Categories of Resistance to Biotype I Greenbugs (Homoptera: Aphididae) in Wheat Lines Containing the Greenbug Resistance Genes<i>Gbx</i>and<i>Gby</i>

Boina, Dhanaraj; Prabhakar, Sheila; Smith, C. Michael; Starkey, Sharon; Zhu, Lieceng; Boyko, Elena V.; Reese, John C.

doi:10.2317/0404.19.1

Cited by 18 publications

(11 citation statements)

References 8 publications

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“…Many researchers have observed reductions in chlorophyll content due to pest attack (Flinn et al, 2001;Boina et al, 2005;DiazMontano et al, 2007;López et al, 2009). These authors agree that susceptible plant cultivars tend to show greater reductions in chlorophyll levels than tolerant cultivars do when attacked by pests (Flinn et al, 2001;Boina et al, 2005;Diaz-Montano et al, 2007;López et al, 2009). For example, Resende et al (2012) recorded a reduction of up to 81 % in chlorophyll levels in Brachiaria ruziziensis due to attack by M. spectabilis adults.…”

Section: Resultsmentioning

confidence: 99%

Resistance mechanisms of sugarcane cultivars to spittlebug Mahanarva fimbriolata

Dinardo-Miranda¹,

Fracasso²,

Pérecin

et al. 2016

Sci. agric. (Piracicaba, Braz.)

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The spittlebug Mahanarva fimbriolata (Stål) (Hemiptera: Cercopidae) is one of the most important pests of sugarcane in Brazil. Measures for population control are currently restricted to the use of chemical insecticides and fungus Metarhizium anisopliae, in part because very little information exists regarding resistance of sugarcane cultivars. Therefore, the aim of this study was to evaluate resistance mechanisms of 12 different sugarcane cultivars to M. fimbriolata to provide information for growers for pest management. Isolated buds of each cultivar were planted in pots and kept in a greenhouse for approximately three months. The pots were then moved to climate test chambers (26 ± 1 ºC; 70 ± 10 % relative humidity; 12 h photoperiod) to carry out laboratory tests to evaluate adult feeding and female oviposition preferences (using both free-choice and no-choice tests) as well as the effects of cultivars on nymph development and cultivars tolerance to pest attack. The least attractive cultivars for adult feeding were

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Section: Resultsmentioning

confidence: 99%

Resistance mechanisms of sugarcane cultivars to spittlebug Mahanarva fimbriolata

Dinardo-Miranda¹,

Fracasso²,

Pérecin

et al. 2016

Sci. agric. (Piracicaba, Braz.)

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“…Several studies have revealed numerous factors that produce natural resistance against herbivores in different cultivars of plants (e.g., Vieira et al 2009;Reinert et al 2008;Boina et al 2005;Hennessey et al 1995;Erb et al 1994). Growing resistant cultivars on a commercial scale has been regarded as a successful and low-cost measure for controlling pests.…”

Section: Introductionmentioning

confidence: 99%

Seasonal suitability of three rubber tree clones to Calacarus heveae (Acari, Eriophyidae)

2011

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The suitability of rubber tree clones to Calacarus heveae was inferred from the life cycle, reproduction and survivorship of this mite. The assays were performed under controlled conditions with leaflets detached from 6-year-old plants. The development of 20 C. heveae individuals on each of the clones GT 1, PB 235 and RRIM 600 was analysed. This experiment was performed four times during periods when C. heveae was abundant in the field: (P1) November-December 2005, (P2) January-February, (P3) March-April and (P4) May-June 2006. Accordingly, the leaflets used in each assay represented the physiological condition of the host plant during each period. This approach allowed us to evaluate the seasonal suitability of rubber tree clones to C. heveae. We observed seasonal differences in the suitability of rubber tree clones to mite attack. The mites reared on the PB235 had a shorter development period, the highest egg production and highest survivorship. This evidence showed that the PB 235 was the most suitable of those tested. We also observed that the leaflets used in the assays during periods P2 and P3 were the most favourable for the development of C. heveae. This finding emphasises the seasonal suitability of rubber tree leaflets. On the other hand, GT 1 showed higher resistance against C. heveae than did RRIM 600 and PB 235, primarily during the period from November to February. This result indicated that use of the GT 1 clone to control the mite might represent an alternative for growers.

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“…Namely, infested plots showed on average 46% less leaf chlorophyll and 36% aboveground biomass than uninfested plots. Many researchers have observed reductions in chlorophyll content due to pest attack, as Boina et al (2005), Diaz-Montano et al (2007) and Lópes et al (2009). Resende et al (2012) recorded a reduction up to 81% in chlorophyll leaves content in Brachyaria ruziziensis due to M. spectabilis adults.…”

Section: Cultivar Eggs Per Plant Eggs Viability (%)mentioning

confidence: 97%

Resistance of sugarcane cultivars to Mahanarva fimbriolata

Dinardo-Miranda¹,

Fracasso²,

Pérecin

et al. 2018

Bragantia

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photoperiod) to carry out laboratory tests to evaluate adult feeding and female oviposition preferences (using both free-choice and no-choice tests) as well as the effects of the cultivars on nymph development and the cultivars tolerance to the pest attack. The least attractive cultivar for adult feeding and oviposition in free-choice test was RB867515, which was also one of those that received the fewest eggs in the no-choice oviposition tests. Cultivar CTC9 showed the highest level of antibiosis resistance, with a root nymph survival rate of 52.5%. Finally, cultivar RB966928 was the most tolerant to M. fimbriolata, but it showed 19% reduction in aboveground biomass weight due to the pest.

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Categories of Resistance to Biotype I Greenbugs (Homoptera: Aphididae) in Wheat Lines Containing the Greenbug Resistance GenesGbxandGby

Cited by 18 publications

References 8 publications

Resistance mechanisms of sugarcane cultivars to spittlebug Mahanarva fimbriolata

Resistance mechanisms of sugarcane cultivars to spittlebug Mahanarva fimbriolata

Seasonal suitability of three rubber tree clones to Calacarus heveae (Acari, Eriophyidae)

Resistance of sugarcane cultivars to Mahanarva fimbriolata

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