Nitrogen Fertilizer Effect on Selection, Acceptance, and Suitability of
Euphorbia pulcherrima
(Euphorbiaceae) as a Host Plant to
Bemisia tabaci
(Homoptera: Aleyrodidae)

Bentz, Jo-Ann; Reeves, J.; Barbosa, Pedro; Francis, B.A.

doi:10.1093/ee/24.1.40

Cited by 79 publications

(39 citation statements)

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“…Since plant nutrition would be expected to exert profound effects on plant growth, fertilization regimes are intended to alter the suitability or susceptibility of host plants (Hilje et al 2001). For example, relationship between host selection for oviposition site and plant growth suggested that only those plants and plant parts are selected for oviposition, which are most suitable for nymphal development (Bentz et al 1995a, b).…”

Section: Introductionmentioning

confidence: 99%

Modulating infestation rate of white fly (Bemicia tabaci) on okra (Hibiscus esculentus L.) by nitrogen application

et al. 2010

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Pests are major factor affecting the crop yield, quality, and esthetic value. Although pest resistance is genetically controlled, it is mediated through physiological and biochemical processes interrelated with the nutritional status of the plant. Nutrition of plant may determine its resistance or susceptibility to pests. An experiment was conducted to determine whether and up to what extent varying concentrations of N modulate the infesting rate of whitefly on Okra (Hibiscus esculentus). Twenty-one-dayold okra plants were subjected to five concentrations of 4, 8, 12, 16, and 20 mM N for 30 days. Number of eggs, nymph were counted on each plant after every 4 days. Growth and yield of okra plants increased with increasing supply of N but it decreased slightly at the highest level of N (20 mM). Leaf soluble proteins, amino acids, and soluble sugars were determined on fresh weight basis. From these results, it is clear that increasing N level increased the biosynthesis or accumulation of protein, free amino acid, and sugars that might have attracted more whitefly for feeding.

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Section: Introductionmentioning

confidence: 99%

Modulating infestation rate of white fly (Bemicia tabaci) on okra (Hibiscus esculentus L.) by nitrogen application

et al. 2010

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“…Nutrient limitation may alter the pattern of allocation to defense (Bryant et al 1983;Wilkens et al 1996), aect the nutritional value of foliage as food for herbivores (Bentz et al 1995;Holopainen et al 1995), or aect growth of a grazed plant (Fay et al 1996). Vesicular-arbuscular mycorrhizal (VAM) fungi are common rhizosphere microorganisms that in¯uence the availability of limiting nutrients for terrestrial plants and thus may aect susceptibility to herbivory (Gange and West 1994;Gehring and Whitham 1994).…”

Section: Introductionmentioning

confidence: 99%

A fungal root symbiont modifies plant resistance to an insect herbivore

Borowicz

1997

Oecologia

110

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Vesicular-arbuscular mycorrhizal (VAM) fungi are common root-colonizing symbionts that affect nutrient uptake by plants and can alter plant susceptibility to herbivores. I conducted a factorial experiment to test the hypotheses that colonization by VAM fungi (1) improves soybean (Glycine max) tolerance to grazing by folivorous Mexican bean beetle (Epilachna varivestis), and (2) indirectly affects herbivores by increasing host resistance. Soybean seedlings were inoculated with the VAM fungus Glomus etunicatum or VAM-free filtrate and fertilized with high-[P] or low-[P] fertilizer. After plants had grown for 7 weeks first-instar beetle larvae were placed on bagged leaves. Growth of soybean was little affected by grazing larvae, and no effects of treatments on tolerance of soybeans to herbivores were evident. Colonization by VAM fungus doubled the size of phosphorus-stressed plants but these plants were still half the size of plants given adequate phosphorus. High-[P] fertilizer increased levels of phosphorus and soluble carbohydrates, and decreased levels of soluble proteins in leaves of grazed plants. Colonization of grazed plants by VAM fungus had no significant effect on plant soluble carbohydrates, but increased concentration of phosphorus and decreased levels of proteins in phosphorus-stressed plants to concentrations similar to those of plants given adequate phosphorus. Mexican bean beetle mass at pupation, pupation rate, and survival to eclosion were greatest for beetles reared on phosphorus-stressed, VAM-colonized plants, refuting the hypothesis that VAM colonization improves host plant resistance. VAM colonization indirectly affected performance of Mexician bean beetle larvae by improving growth and nutrition of the host plant.

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“…Those include plant colour, texture, free metabolites in the sap, quantity of trichomes in the leaves, and nutritional state among others ( Van Lenteren & Noldus 1990, Bentz et al 1995, Chu et al 1995, Andres & Connors 2003 and even predation risk for the offspring (Nomikou et al 2003). The combination of these factors with abiotic agents for adult dispersal (wind, for example) may determine differential oviposition between plant species in the field (Byrne 1999).…”

Section: Discussionmentioning

confidence: 99%

Does the presence of weeds affect Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) infestation on tomato plants in a semi-arid agro-ecosystem?

Bezerra¹,

Oliveira²,

Vasconcelos³

2004

Neotrop. Entomol.

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A Presença de Plantas Invasoras Afeta a Infestação de Tomateiros por Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) em um Agro-ecossistema do Semi-árido?RESUMO -O manejo integrado de Bemisia tabaci (Gennadius) exige o conhecimento quantitativo dos mecanismos de persistência de populações em hospedeiros não comerciais. Este trabalho investigou a preferência para oviposição de B. tabaci entre tomate e quatro espécies de plantas invasoras, e a flutuação populacional do inseto em condições de campo no semi-árido nordestino. Semanalmente, foram determinados o nível (número de ovos e ninfas por folha) e a densidade de infestação (número de ovos e ninfas por área foliar) nas cinco espécies. Observamos diferentes graus de atratividade, formando um gradiente de preferência para oviposição entre as espécies, sendo Acanthospermum hispidum a espécie mais infestada e Amaranthus deflexus a menos infestada. Foi detectada ainda uma infestação significativamente mais elevada em parcelas contendo apenas tomateiros, sugerindo um efeito de diluição da infestação do tomateiro quando na presença de invasoras. Plantas invasoras podem representar importantes reservatórios para a mosca branca e/ou seus inimigos naturais, ou ainda fontes de inóculo viral para plantas cultivadas. Sua inserção em programas de manejo integrado de B. tabaci em tomateiro depende de como estes fatores podem ser manipulados para a redução dos danos causados pelo inseto.PALAVRAS-CHAVE: Mosca branca, planta daninha, preferência hospedeira, caatinga ABSTRACT -Integrated Bemisia tabaci (Gennadius) management requires quantitative knowledge on the mechanisms of persistence of pest populations in non-commercial host plants. We investigated B. tabaci oviposition preference among tomato and four weed species, and the insect population fluctuation under field conditions in the semi-arid region. At weekly intervals, we determined the level (number of eggs and nymphs per leaf) and the density of infestation (number of eggs and nymphs per leaf area) in all species. We observed an oviposition preference gradient among the species, with different degrees of attractiveness; Acanthospermum hispidum was the most infested species whereas Amaranthus deflexus was the least infested one. We also detected a significantly higher infestation on tomato when planted solely, which indicates a dilution effect on tomato infestation in the presence of weeds. Weeds can act as important reservoirs for whiteflies and/or their natural enemies or even as viral sources for cultivated plants. Their incorporation in integrated B. tabaci management programs depends on how those variables can be manoeuvred for the reduction of insect damage.

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Nitrogen Fertilizer Effect on Selection, Acceptance, and Suitability of Euphorbia pulcherrima (Euphorbiaceae) as a Host Plant to Bemisia tabaci (Homoptera: Aleyrodidae)

Cited by 79 publications

References 0 publications

Modulating infestation rate of white fly (Bemicia tabaci) on okra (Hibiscus esculentus L.) by nitrogen application

Modulating infestation rate of white fly (Bemicia tabaci) on okra (Hibiscus esculentus L.) by nitrogen application

A fungal root symbiont modifies plant resistance to an insect herbivore

Does the presence of weeds affect Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) infestation on tomato plants in a semi-arid agro-ecosystem?

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