Weed Hosts of Root-Knot Nematodes in Tomato Fields Root-knot nematodes ( Meloidogyne spp.) are one the three most economically damaging genera plant parasitic on horticultural and field crops. distributed worldwide, obligate parasites roots thousands species. All major crops, vegetable turf, ornamentals, legumes weeds susceptible to or more root-knot In this study, nineteen weed species were found be hosts for incognita, M. javanica, arenaria race 2, hapla tomato fields Khorasan Province,...

Root-knot nematode (Meloidogyne javanica) management should be partly based on the knowledge of threshold density, and this value is likely to vary depending resistance level tomato cultivars. The damage functions four initial population densities (Pi) (0, 1,000, 3,000 5,000 egg kg-1 soil) root-knot were determined in experiment was performed completely randomized design with replications. results showed that yield responses Pi fitted properly by a log-logistic function three parameters....

The role of some Iranian strains Pseudomonas spp. as biocontrol agents against Meloidogyne incognita and their ability to colonise pistachio roots was investigated. results in vitro experiments indicated that all tested bacteria produced significant suppression M. showed were able kill juveniles with strain VUPf428 achieving about 99% mortality at 72 h. vivo treatments the best could build high populations soil infested nematodes VUPf5, VUPf52 VUPf205. These isolates also caused highest...

Abstract The distribution of nematodes was studied in rice fields Guilan province, Iran, from 2014 to 2016. Nematode biodiversity 250 soil and root samples examined. Thirty nematode species were identified morphologically, including plant parasites, microbivores mycetophagous predator species. Molecular techniques also used for further identification three parasitic Indicators population estimated. Spiral (Helicotylenchus crenacauda Sher, 1966 H. digitiformis Ivanova, 1967) stunt...

The citrus nematode (Tylenchulus semipentrans) is one of the most important parasitic nematodes affecting trees, causing gradual decline and reduced yield. Potential risks, high costs environmental consequences chemical compounds have led researchers to explore non-chemical methods such as using plant-based products for management. present study was conducted control essential oil water extract Artemisia annua methanolic Melia azederach under laboratory greenhouse conditions. In vitro...

Summary The effects of salicylic acid (SA), Trichoderma viride and Pseudomonas fluorescens CHA0 were studied on the root-knot nematode Meloidogyne incognita race 2 in resistant susceptible tomato cultivars (Gina VF, Falat CH, 111, Karoon) during 2012-2013. Four-leaf seedlings used, grown pots containing 1000 g sterilized soil; each seedling receiving 20 ml T. suspension 1×10 6 spores, 30 P. with 10 9 cfu/ml, 5mM 2000 second stage juveniles. Parameters relevant to population plant growth...

Abstract Background Root-knot nematodes (RKNs) cause severe losses in kiwifruit-growing regions. The endophytic bacteria could be biological agents for management. aim of this study was the isolation and identification from kiwifruit orchards evaluation their antagonistic ability against RKN greenhouse conditions. Results In study, population nematode bacterial strains were isolated roots leaves Mazandaran Guilan provinces Iran. Molecular experiments conducted to identify confirm isolates...

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Abstract During a nematode survey in Iran, an abundant population of sheathoid, migratory, root-ectoparasitic nematodes was recovered from tea, Camellia sinensis (L.), Kuntze plantation for the first time. Morphological and molecular characterization identified Iranian as Hemicriconemoides kanayaensis . The morphometrics H. agreed with original description. Phylogenetic relationships within —based on ITS region, D2 to D3 expansion regions 28S rRNA, partial 18S rRNA genes along mitochondrial...

The effect of Steinernema carpocapsae (IRA18) infection was studied on the mortality, immunity and antioxidant responses Glyphodes pyloalis Walker larvae. LC50 value 582.9 infective juvenile per mL with confidence limit 359.1-811.5 obtained via bioassay against Injection S. increased number total hemocytes after 1-6 h compared to intact Ringer-injected larvae while highest numbers plasmatocyte granulocytes were recorded 1 3 h. Although had a steady activity phenoloxidase at different time...

In order to identify of peanut fields plants parasitic nematodes, 130 samples soil around the roots were collected in province Guilan, during summer and fall 2011. After extraction, killing, fixation transferring anhydrous glycerol, nematodes mounted on permanent microscopic slides species identified by using light microscope, equipped with digital camera, based morphological morphometric characters valid keys. this study 20 belonging 17 genera identified, that are as followes: 1-...

Abstract Root-knot nematodes (RKN) cause considerable economic losses to kiwifruit production annually. Screening of resistant cultivars has been one the long-standing methods manage root-knot nematodes. Here, reaction four most common commercial kiwifruit, namely, Actinidia chinensis var. deliciosa cv. Hayward, A. Abbott, Bruno, and Haegeum (commonly known as ‘Golden’ kiwifruit) infection by RKN, Meloidogyne incognita , was evaluated. Among examined susceptible, having on average 52.8...

Tylenchulus semipenetrans Cobb, 1913 is among some of the most economically important plant-parasitic nematodes in world. The nematode has been identified as causal agent slow decline. Most studies estimate yield losses, due to T. semipenetrans, range from 10% 30%, depending on level infection, aggressiveness population, soil characteristics, susceptibility rootstock, presence other pathogens and grove management practices. In order identify citrus northern Iran, root samples were collected...