Pakistan Research Repository

STUDIES ON PLANT PARASITIC NEMATODES OF ORNAMENTAL AND VEGETABLE PLANTS WITH SPECIAL REFERENCE TO ROOT-KNOT NEMATODE

Begum, Zarina (1996) STUDIES ON PLANT PARASITIC NEMATODES OF ORNAMENTAL AND VEGETABLE PLANTS WITH SPECIAL REFERENCE TO ROOT-KNOT NEMATODE. PhD thesis, University of Karachi, Karachi.

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Abstract

Out of 1500 soil and root samples collected from 47 vegetable and 89 ornamental plants from different parts of Pakistan, a total number 50 genera and 137 species of nematodes were isolated and identified from ornamental plants and 51 genera 119 species from vegetable plants. Of the nematodes, Amplimerlinius parbati Zarina & Maqbool, 1990, Dolichorhynchus motiaii n.sp.; Merlinius indicus Zarina & Maqbool, 1995; Pratylenchus roseus n.sp; Quinisulcius quaidi Zarina & Maqbool, 1992; Tylenchorhynchus rosei Zarina & Maqbool, 1991; Tylenchorhynchus tuberosus Zarina & Maqbool 1994; Tylenchus naranensis Maqbool, Zarina & Ghazala, 1987 have been described as new species. Besides, 12 known species viz., Bitylenchus vulgaris (Upadhyay, Swarup & Sethi, 1972) Siddiqi, 1986; Dolichorhynchus phaseoli (Sethi & Swarup 1968), Mulk & Jairajpuri, 1974; Eutylenchus excretorius Ebsary & Eveleigh 1981; Hoplolaimus dubius Chaturvedi & Khera, 1979; Merlinius adakensis Bernrd, 1984; Pratylenchus agilis Thorne & Malik, 1968; P. flakkensis Seinhorst, 1968; P. flakkensis Seinhorst, 1968; P. sudanensis Loof & Yassin, 1971; Scutellonema brachyurus (Steiner, 1938) Andrassy, 1958; Tylenchorhynchus intervallatus (Tobar Jimenez, 1970) Fortuner & Luc, 1987; T. madrasensis Gupta & Uma, 1981 and Tenunemellus leptocephalus (Raski, Koshy & Sosamma, 1982) Siddiqi, 1986 have been reported and redescribed from Pakistan A total of 44 new host plants and their associated plant parasitic nematodes comprising of 37 genera and two new genera Eutylenchus and Tenunemella have been recorded from Pakistan. Among these, Meloidogyne root-knot nematode have been detected in high frequency associated with ornamental and vegetable plants. M. incognita has been recorded on Jatropha podagrica, Polianthes tuberose; M. Javanica on Lobularia maritime, Justicia adhatoda, Calendula officinalis Cossmos bipinnatus, Hibiscus rosa-sinensis, Jasminum officinale, Petunia inflate, Catharanthus roseus, Setaria verticillata and Solanum nigrum. Besides, Acalypha wilkesiana, Bougainvillea spectabilis, Citharexylum spinosum, Dracaena sp., Gerbera lanuginose, Launaea nudicaulis, Manihot esculenta, Rosa indica, Tecoma stans, Zinnia elegans and Cucumis melo ssp. Melo have been found as hosts of M. incognita and M. Javanica. Lobularia maritime is a new host record for M. javanica and onion as a host of Heterodera mothi Population dynamics of different plant parasitic nematodes associated with Acalypha wilkesiana, Dracaena sp., Jatropha podagrica and Rosa indica showed maximum population during the months January to April with rapid decline during summer months. Tylenchorhynchus annulatus was the only nematode isolated from test plants with high frequencies of Helicotylenchus dihystera, H. erythrine, Xiphinema basiri, Rotylenchulus reniformis, X. americanum, Hoplolaimus indicus and 2nd stage juveniles of Meloidogyne incognita and M. javanica Different organic amendments such as datura leaf powder, neem cake, mustard cake, leaf extracts of calotropis, datura, neem leaf extracts, different nematicides viz., aldicarb, furadan and mocap, some biocontrol agents such as paecilomyces lilacinus, Verticillium chlamydosporium (VC-10) and V. chlamydosporium (VC-P) and Verticillium sp., used alone or in combination showed effective control of M. javanica root-knot nematode with improved plant growth. Significant results were obtained where furadan was used with P. lilacinus @ 1.0% w/w in zinnia and cockscomb. On alyssum, cineraria and petunia, aldicarb was found to be most effective. Use of organic amendments significantly improved plant growth as compared to chemical nematicides and biocontrol agents. Mixed cropping of calendula with periwinkle and petunia with marigold significantly suppressed M. javanica root-knot disease and subsequently increased plant growth

Item Type:Thesis (PhD)
Uncontrolled Keywords:parasitic nematodes, root-knot nematode, vegetable plants, amplimerlinius parbati zarina & maqbool, dolichorhynchus motiaii n.sp.; merlinius indicus zarina & maqbool, pratylenchus roseus n.sp; quinisulcius quaidi zarina & maqbool, tylenchorhynchus rosei zarina & maqbool, tylenchorhynchus tuberosus zarina & maqbool tylenchus naranensis maqbool, zarina & ghazala, bitylenchus vulgaris (upadhyay, swarup & sethi, 1972) siddiqi, dolichorhynchus phaseoli (sethi & swarup 1968), mulk & jairajpuri, eutylenchus excretorius ebsary & eveleigh hoplolaimus dubius chaturvedi & khera, merlinius adakensis bernrd, pratylenchus agilis thorne & malik, p. flakkensis seinhorst, p. flakkensis seinhorst, p. sudanensis loof & yassin, scutellonema brachyurus (steiner, 1938) andrassy, tylenchorhynchus intervallatus (tobar jimenez, 1970) fortuner & luc, t. madrasensis gupta & uma, tenunemellus leptocephalus (raski, koshy & sosamma, 1982) siddiqi
Subjects:Biological & Medical Sciences (c) > Biological Sciences(c1) > Paleo-botany(c1.9)
ID Code:1397
Deposited By:Mr. Muhammad Asif
Deposited On:19 Feb 2007
Last Modified:04 Oct 2007 21:06

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