Several cover crops with potential for use in tropical and subtropical regions were assessed for susceptibility to three common species of root-knot nematode, Meloidogyne arenaria, M. incognita, and M. javanica. Crops were selected based on potential use as organic amendments in anaerobic soil disinfestation (ASD) applications. Nematode juvenile (J2) numbers in soil and roots, egg production, a...

culture filtrates (cf) of two species of the nematophagous fungi, arthrobotrys oligospora and arthrobotrys conoidesat three concentrations (25%, 50% and 100%) of stock, were tested on the mortality of second stage juveniles (j2) and egg hatching rate of meloidogyne incognita and meloidogyne javanica. results showed that the percent juvenile mortality was directly proportional to concentration o...

The root-knot nematodes (RKN), Meloidogyne spp., represent an important threat to yam (Dioscorea spp.) production in West Africa. With the aim to establish the diversity of RKN species affecting yam tubers, for control and resistance screening purposes, surveys were conducted in the main yam producing areas of Nigeria. Galled tubers (N = 48) were collected from farmers' stores and markets in ni...

Root-knot nematodes (Meloidogyne spp.) represent one of the most polyphagous genera of plant-parasitic nematodes. To date, close to 100 valid species are recognized. In contrast to the size of the genus, the majority of past research focused on a small number of species, i.e., the so-called 'major' species M. arenaria, M. hapla, M. incognita, and M. javanica. This review highlights recent work ...

Resistance of pepper species (Capsicum annuum, C. baccatum, C. chinense, C. chacoense, and C. frutescens), cultivars and accessions to the root-knot nematodes Meloidogyne incognita race 2 and M. javanica, and their graft compatibility with commercial pepper varieties as rootstocks were evaluated in growth chamber and greenhouse experiments. Most of the plants tested were highly resistant to M. ...

Isolates of Pasteuria penetrans were evaluated for ecological characteristics that are important in determining their potential as biological control agents. Isolate P-20 survived without loss of its ability to attach to its host nematode in dry, moist, and wet soil and in soil wetted and dried repeatedly for 6 weeks. Some spores moved 6.4 cm (the maximum distance tested) downward in soil withi...

Bu çalışmanın amacı, Kuzey Irak’ın Süleymaniye, Erbil ve Duhok illerindeki sera sebzelerinde kök-ur nematodlarının (Meloidogyne spp.) dağılımının yaygınlığının belirlenmesidir. Yüz seksen yedi serada 2018 yılı Kasım Aralık aylarında sürvey yapılmıştır. Meloidogyne spp., perineal patternler esteraz fenotipi kullanılarak teşhis edilmiştir. Sürvey yapılan seraların %37’sinde varlığı tespit edilmiş...

Microplot and field experiments were conducted to determine relationships of population densities of Meloidogyne spp. to performance of flue-cured tobacco. A 3-yr microplot study of these interactions involved varying initial nematode numbers (P(i)).and use of ethoprop to re-establish ranges of nematode densities. Field experiments included various nematicides at different locations. Regression...

1. Bird, A. F. 1969. The influence of tobacco ringspot virus and tobacco mosaic virus on the growth of Meloidogyne javanica. Nematologica 15:201-209. 2. Goswami, B. K., S. Singh, and V. S. Verma. 1974. Interaction of a mosaic virus with root-knot nematode Meloidogyne incognita in Vigna sinensis. Nematologica 20:366-367. 3. Ryder, H. W., and H. W. Crit tenden. 1962. Interrelationships of tobacco...

Carnation is one of the most crucial cut flowers in Turkey. Root-knot nematodes (RKNs) cause significant damage on carnation production and quality. Therefore, determination response varieties to RKNs required for management practices. In this study, four cultivars, Turbo, Betsy, Nirvana Glaciar, were inoculated with second stage juveniles (J2s) Meloidogyne incognita, M. javanica arenaria under...