Approach to the Evaluation of Some Factors Affecting Insect Resistance in One ‘Acala’ and Seven Sister Genotypes of Stoneville Cotton in New Mexico

Ellington, Joe; Cárdenas, M.; Kiser, Karl; Guerra, L. H.; Salguero, Víctor; Ferguson, G.F.

doi:10.1093/jee/77.3.612

Cited by 6 publications

(5 citation statements)

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“…In several earlier studies, certain resistant plant genotypes had negative or variable effects on populations of natural enemies (Casagrande and Haynes 1976;Ellington et al 1984;Katanyukul and Thurston 1973;Obrycki and Tauber 1984;Pimentel and Wheeler 1973). Our study indicated that predators were slightly, but not significantly less abundant on resistant plants.…”

Section: Natural Enemies and Varietal Resistancesupporting

confidence: 59%

The impact of cotton plant resistance on spider mites and their natural enemies

Trichilo¹,

Leigh²

1986

Hilg

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A spider mite-resistant and a spider mite-susceptible variety of cotton were planted in the field in a replicated design. An acaricide (dicofol) and an insecticide (acephate) were used to manipulate numbers of spider mites and their natural enemies. In general, numbers of spider mites remained low until just before midseason when 650°D air temperature had accumulated. At 650°D, mite numbers began to increase more sharply and reached significantly (P

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Section: Natural Enemies and Varietal Resistancesupporting

confidence: 59%

The impact of cotton plant resistance on spider mites and their natural enemies

Trichilo¹,

Leigh²

1986

Hilg

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“…Possibly the earliest study examining the effect of plot size on studies of insect resistance in cotton was by Ellington and colleagues [7]. They concluded, within the constraints of their experiment, that most insect taxa studied displayed no significant preferences for small or large plots.…”

Section: Discussionmentioning

confidence: 99%

Effects of Field Plot Size on Variation in White Flower Anther Injury by Tarnished Plant Bug for Host Plant Resistance Evaluations in Arkansas Cotton

et al. 2014

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Field trials conducted in 2008 and 2009 investigated whether plot size affects incidence of white flower anther injury by tarnished plant bug (Lygus lineolaris (Palisot de Beauvois)) in host plant resistance (HPR) evaluations. The three cotton lines evaluated in the trial included a susceptible frego bract line (RBCDHGPIQH-197) and 2 standards, SureGrow (SG) 105 and Deltapine (DP) 393. Samplers monitored white flower anther injury between single row mini-plots embedded within multiple row max-plots. A sub-section of the max-plots was sprayed with insecticides to evaluate these tactics on altering the incidence of white flower anther injury. Plant bug numbers were very low in 2008, while infestation levels were higher in 2009. Significantly higher numbers of flowers with anther injury were observed in both years in the susceptible frego bract line compared to SG 105 and DP 393 lines. In both years, anther injury levels were similar in the maxand mini-plots, with lower levels observed in max-sprayed plots. The white flower monitoring procedure is a consistent indicator of adult plant bug preferences and is not influenced by plot size or interspersions of cultivar lines among plots.

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“…This is also supported by studies documenting that Lygus spp. have higher survival rates and occur in higher densities on glandless cotton varieties with comparatively low levels of terpenoids 31,32 .…”

Section: Discussionmentioning

confidence: 99%

“…31 and Ellington et al . 32 showed that cotton varieties with low densities of gossypol-containing pigment glands positively affect Lygus spp. performance and population size.…”

Section: Introductionmentioning

confidence: 99%

Reduced caterpillar damage can benefit plant bugs in Bt cotton

Naranjo¹,

Bacher²,

Abbott³

et al. 2019

Sci Rep

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Bt cotton was genetically modified to produce insecticidal proteins targeting Lepidopteran pests and is therefore only minimally affected by caterpillar damage. This could lead to reduced levels of inherent, systemically inducible defensive compounds in Bt cotton which might benefit other important cotton herbivores such as plant bugs. We studied the effects of plant defense induction on the performance of the plant bug Lygus hesperus by caging nymphs on different food sources (bolls/squares) of Bt and non-Bt cotton which were either undamaged, damaged by Bt tolerant caterpillars, or treated with jasmonic acid (JA). Terpenoid induction patterns of JA-treated and L . hesperus -damaged plants were characterized for different plant structures and artificial diet assays using purified terpenoids (gossypol/heliocide H1/4) were conducted. Nymphs were negatively affected if kept on plants damaged by caterpillars or sprayed with JA. Performance of nymphs was increased if they fed on squares and by the Bt-trait which had a positive effect on boll quality as food. In general, JA-sprayed plants (but not L . hesperus infested plants) showed increased levels of terpenoids in the plant structures analyzed, which was especially pronounced in Bt cotton. Nymphs were not negatively affected by terpenoids in artificial diet assays indicating that other inducible cotton responses are responsible for the found negative effects on L . hesperus . Overall, genetically engineered plant defenses can benefit plant bugs by releasing them from plant-mediated indirect competition with lepidopterans which might contribute to increasing numbers of hemipterans in Bt cotton.

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Approach to the Evaluation of Some Factors Affecting Insect Resistance in One ‘Acala’ and Seven Sister Genotypes of Stoneville Cotton in New Mexico

Cited by 6 publications

References 0 publications

The impact of cotton plant resistance on spider mites and their natural enemies

The impact of cotton plant resistance on spider mites and their natural enemies

Effects of Field Plot Size on Variation in White Flower Anther Injury by Tarnished Plant Bug for Host Plant Resistance Evaluations in Arkansas Cotton

Reduced caterpillar damage can benefit plant bugs in Bt cotton

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