Impact of flowers on the demography of western flower thrips Frankliniella occidentalis (Thysan., Thripidae)

Abstract

The impact of~owers on the population growth of Frankliniella occidentalis was characterized on wax~ower plants\ Impatiens walleriana[ In the presence of~owers\ the populations grew exponentially while in their absence\ the thrips populations only maintained themselves and showed no growth The di}erence in number and in size of thrips reared in both conditions suggested that the~owers were essential for the success of thrips development[ In the presence of~owers\ the distribution of females between the leaves and the~owers varied strongly according to the availability of owers[ By contrast\ the proportion of _rst larvae in the~owers increased up to the last day of the experiment[

Sampling Techniques for Thrips (Thysanoptera: Thripidae) in Preflowering Tomato

“…In this study, the r value of F. occidentalis and F. intonsa was higher on cucumber leaves than that on tomato leaves, especially for F. intonsa, which is low to 0.01 on tomato leaf, this means the not suitable of tomato leaf for population development, but slowly population development would be improved in fields when added with pollens as reported in F. occidentalis (Gerin et al 1999, Hulshof et al 2003, Zhi et al 2005.…”

Biologia e tabela de vida de fertilidade de Frankliniella occidentalis (Pergande) (Thysanoptera, Thripidae) em morangueiro

“…O alimento ingerido na fase larval afeta, não só o tempo de desenvolvimento, mas também o tamanho corporal do tripes. Assim, larvas maiores e mais rápidas são potencialmente menos suscetíveis a serem predadas por seus inimigos naturais (Gerin et al 1999;de Kogel et al 1999;Hulshof et al 2003).…”

Invasion ecology of thrips in relation to seedling cotton

“…Both larval and adult thrips of all species were predominantly found on inflorescences of their host plants rather than leaves (Figures 6.23 & 6.24). Previous studies have shown that most thrips species, including the ones investigated in the current study feed primarily on pollen and are associated with flowers (Yudin et al, 1986;Gerin et al, 1999;Milne et al, 1996). This could be the reason why large numbers of thrips were found on the flowers of weed species compared to the leaves.…”

“…This could be the reason why large numbers of thrips were found on the flowers of weed species compared to the leaves. Gerin et al (1999) showed that flowers impacted the population growth of F. occidentalis;…”

“…Flowers are essential for the success of thrips development (Gerin et al, 1999;Lewis, 1997), for example, F. schultzei has been shown to perform better on floral tissue than on leaf tissue . It has even been shown that in the absence of flowers, thrips colonization is reduced, implying that thrips respond directly to flowers (Yudin et al, 1988).…”