Resistance in Wild Brassicas to the Cabbage Whitefly, Aleyrodes Proletella.

Ramsey, A.D.; Ellis, P. R.

doi:10.17660/actahortic.1996.407.64

Cited by 21 publications

(21 citation statements)

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“…Earlier study also reported that the intrinsic rates of natural increase for silver leaf whitefly, B. argentifolii are greatly affected by temperature and the highest growth rate was found between25 to 27°C (Wang and Tsai, 1996) which is almost identical to our study temperature from February 18 to March 19, 2016 where maximum richness of whiteflies was recorded. The analogous result was also reported by Ramsey et al (1996) for cabbage whiteflies. Besides, the results explored that the whiteflies richness was statistically similar from December 30, 2015 to January 29, 2016 although their population size increased steadily (Table 1).…”

Section: Species Richness In Khulna Regionsupporting

confidence: 89%

Species richness of thrips and whiteflies and their predators in mustard fields

Das

Rahman

Kamal

et al. 2017

J Bangladesh Agric Univ

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With a view to assessing the effect of temperature (ºC) and locations on species richness of thrips and whiteflies and their natural enemies (NEs), predatory Geocoris bug and Asian lady bug beetle (LBB) in mustard field of BARI Sarisha 16, the experiment was carried out at the farmers' fields in two specific locations of Southern Bangladesh, Rupsha, Khulna and Abhaynagar, Jessore during November, 2015 to March, 2016. The studies were laid out with randomized complete block deign (RCBD) maintaining four replicates. The results depicted that there was a significant variation in mean population abundance of thrips, whitefly and their predators across the observation dates, which principally resulted from the variation of temperature along the various observation dates in each location and between locations along with phenological characters of host plants. Initially, population of thrips and whitefly, and their predators were very low in both locations at first observation date of 20 November, 2015 which gradually colonized and reached the peak in 19 March, 2016 with temperature of 27.8°C and 71% RH in Khulna and 26.1ºC and 61% RH in Jessore. Notably, temperature ranging from 22-27°C during mid-February to March, 2016 considerably favors the species richness of both insect pests, thrips and whiteflies, and their predators, Geocoris bug and Asian lady bug beetle in both places. By contrast relative low temperature of 16-20°C from December 20, 2015 to January 29, 2016 affected the species richness of predators and pest as well. The yield of mustard, BARI Sarisha 16 was significantly higher in Jessore (1365.75 kgha -1 ) due to lower pest population and higher predator population relative to Khulna region (1277.25 kgha -1 ). Ecological factors especially temperature appeared as major striking factor of species richness and played crucial role in getting up and down of mustard insect pests and NEs population across various date of observations and between places.

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Section: Species Richness In Khulna Regionsupporting

confidence: 89%

Species richness of thrips and whiteflies and their predators in mustard fields

Das

Rahman

Kamal

et al. 2017

J Bangladesh Agric Univ

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“…At the fourth instar stage they stop feeding and transform into winged adults. The whitefly's life cycle takes about 3-4 weeks depending on the temperature, and up to 4-5 generations can occur per year (Alonso et al 2009;Ramsey and Ellis 1996;Broekgaarden et al 2012). Both adults and nymphs of the cabbage whitefly cause severe cosmetic damage to Brassica crops mainly by secretion of honeydew, a sugary substance on which moulds may grow, and the wax deposited.…”

Section: Introductionmentioning

confidence: 99%

“…Physical barriers, such as leaf toughness, wax layers or trichomes, mainly serve as a first line of defence by preventing or delaying host plant colonization (Smith and Clement 2012;Voorrips et al 2008). In Brassica villosa the presence of trichomes has been associated with resistance to a range of insect pests, including the cabbage whitefly (Palaniswamy and Bodnaryk 1994;Ramsey and Ellis 1996). Chemical barriers include not only anti-feedant or repellent compounds to prevent colonization, but also toxic compounds that delay or prevent the insect's population increase (Smith and Clement 2012).…”

Section: Introductionmentioning

confidence: 99%

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Host plant resistance towards the cabbage whitefly in Brassica oleracea and its wild relatives

et al. 2014

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The cabbage whitefly (Aleyrodes proletella) is a phloem-feeding insect that is a serious problem in Brassica oleracea crops like Brussels sprouts, kale and savoy cabbage. In order to develop whiteflyresistant varieties it is essential to identify effective sources of resistance. In this study, we screened a large collection of 432 accessions, including wild material and landraces of Brassica oleracea as well as crop wild relatives, to determine whitefly performance in a no-choice field experiment. Putatively resistant accessions were further tested under greenhouse conditions. Resistant accessions were identified among B. oleracea var. capitata (cabbage) landraces and in the species B. villosa, B. incana and B. montana. Whereas resistance in cabbage is only expressed in plants of at least 12 weeks old, some wild relatives were already starting to express resistance at 6 weeks. This could open up possibilities for breeding cabbages that are resistant at a young(er) plant age. Our research also shows again the importance of crop wild relatives for finding pest resistances.

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“…Resistance to flea beetles Phyllotreta cruciferae (Goeze 1777) was found in B. incana (Bodnaryk 1992). In addition, several authors (Bodnaryk 1992;Ramsey and Ellis 1996;Pelgrom et al 2015) have reported on accessions resistant to cabbage whitefly Aleyrodes proletella (Linnaeus 1758) (Hemiptera: Aphididae) among B. oleracea var. capitata landraces and in the wild species B. villosa, B. incana, B. montana, B. cretica, B. spinosa, B. insularis and B. macrocarpa.…”

Section: Introductionmentioning

confidence: 99%

Antibiosis resistance against larval cabbage root fly, Delia radicum, in wild Brassica-species

Shuhang

Voorrips²,

Steenhuis-Broers³

et al. 2016

Euphytica

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Cabbage root flies (Delia radicum) are a major threat to cabbage production in Western Europe and North America. Host plant resistance is the most promising option in controlling cabbage root fly damage. In a no-choice field test, we evaluated 94 accessions belonging to 16 Brassica-species for antibiosis resistance against the larvae. Thirteen accessions were selected as putatively resistant, which were subsequently re-tested in the greenhouse. The proportion of eclosed flies was introduced as the main parameter to assess antibiosis in the greenhouse, together with other insect and plant parameters. High levels of antibiosis resistance were identified in B. fruticulosa PI663081 and B. spinescens BRA2994, with significantly lower proportions of eclosed flies (1 % of the number of eggs used for infestation) compared to other accessions. Both species are difficult to cross with B. oleracea. Plants with a high level of antibiosis and medium to high tolerance were found in several accessions of other Brassica species (B. villosa BRA2922, B. montana BRA2950, B. hilarionis HRIGU12483, B. macrocarpa BRA2944) which are more amenable for crossing with B. oleracea. Selection of the most resistant plants belonging to these accessions may yield promising candidates for breeding cabbages resistant to Delia radicum.

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Resistance in Wild Brassicas to the Cabbage Whitefly, Aleyrodes Proletella.

Cited by 21 publications

References 0 publications

Species richness of thrips and whiteflies and their predators in mustard fields

Species richness of thrips and whiteflies and their predators in mustard fields

Host plant resistance towards the cabbage whitefly in Brassica oleracea and its wild relatives

Antibiosis resistance against larval cabbage root fly, Delia radicum, in wild Brassica-species

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