نتایج جستجو برای: infested leaves of tomato

تعداد نتایج: 21170824  

Journal: :Pest Management Science 2021

BACKGROUND Plants in nature can be sequentially attacked by different arthropod herbivores. Feeding one species may induce plant-defense responses that might affect the performance of a later-arriving herbivorous species. Understanding these interactions help developing pest-management strategies. In tomato, sweet-potato whitefly Bemisia tabaci and two-spotted spider mite Tetranychus urticae ar...

2003
Rosa M Rivero Juan M Ruiz Luis Romero

Grafted and non-grafted tomato plants were grown at 25 and 35 ◦C for 30 days. In tomato leaves we analysed total phenols, o-diphenols, enzymatic activities (PAL, PPO and GPX) and dry weight. Our results indicate that heat stress in both grafted and non-grafted tomato plants occurred at 35 ◦C and resulted in (1) increased PAL activity, (2) increased total phenols and o-diphenols, (3) decreased P...

Journal: :Journal of nematology 1990
J L Townshend

Oxamyl was coated on carrot (Daucus carota L. cv. Spartan Fancy-80) and tomato (Lycopersicon esculentum Mill. cv. Glamour) seeds with a polymer sticker for the control of Meloidogyne hapla. The sticker diluted in water 1:1 delayed carrot seedling emergence. Oxamyl at 40 mg/ml in a 1:5 dilution of sticker lowered the rate of carrot seedling emergence until day 13 and plant growth until day 28. O...

2014
Dorivaldo Marques da Silva Junior Inmaculada Ferriol Bryce Falk

Background Torradoviruses are an emerging group of picorna-like plant virus from the family Secoviridae that infect tomato and other Solanaceae species. The genus Torradovirus include four species: Tomato torrado virus (ToTV), first found in Europe, and afterward in Central America and Australia; Tomato apex necrosis virus (ToANV), present in Mexico; Tomato chocolate spot virus (ToChSV) and Tom...

2017
Bernardus C J Schimmel Livia M S Ataide Rachid Chafi Carlos A Villarroel Juan M Alba Robert C Schuurink Merijn R Kant

Spider mites are destructive arthropod pests on many crops. The generalist herbivorous mite Tetranychus urticae induces defenses in tomato (Solanum lycopersicum) and this constrains its fitness. By contrast, the Solanaceae-specialist Tetranychus evansi maintains a high reproductive performance by suppressing tomato defenses. Tetranychus evansi outcompetes T. urticae when infesting the same plan...

D Nabati-Ahmadi , H Rajabi-Memari , J Hayati , N Jaberolansar , SA Hosseini-Tafreshi ,

Background and Aims: Virus-Induced Gene Silencing (VIGS) is a virus vector technology that exploits antiviral defense mechanism. By infecting plants with recombinant viruses containing host genes inserted in the viral genome, VIGS achieves the RNA silencing process. The purpose of this study was to investigate the possibility of tomato (Lycopersicon esculentum Mill.) and tobacco (Nicotiana be...

2010
SEFIU A. SAHEED LISBETHM. V. JONSSON CHRISTIAAN E. J. BOTHA

The effects of feeding by the Russian wheat aphid (RWA), Diuraphis noxia Mordvilko and the Bird cherry-oat aphid (BCA), Rhopalosiphum padi L on the transport capacity of barleyHordeum vulgare L leaves were investigated and compared with a view to relating these effects to the visible symptoms shown by the respective infested plants. RWAcauses extensive chlorosis and necrosis on an infested plan...

Journal: :The Plant cell 2002
Arnaud Bovy Ric de Vos Mark Kemper Elio Schijlen Maria Almenar Pertejo Shelagh Muir Geoff Collins Sue Robinson Martine Verhoeyen Steve Hughes Celestino Santos-Buelga Arjen van Tunen

Flavonoids are a group of polyphenolic plant secondary metabolites important for plant biology and human nutrition. In particular flavonols are potent antioxidants, and their dietary intake is correlated with a reduced risk of cardiovascular diseases. Tomato fruit contain only in their peel small amounts of flavonoids, mainly naringenin chalcone and the flavonol rutin, a quercetin glycoside. To...

2012
Maria Jose Rodríguez-López Elisa Garzo Jean Patrick Bonani Rafael Fernández-Muñoz Enrique Moriones Alberto Fereres

BACKGROUND The whitefly Bemisia tabaci (Genn.) causes dramatic damage to plants by transmitting yield-limiting virus diseases. Previous studies proved that the tomato breeding line ABL 14-8 was resistant to B. tabaci, the vector of tomato yellow leaf curl disease (TYLCD). This resistance is based on the presence of type IV glandular trichomes and acylsucrose production. These trichomes deter se...

Journal: :پژوهش های تولید گیاهی 0

in the present study, effect of five isolates of trichoderma harzianum on growth parameters of tomato was carried out as cr design with six replications under greenhouse conditions. the concentrations 0.5%, 1% and 1.5% inoculums per pot were used. plant length, shoot and root fresh/dry weight, number of leaves and stem diameter as growth parameters were measured. the results showed that isolate...

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