Spider mite resistant maize lines, B75 and B96, maintain resistance under water-stress

Gill, Gunbharpur S.; Bui, Huyen; Clark, Richard M.

doi:10.1007/s10340-022-01584-3

Cited by 4 publications

(2 citation statements)

References 43 publications

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“…Our results suggest this could be the case for the host generalist TSM. For instance, when exposed to mite‐resistant maize lines (B96 and B75) TSM was highly sensitive to plant defence traits even with plant water stress, yet with a mite susceptible line (B73) plant water stress resulted in increased TSM populations (Gill et al., 2023). Moreover, BGM was less sensitive to mite resistant maize and water stress did not alter their response (Gill et al., 2023).…”

Section: Discussionmentioning

confidence: 99%

The effects of water‐stress, temperature, and plant traits on the outbreak potential of a specialist and generalist spider mite species (Acari: Tetranychidae)

Barnes,

Wickwar,

Yost

et al. 2023

J Applied Entomology

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The host‐generalist two‐spotted spider mite [Tetranychus urticae (Acari: Tetranychidae); TSM] and host‐specialist Banks grass mite [Oligonychus pratensis (Acari: Tetranychidae); BGM] are common pests of corn (Zea mays L.) in the arid western United States. Climate warming and decreased precipitation may promote conditions favoured by these spider mites. However, rapid evolution of spider mite resistance to commercially available acaricides is driving the need for alternative solutions for managing outbreaks. Planting of drought‐tolerant corn hybrids has been proposed to be a dual‐purpose strategy for mitigating water deficits for irrigation and reducing leaf conditions favourable for BGM outbreaks. However, understanding of the mechanisms responsible for reducing the BGM in the field is lacking and determining whether outbreaks of the TSM can also be averted using drought‐tolerant corn is a pressing concern. We conducted a 2‐year field study testing a drought‐tolerant corn hybrid and an analogous drought‐susceptible hybrid under water‐stress, with artificially infested spider mite populations. Drought‐tolerant corn had larger stem diameter, more massive cobs, and greater leaf water mass compared to the drought‐susceptible corn under water stress. We also found that the BGM populations were reduced on drought‐tolerant plants under water‐stress, as expected, but we found an opposite trend in the TSM. Lastly, water‐stressed leaves were warmer, transpired less, and had higher carbon concentration, which contributed to larger investment in eggs and growth in the BGM. We anticipate that further evaluation of irrigation and crop drought‐tolerance in management of agriculture systems for multiple pest species will be increasingly impactful in arid regions.

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Section: Discussionmentioning

confidence: 99%

The effects of water‐stress, temperature, and plant traits on the outbreak potential of a specialist and generalist spider mite species (Acari: Tetranychidae)

Barnes,

Wickwar,

Yost

et al. 2023

J Applied Entomology

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“…Soil water content did not significantly affect taxonomic richness and abundance of total soil fauna community, and abundance of each taxon, except for Mesostigmata sp.3 in this study. Numerous studies have found that soil fauna, such as Collembola (Dombos, 2001), oribatid mites (Jakšová et al, 2020), and spider mites (Gill et al, 2023) respond to changes in soil water content. However, certain studies reported that soil water content did not affect soil fauna communities (Sinka et al, 2007;Gergocs and Hufnagel, 2009).…”

Section: Discussionmentioning

confidence: 99%

Open farmland is a hotspot of soil fauna community around facility farmland during a cold wave event

Gao,

Jiang,

Sun

et al. 2023

Front. Sustain. Food Syst.

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In the future, the frequency, duration, and intensity of extreme weather may increase, thus posing a threat to soil biodiversity in farmlands, particularly in agricultural production bases. However, little is known about the effect of cold wave events on the soil fauna community compared with other extreme weathers. Laboratory experiments fail to capture the complicated field environment of cold wave events. We investigated soil fauna communities in facility farmland (strawberry) and open farmland (green cabbage) during a cold wave event in Ningbo City, southeastern China. The results showed that the taxonomic richness of the total soil fauna community in facility farmland was significantly lower than that in open farmland, but the difference in abundance was not significant. The taxonomic richness and body size of soil mites and collembolan communities in facility farmland were significantly lower than those in the open farmland. Obvious differences in abundance, mean body length, mean body width, and ratio of body width to body length of Scheloribatidae, Galumnidae, Onychiuridae, Entomobryidae, and Enchytraeidae were detected between facility farmland and open farmland. The results of this study showed that the taxonomic richness, abundance, and body size of the soil fauna community in open farmland were significantly higher than those in facility farmland during a cold wave event. We suggested that the open farmland could be a “refuge” and “hot spot” of soil fauna community during the cold wave events.

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Laboratory and field evaluation of maize resistance to the two-spotted spider mite, Tetranychus urticae

Di,

Shi,

Harwood

et al. 2023

J Pest Sci

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Spider mite resistant maize lines, B75 and B96, maintain resistance under water-stress

Cited by 4 publications

References 43 publications

The effects of water‐stress, temperature, and plant traits on the outbreak potential of a specialist and generalist spider mite species (Acari: Tetranychidae)

The effects of water‐stress, temperature, and plant traits on the outbreak potential of a specialist and generalist spider mite species (Acari: Tetranychidae)

Open farmland is a hotspot of soil fauna community around facility farmland during a cold wave event

Laboratory and field evaluation of maize resistance to the two-spotted spider mite, Tetranychus urticae

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