http://localhost:80/xmlui/handle/123456789/16910 Tue, 07 Apr 2026 11:15:33 GMT 2026-04-07T11:15:33Z http://localhost:80/xmlui/handle/123456789/17808 Title: In vitro mortality of root-knot nematode Meloidogyne incognita from lac based chemicals Authors: D.S.Srivastava; S.Mukesh; V.Savita; B.K.Dwivedi; S.P Singh; S.Srivastava; R.N.Majee Abstract: In vitro two lac based chemicals viz., 9-hydroxy A —nonenoic acid (synthesized from aleuritic acid, a major component of lac) and its methyl ester was evaluated against juveniles (h) of Meloidogvne incognita. Nematicidal activity of 9-hydroxy A —nonenoic acid (HNA) and its methyl ester (MENA) was dependent on dose and exposure time. The mortality rate was increased as concentration increases from 62.5 to 1000 ppm. Maximum mortality was recorded after 72 h of methyl ester in comparison to 9-hydroxy A —nonenoic acid over the control due to increase in lipophilic character of methyl ester whlch might have dissolved the lipid layer of nematode cuticle causmg death. Sun, 20 Jan 2013 00:00:00 GMT http://localhost:80/xmlui/handle/123456789/17808 2013-01-20T00:00:00Z http://localhost:80/xmlui/handle/123456789/17805 Title: Genotypic response of different potato cultivars against Meloidogyne incognita Authors: A.Hayat; N.Javed; S.A.Khan; A.S.Gondal; M.Kamran; M.S.Aasi Abstract: The use of resistant genotypes is an attractive altemative for managing yield losses caused by plant parasitic nematodes. Experiments were designed to identify resistant potato gennplasm against root-knot nematode, Meloidogvne incognita. at Faisalabad, Pakistan. Ten potato cultlvars, replicated five times in RCBD layout, were sown in a sick plot infested with M. incognita. Root-knot nematode reproduction and host damage were assessed by recording root galls, egg-mass indices, root weight, shoot weight, number of leaves, fruit weight, rate of reproduction and final population of nematodes. The data revealed considerable vanatlon in response against M. incognita among the genotypes tested but none of the cultivars was immune. The cultivar FD-8-1 was hlghly susceptible. Other nine cultlvars had lesser galling index, with low fecundity =indicating their ability to restrain the adult female reproduction. The cultivar FD-61-3 scored least number of root galls and egg-mass indices. Sun, 20 Jan 2013 00:00:00 GMT http://localhost:80/xmlui/handle/123456789/17805 2013-01-20T00:00:00Z http://localhost:80/xmlui/handle/123456789/17802 Title: Biocontrol of root-knot nematode by arbuscular mycorrhizal fungi in Luffa cylindrica Authors: N.Hajira; F.Shahina; K.Firoza Abstract: Experiment was conducted to evaluate the efficacy of arbuscular myconhizal (AM) fungi (Glomus spp. and Gigaspora spp.) as bioprotectant agamst root-knot nematode Meloidogvne incognita in sponge gourd (Luffa cylindrica (L.) Roem.), myconhizal plant of family Cucurbitaceae. All parameters were estimated in roots, shoot and leaves of myconhizal and non myconhizal plants. Physical/biochemical and carbon profile were taken into account. Comparatlve study clearly indicates the sigmficant variations in all parameters. Leaf area and plant height were Increased in myconhizal plants than non-myconhizal, while it showed a shall) decrease in nematode Infected plants, same plants also showed less water content due to xylem vessels damage. However, in myconhizal plants, roots had large amount of carbohydrates indicating transfer of photosynthates to fungal partner. Nematode infected roots have least amount of carbohydrates showing a great sink of carbon to rhizosphere. Sun, 20 Jan 2013 00:00:00 GMT http://localhost:80/xmlui/handle/123456789/17802 2013-01-20T00:00:00Z http://localhost:80/xmlui/handle/123456789/17801 Title: Seasonal dynamics of phytonematodes associated with olive cv. Toffahi affected by soil temperature and moisture Authors: A.M.S.Lashein; M.M.A. Youseef Abstract: Seasonal dymamics of the renifonn nematode, Rotylenchulus renifonms in soil and roots and the spiral nematode, Helicotylenchus sp. in soil of olive (Olea europaea L.) cv. Toffahi over one year were analyzed. Population densities of both nematodes reached higher populations in spring with the onset root growth through summer and Minter and significantly (p<0.05) declined m autumn revealing that these nematodes were negatively conelated Mith the prevailing soil temperature CC) and were positively conelated WIth percentage soil moisture at different sampling months and seasons. Conelation coefficients (r) were calculated to ascertain these relationships Sun, 20 Jan 2013 00:00:00 GMT http://localhost:80/xmlui/handle/123456789/17801 2013-01-20T00:00:00Z