Intraspecific variation in Trifolium pratense: impact on feeding and host location by Sitona lepidus (Coleoptera, Curculionidae)

Murray, P. J.; Cheung, A. K. M.; Abberton, Michael T.

doi:10.1007/s10340-006-0153-6

Cited by 18 publications

(12 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This would lead to smaller and less-fit adults at the mass emergence in late spring/ early summer or delayed pupation at other times of the year. In no-choice feeding situations such as the present experiments and those of Murray et al (2007), CRW larvae will feed on red clover nodules and roots. The oestrogen content of red clover leaves acts as a deterrent to CRW adult feeding, and increased levels of oestrogens have been measured in red clover Crush et al 2006).…”

Section: Discussionmentioning

confidence: 95%

Effect of clover root weevil larval feeding on growth of clover progenies from parents selected for tolerance in field trials

Crush

Gerard

Ouyang

et al. 2010

New Zealand Journal of Agricultural Research

View full text Add to dashboard Cite

The effects of larval herbivory by clover root weevil (CRW, Sitona lepidus) on seven white clover (Trifolium repens) and two red clover (Trifolium pratense) progenies from plants showing tolerance of CRW in field trials were tested in two controlled glasshouse experiments. CRW larvae recovered from red clover plants were, on average, fewer (6.3 larvae/g root dry weight) and shorter (5.7 mm/g root dry weight) than those from white clover (16.7 larvae, 7.1 mm length).This confirmed previous findings that red clover is an inferior host for this pest. In the first experiment, progeny of four of the white clover selections for CRW tolerance showed high tolerance (shoot dry weights (2.9% to '3.1% different from their respective weevil-free controls) compared with a 13Á24% shoot weight loss for two white clover cultivars. These results confirm field trial observations that there is variation for CRW tolerance in white clover and also that CRW tolerance is hereditable in at least some populations. The second experiment, on a smaller subset of white clovers, showed little effect of CRW on either the tolerant clover selections or the cultivar controls. An index of larval feeding pressure (larval numbers)larval projected areas/root dry weight) gave much lower values for the second experiment (12Á78 mm 2 / g) than for the first (69Á102 mm 2 /g). The absence of negative effects of CRW on the cultivar controls in experiment 2 was assumed to result from low CRW feeding pressure, allowing compensatory growth responses. A small but consistent increase in shoot: root ratio in the 'CRW treatment in experiment 1 provided supporting evidence for increased allocation to shoots as a mechanism for plants to reduce the impact of root herbivory. IntroductionEvaluations of white clover (Trifolium repens) and red clover (T. pratense) cultivars and experimental lines in on-farm trials in Northland (Cooper et al. 2003) and the Waikato (Crush et al. 2004 in the presence of clover root weevil (CRW, Sitona lepidus) showed differences among plant types. Vigorous, well-adapted white clovers are more tolerant of CRW than are less vigorous or poorly adapted white clovers, and red clover is more tolerant of

show abstract

Section: Discussionmentioning

confidence: 95%

Effect of clover root weevil larval feeding on growth of clover progenies from parents selected for tolerance in field trials

Crush

Gerard

Ouyang

et al. 2010

New Zealand Journal of Agricultural Research

View full text Add to dashboard Cite

show abstract

“…There are also within-species differences. For instance, reduced feeding, adult longevity and oviposition have been associated with red clover T. pratense L. breeding lines containing high phyto-oestrogen levels (Gerard et al 2005;Murray et al 2007). In contrast, S. viridis has a wide host range (Holdaway 1927).…”

Section: Discussionmentioning

confidence: 99%

Investigations into suitability of <i>Trifolium occidentale</i> as a host plant for two common pasture pests

Gerard

O’Donnell

2014

NZPP

View full text Add to dashboard Cite

Western clover (Trifolium occidentale) is a diploid perennial clover that is reported to be one of the progenitors of white clover (Trifolium repens). The ability to produce hybrids between T. repens and T. occidentale provides an opportunity to introduce factors to improve white clover tolerance to common stress factors. A series of assays was undertaken to compare the feeding and performance of two contrasting pests on two T. occidentale lines and two T. repens cultivars. Clover root weevil (Sitona lepidus) adults showed a preference for T. repens, but this diminished if weevils had been previously exposed to T. occidentale. Weevil longevity, feeding levels and oviposition were comparable over 32 days, indicating T. occidentale is a host plant for adult S. lepidus. Clover flea (Sminthurus viridis) showed a strong preference for T. repens over T. occidentale in a choice test and higher feeding levels on T. repens in the no-choice test.

show abstract

“…First, instar larvae of S. lepidus severely impair the capacity of white clover to fix atmospheric nitrogen, by preferentially attacking root nodules containing symbiotic Rhizobium spp. bacteria (Gerard 2001;Murray et al 2007). This and subsequent feeding on the root system by the later instars has a significant role in reducing dry matter production and clover persistence (Leydlaw and Mowat 1991;Gerard et al 1999a, b) and can impose significant losses in pastoral industries dependent on white clover (Goldson et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Determining suitability of thermal development models to estimate temperature parameters for embryonic development of Sitona lepidus Gyll. (Coleoptera: Curculionidae)

Arbab

McNeill

2011

J Pest Sci

View full text Add to dashboard Cite

The clover root weevil, Sitona lepidus Gyll. is a pest of clovers (Trifolium spp.), particularly white clover (T. repens). Larva feeding severely impairs the capacity of white clover to fix atmospheric nitrogen, by attacking the nitrogen-fixing root nodules. Development of the egg stage was studied at six different constant temperatures ranging from 9 to 30°C to improve the basis for phenological forecasts. Development occurred over the entire range of temperatures, although hatching percentage at 30°C was only 24.4% compared to 90.1% at 28.5°C. Developmental time decreased with increase in temperature from 9 to 28.5°C but increased markedly at 30°C. At 28.5°C, the embryo development period was the shortest (10.35 days); whereas at 9°C, this parameter was the longest (55.08 days). Using linear regression, the lower threshold temperature was calculated 4.38°C and the thermal constant was 236.45 degree-days. The relationship between constant temperature and developmental rate was evaluated using nine models. The suitability of the models was evaluated based on eight indicators (R 2 , RSS, R adj 2 , AIC, BIC, AICC, W j , and Z i ). Of the nonlinear models, the Logan-6, Sharpe and DeMichele, and Lactin models were the most accurate at calculating t opt of 27, 27.50, and 28°C, respectively. The results suggest that of the three models (Lactin, Briere, and Hilbert and Logan), that estimated critical temperatures, (t min , t opt , and t max ), Lactin gave the most suitable fit of data. This response of S. lepidus to temperature can be used for developing phonological models to predict the timing of egg hatch which are important for management programs targeting the weevil.

show abstract

Intraspecific variation in Trifolium pratense: impact on feeding and host location by Sitona lepidus (Coleoptera, Curculionidae)

Cited by 18 publications

References 13 publications

Effect of clover root weevil larval feeding on growth of clover progenies from parents selected for tolerance in field trials

Effect of clover root weevil larval feeding on growth of clover progenies from parents selected for tolerance in field trials

Investigations into suitability of <i>Trifolium occidentale</i> as a host plant for two common pasture pests

Determining suitability of thermal development models to estimate temperature parameters for embryonic development of Sitona lepidus Gyll. (Coleoptera: Curculionidae)

Contact Info

Product

Resources

About