes hooked tip of non‐glandular trichomes can impede movement, interfere with feeding or ensnare arthropods . Glandular trichomes on crop and non‐crop plants can store and secrete exudates containing chemicals that repel, impede movement or even trap insects and mites, resulting in their death from desiccation or starvation .…”

Section: Introductionmentioning

confidence: 99%

Do plant trichomes cause more harm than good to predatory insects?

Riddick

Simmons

2014

Pest. Manag. Sci.

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Plants use trichomes as a morphological defense against attacks from herbivores. The literature was reviewed to test the hypothesis that trichome-bearing (pubescent) plants do not cause more harm than good to predators. Forty seven records on interactions between plant trichomes and predatory insects were found. Overall, the records reveal that trichomes have more harmful than beneficial effects on predators. Fortunately, most harmful effects are sublethal; they usually affect movement, development, oviposition and predation potential. In worst cases, sticky exudates from glandular trichomes entrap predators. The hooked tips on non-glandular trichomes impale predators. Entrapped and impaled predators often die from desiccation or starvation. Plant cultivars with high (rather than low) trichome density cause the most harm, and trichomes on tomato and some beans often cause more harm than good to predatory beetles, true bugs and lacewings. Whether these harmful effects have a net negative effect on plant fitness is poorly known and ripe for study. When developing and testing cultivars with increased trichome-based resistance to herbivory, the question as to whether these technologies are compatible with the functional role of those predators (single or combined species) capable of suppressing herbivore populations should be considered.

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Section: Introductionmentioning

confidence: 99%

Do plant trichomes cause more harm than good to predatory insects?

Riddick

Simmons

2014

Pest. Manag. Sci.

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“…Their general effect is to act as a ratchet, favouring the movement of animals, fluids or the plant itself in one direction more than in other directions (Wolgemuth, ; Hancock, Sekeroglu & Demirel, ). Anisotropic structures in plants have been shown to promote the burial of seeds in soil (Kulić et al ., ), to allow climbing plants to initiate attachment and cling to neighbouring plants (Schenck, ; Haberlandt, ; Putz, , ; Krings & Kerp, ; Bauer et al ., ), to trap or puncture small arthropods (McKinney, ; de Fluiter & Ankersmit, ; Johnson, ; Schillinger & Gallun, ; Gilbert, ; Pillemer & Tingey, , ; Sutherst & Wilson, ; Quiring, Timmins & Park, ), to guide prey insects to their doom in the leaves of carnivorous plants (Haberlandt, ; Voigt & Gorb, ; Gorb & Gorb, ; Bauer et al ., ), and to speed the drainage of water from surfaces (Hancock et al ., ).…”

Section: Introductionmentioning

confidence: 99%

Plants that lead: do some surface features direct enemy traffic on leaves and stems?

Vermeij

2015

Biol. J. Linn. Soc.

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Land plants exhibit a wide variety of defences that deter the consumption of leaves and stems, including trichomes (hairs), thorns, and thick cuticles. In many plants, trichomes are hooked or inclined to the leaf or stem surface, and the teeth on leaf margins point either apically or more rarely toward the base. The role of these anisotropic structures as potential defences has been largely ignored. In the present study, it is proposed that apically oriented surface features function as ratchets directing the movements of small herbivores toward the leaf ends and ultimately off the leaf, whereas basally oriented protrusions interfere with the ascent of consumers to the upper parts of the plant. These proposed defencive functions do not exclude other potential benefits of anisotropic features, such as self‐cleaning of surfaces. The proposed defencive role of apically oriented trichomes and teeth may represent an unusual class of physical defences that speed up rather than slow down encounters between enemies and their plant victims.

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“…Pillemer and Tingey (1976) found that hooked trichomes on the leaves of red kidney bean (P. vulgaris) and Lima bean (Phaseolus lunatus L.) trapped and caused mortality of nymphs and adults of Empoasca leafhoppers. Quiring et al (1992) showed that hooked trichomes on P. vulgaris leaves impaled and subsequently reduced the longevity of adults of an agromyzid fly, Liriomyza trifolii Burgess. Kavousi et al (2009) revealed that hooked trichomes on P. vulgaris leaves occasionally trapped and caused mortality of adults of the two-spotted spider mite, Tetranychus urticae Koch.…”

Section: Introductionmentioning

confidence: 99%

Lima bean–lady beetle interactions: hooked trichomes affect survival of Stethorus punctillum larvae

Riddick

2010

BioControl

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We tested the hypothesis that Lima bean Phaseolus lunatus L. (Henderson cultivar) trichome density affects the survival of the acariphagous lady beetle Stethorus punctillum Weise. When isolated throughout larval development, 10% or less of S. punctillum larvae reared on two-spotted spider mite Tetranychus urticae Koch on small (rather than large) P. lunatus leaves survived until pupation. Although other factors might have contributed to larval mortality, we demonstrated that survival rate was related to trichome density (i.e., number of hooked trichomes per cm on the underside of leaves). Trichome density was greatest on the underside of small leaves and least on large leaves, indicating that survival rate increased as trichome density decreased. Hooked trichomes impaled S. punctillum larvae more often at the apex of the abdomen than at any other body part. Hooked trichomes also trapped S. punctillum adults, but they always managed to free themselves. This study highlights the negative effect of Lima bean hooked trichomes on a predacious lady beetle that attacks the two-spotted spider mite.

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Effect of Variations in Hooked Trichome Densities of Phaseolus vulgaris on Longevity of Liriomyza trifolii (Diptera: Agromyzidae) Adults

Cited by 27 publications

References 0 publications

Do plant trichomes cause more harm than good to predatory insects?

Do plant trichomes cause more harm than good to predatory insects?

Plants that lead: do some surface features direct enemy traffic on leaves and stems?

Lima bean–lady beetle interactions: hooked trichomes affect survival of Stethorus punctillum larvae

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