Tomato wild relatives are important sources of resistance to many pests cultivated tomato [Solanum lycopersicum L. (syn. Lycopersicon esculentum Mill.)]. Eleven accessions previously identified at AVRDC—The World Vegetable Center as resistant Bemisia tabaci were evaluated for the two-spotted spider mite [Tetranychus urticae (Koch.)] based on egg numbers using leaf disc and Tanglefoot no-choice bioassays, damage scores in choice bioassays. Highest bioassays was AVRDC S. galapagense VI057400,...

The sweetpotato whitefly, Bemisia tabaci Genn., is a major pest of tomato (Solanum lycopersicum) and other crops throughout the tropics subtropics. objectives this study were to characterize 255 accessions S. galapagense, cheesmaniae pimpinellifolium for trichome types, evaluate selected with high densities glandular trichomes resistance whitefly. Twenty-two classified as either sparse or abundant type IV evaluated numbers adults, eggs, nymphs, puparium whitefly in choice bioassays, adult...

Abstract This study provides insights in patterns of distribution abiotic and biotic stress resilience across Vigna gene pools to enhance the use conservation these genetic resources for legume breeding. is a pantropical genus with more than 88 taxa including important crops such as V. radiata (mung bean) unguiculata (cowpea). Our results show that sources pest disease resistance occur at least 75 percent taxa, which were part screening assessments, while less 30 screened taxa. difference...

Improving the productivity of cucumber (Cucumis sativus L.) plants subjected to combined salinity and heat stresses is a significant challenge, particularly in arid semi-arid regions. Gianco F1 cucumbers were grafted onto five cucurbit rootstocks and, together with an ungrafted control, grown Egypt net house saline soil during summer season over two years. The vegetative growth, yield, quality, biochemical, mineral composition traits measured. Although many differences observed among...

Bacterial wilt, caused by Ralstonia solanacearum, is highly diverse and the identification of new sources resistance for incorporation multiple complementary genes in same cultivar best strategy durable stable resistance. The objective this study was to screen seven accessions cultivated eggplant (Solanum melongena L.) 40 from 12 wild relatives two virulent R. solanacearum strains (Pss97 Pss2016; phylotype I, race 1, biovar 3). resistant or moderately were further evaluated with Pss97 a...

Abstract The tomato leaf miner ( Tuta absoluta ) is a serious pest of Solanum lycopersicum in the tropics and subtropics. Previous World Vegetable Center studies identified selected accessions S. galapagense , cheesmaniae pimpinellifolium that were resistant to whitefly Bemisia tabaci Genn.) spider mite Tetranychus urticae Koch). Here, we evaluated these for resistance T. based on number eggs from choice bioassays, larval mortality adults emerged percentages no‐choice feeding bioassays at...

Tomato late blight caused by Phytophthora infestans (Mont.) de Bary, also known as the Irish famine pathogen, is one of most destructive plant diseases. Wild relatives tomato possess useful resistance genes against this disease, and could therefore be used in breeding to improve cultivated varieties. In genome a wild relative tomato, Solanum habrochaites accession LA1777, we identified new quantitative trait locus for an aggressive Egyptian isolate P. infestans. Using double-digest...

Cucumber production is considered a crucial problem under biotic and abiotic stress, particularly in arid semi-arid zones. The current study investigated the impact of grafted cucumber plants on five cucurbit rootstocks infection with Fusarium oxysporum f. sp. cucumerinum alone combination heat stress two different locations (i.e., Kafr El-Sheikh Sidi Salem) during year 2021. rootstock VSS-61 F1 displayed highest level resistance values 20.8 16.6% for wilt incidence 79.2 83.4% reduction,...

Bacterial wilt caused by Ralstonia solanacerum is one of the most economically and destructive eggplant diseases in many tropical subtropical areas world. The objectives this study were to develop interspecific hybrids, as potential rootstocks, between (Solanum melongena) bacterial resistant line EG203 four wild accessions (S. incanum UPV1, S. insanum UPV2, S.anguivi UPV3, sisymbriifolium UPV4), evaluate hybrids along with parents for resistance strains Pss97 Pss2016. was crossed...

Late blight disease, caused by Phytophthora infestans (Mont.) de Bary, is one of the most challenging diseases threatening tomato production and other Solanaceae crops. Resistance to late found in certain wild species, but mechanism behind resistance not fully understood. The aim this study was examine metabolic profiles leaf tissue blight-resistant investigate if extracts from such genotypes could be used control production. We included three recognized accessions Solanum habrochaites...

Fusarium wilt is a serious disease of cucurbit crops including cultivated Luffa species (Luffa aegyptiaca, acutangula) causing considerable amount reduction in yield and quality. starting to be used as rootstocks for major commercial crops, but little known its resistance against soilborne diseases. Here, 63 accessions from the World Vegetable Center genebank were evaluated an aggressive isolate oxysporum f. FoCu-1 (Fsp-66). According visual screening based on severity rating, 14 exhibited...

The development of cultivars resistant to tomato fruit borer, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae), are very limited in Pakistan and other parts the world because lack good sources resistance for breeding. Insect-resistant would be beneficial decrease indiscriminate use pesticides on crops. Seven wild accessions, including Solanum galapagense Darwin & Peralta, pimpinellifolium L., cheesmaniae (Riley) Fosberg, a susceptible check (Solanum lycopersicum L.) (all Solanaceae),...

For facing acute problem of fresh water scarcity in the future to face increasing population and also for cultivating newly reclaimed lands.So, two field experiments were conducted open at farm Meat Salseil near Mansoura, City Dakahlia Governorate, Egypt during successive early summer seasons 2012 2013 on clay loam soil investigate effect treatments irrigation intervals (10 20 days) four foliar application from antitranspirants (control, Kaolin, Potassium silicate dyriton ) as well their...

The two-spotted spider mite, Tetranychus urticae , is a serious global pest of eggplants and other vegetables in the tropics subtropics. scarlet ( Solanum aethiopicum L.) gboma macrocarpon are two cultivated indigenous to sub-Saharan Africa. In this study, 120 accessions S. five from World Vegetable Center’s genebank collection were evaluated for mite resistance based on leaf damage scores trichome types densities. highest levels detected VI050393 VI050444. addition, VI042749 VI042753,...

Invasive tomato leaf miner, Phthorimaea absoluta causes serious damage and yield loss in production open-field protected cultivation. Use of chemical pesticides is uneconomical adversely affects humans the environment. Host-plant resistance an effective, economical eco-friendly alternative to pesticides. In this study, four wild accessions from World Vegetable Center along with one susceptible check were evaluated for their antixenosis antibiosis effects on P. absoluta. The VI037241 (Solanum...

Phytophthora infestans (Mont.) de Bary, a hemibiotrophic oomycete, has caused severe epidemics of late blight in tomato and potato crops around the world since Irish Potato Famine 1840s. Breeding resistant cultivars is one most effective strategies to overcome this disruptive disease. However, P. able break down host resistance acquire various fungicides, possibly because existence high genetic variability among isolates via sexual asexual reproduction. Therefore, manage disease, it...

Fusarium wilt of Luffa, caused by oxysporum f. sp. luffae, causes great losses in Luffa plants worldwide. In this study, 45 accessions germplasm were used to determine their resistance F. luffae isolates (FOLUST, FOLUSC, Fomh16, and Fol114) two independent trials. the first trial, only FOLUST was preliminarily identify resistant accessions. Nine acutangula five L. aegyptiaca isolate. second other three then reevaluate 14 The results indicated that FOLUSC but exhibited variable Fomh16 Fol114...

Downy mildew [Pseudoperonospora cubensis (Berk. & Curt.) Rostov] is a major destructive disease of cucumber (Cucumis sativus L.) worldwide. Resistant cultivars were recently introduced into Egypt, but yield losses high if no fungicides used. The objective this study was to identify sources resistance downy among Plant Introduction (PI) accessions from the U.S. National Germplasm System. We evaluated 133 such for under natural field epidemics during summer 2013 at El-Beheira Governorate,...

Grafting can be a useful technology to improve productivity of vegetable crops, including tomato, particularly under the serious challenges climate change for agricultural systems. This study aimed evaluate impact some local tomato interspecific hybrid rootstocks along with Maxifort on vegetative growth, productivity, and fruit quality field production conditions. Heat-tolerant 023 F 1 was used as scion over two late summer seasons 2021 2022. onto or KFS-16 resulted in maximum plant growth....

Cowpea [Vigna unguiculata (L.) Walp.] is a major legume crop and an important source of protein in Africa. The Kafr El-Sheikh University has long history cowpea breeding improvement Egypt. Two superior lines with high seed yield quality were selected through mutation released to farmers as new varieties under the names El Sheikh-1 Kaha-1. Crosses made between these two further improve meet farmers’ demand. Using pedigree selection method, 13 F10 evaluated over 2 years for related traits,...