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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 30 (1981), S. 0 
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Plots of potatoes in eastern England were covered at planting with finely slit, clear polyethylene film which remained over the foliage until harvest. Spread of potato virus Y and the numbers of aphids on the leaves in these plots were compared with those in uncovered plots. In two years fewer tubers of covered plants were infected with potato virus Y and in the first year the covered plants had fewer Myzus persicae(Sulz.) and Macrosiphum euphorbiae (Thos.).
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 30 (1981), S. 0 
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: In experiments in 1979 and 1980 in eastern England, the spread of eriophyid mites and ryegrass mosaic virus (RMV) from transplanted old sward through plots of newly sown Italian ryegrass greatly exceeded spread by windborne mites from outside the plots. During the summer and autumn of each year, mites and RMV spread at least one metre through the ryegrass (6/7 rows) from the old sward. Applying aldicarb (10 kg/ha equivalent) to the seedbed before sowing the Italian ryegrass prevented colonisation by mites and greatly decreased spread of RMV from old sward. It is concluded that old diseased swards should be completely killed before reseeding and that RMV is likely to spread quickly to plants slot-seeded into old pastures. The use of acaricides might prevent this spread but would be costly.
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Plant pathology 33 (1984), S. 0 
    ISSN: 1365-3059
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 302 (1983), S. 608-609 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] S. berthaultii is a wild tuber-bearing potato, notable for its resistance to a wide range of pests of cultivated potatoes including aphids5, leafhoppers6, flea-beetles7, Colorado potato beetles8, mites9 and thrips10. Resistance to all these pests has been associated with the abundance of glandular ...
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  • 5
    ISSN: 1573-1561
    Keywords: 1,4-Cycloaddition ; Diels-Alder reaction ; alarm pheromone ; Myzus persicae (Sulz.) ; Homoptera ; Aphididae ; sugar beet yellows virus ; potato virus Y
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract 1,4-Cycloaddition reactions between (E)-β-farnesene (the aphid alarm pheromone) and dienophiles, such as SO2 and RO·CO·C ≡ CCO·OR, gave products more stable and less volatile than the parent compound. In laboratory experiments, the numbers ofMyzus persicae (Sulz.) settling and nymphs deposited on plants were decreased by some of the reaction products. Acquisition, and thereby transmission, of the semipersistent beet yellows virus and the nonpersistent potato virus Y, was decreased.
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Potato research 23 (1980), S. 345-351 
    ISSN: 1871-4528
    Keywords: Solanum berthaultii ; Myzus persicae ; PVY
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Zusammenfassung Wie bereits früher gezeigt wurde, schützen klebrige Drüsenhaare auf den Blättern der WildkartoffelSolanum berthaultii gegen verschiedene Kartoffelschädlinge einschliesslich der Läuse; solche Haare gibt es in britischen Kartoffelsorten nicht. Ein Haartyp produziert ein klebriges Sekret an seiner Spitze, dieses Sekret kann mit Äthanol abgewaschen werden und eine ständige Berieselung mit Wasser verhindert eine Phytotoxizität. Ein zweiter Haartyp mit einer zellulären viergliedrigen Spitze wird durch das Waschen nicht beeinflusst. Drei Tage nach dem Aufsetzen von geflügeltenMyzus persicae oder geflügeltenBrachycaudus helichrysi (einem Vektor des Y-Virus der Kartoffel (PVY), der aber Kartoffeln nicht befällt) auf Planzen vonS. berthaultii oder von King Edward, blieben mehr als 85% auf mit Wasser berieseltenS. berthaultii, 45% auf mit Äthanol und Wasser gewaschenemS. berthaultii und nur 15–20% auf King Edward, unabhängig von der Behandlung (Abb. 1). Viele Läuse, die aufS. berthaultii blieben, wurden gefangen und einige hatten durch das klebrige Sekret der Drüsenhaare verschmierte Mundpartien (Abb. 2).M. persicae nahm PVY häufiger von mit Wasser und Äthanol gewaschenen infizierten Blättern vonS. berthaultii auf als von allein mit Wasser gewaschenen. Damit verbunden waren auch seltenere Probeeinstiche der Läuse in mit Wasser gewaschene Blätter, aber häufige in Blätter deren Haare von dem klebrigen Sekret durch Alkoholwaschungen befreit waren. Diese im Gewächshaus gewonnenen Ergebnisse zeigen, dass die Züchtung von Kartoffelsorten mit Drüsenhaaren, die vonS. berthaultii abstammen, helfen könnte, die Verbreitung der durch Läuse übertragbaren Viren in Kartoffelbeständen einzuschränken.
    Abstract: Résumé Des poils foliaires glandulaires de la pomme de terre sauvageSolanum berthaultii ont déjà été observés comme protégeant de nombreaux ennemis de la pomme de terre, y compris les aphides. De tels poils ne sont pas connus sur les variétés britanniques. Un type de poil produit un exudat gluant à son extrémité. Ces exudats peuvent être lessivés par l'éthanol, dont on prévient la phytotoxicité par un rinçage immédiat à l'eau. Un second type de poil à extrémité cellulaire tétralobée n'est pas affecté par un tel lessivage. Trois jours après l'installation d'ailés deMyzus persicae on d'ailés deBrachycaudus helichrysi (un vecteur du virus Y de la pomme de terre (PVY) mais qui ne colonise pas la pomme de terre) sur les plants deS. berthaultii ou King Edward, 85% environ demeurent surS. berthaultii rincée avec de l'eau, 45% restent surS. berthaultii la vée à l'éthanol et à l'eau, et seulement 15–20% se maintiennent sur King Edward, quel que soit le traitement (fig. 1). La plupart des aphides restant surS. berthaultii sont piégés, et certains ont leurs pièces buccales engluées par l'exudat des poils glandulaires (fig. 2).M. persicae se multiplie plus lentement surS. berthaultii lavé à l'eau que surS. berthaultii lavé à l'éthanol.M. persicae acquiert le PVY plus fréquemment à partir des feuilles infectées deS. berthaultii lavées à l'éthanol et à l'eau que sur des feuilles seulement lavées à l'eau. Conjointement, les aphides explorent rarement les feuilles lavées à l'eau, mais visitent volontiers les feuilles dont les poils sont dépourvus de l'exudat gluant par lavage à l'éthanol. Ces résultats en serre suggèrent que les variétés de pomme de terre avec des poils glandulaires provenant de croisements deS. berthaultii pourraient aider à réduire l'extension de virus transmis par les pucerons dans les cultures de pomme de terre.
    Notes: Summary Sticky glandular hairs on the foliage of the wild potatoSolanum berthaultii hindered the departure of wingedMyzus persicae andBrachycaudus helichrysi. The presence of sticky hairs also decreased multiplication ofM. persicae, lessened probing and lessened acquisition of potato virus Y during 5 min access periods. It is suggested that if the glandular hairs were bred into potato cultivars, these features would help restrict the spread of aphidborne viruses in crops.
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Potato research 25 (1982), S. 127-130 
    ISSN: 1871-4528
    Keywords: potato ; virus breeding ; resistance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary A clone ofSolanum berthaultii P.I. 265858 was not systemically infected when manually inoculated with isolates of PVX groups 1 to 3 but developed top-necrosis when grafted-inoculated, demonstrating it is hypersensitive. Plants sap- or graft-inoculated with an isolated of PVX group 4 or with PVXHB (a recently-discovered strain overcoming all reported sources of resistance to PVX) were infected systematically. The plants were extremely sensitive to these isolates, young leaves becoming necrotic and the plant dying within a few weeks and, whilst still alive, plants contained little virus and were a poor source of infection. These characteristics suggest that this clone could provide a means of breeding cultivars that would be protected against all known strains of PVX.
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  • 8
    Publication Date: 1983-04-01
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Springer Nature
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