http://localhost:80/xmlui/handle/123456789/16885 Tue, 07 Apr 2026 09:33:22 GMT 2026-04-07T09:33:22Z http://localhost:80/xmlui/handle/123456789/17754 Title: WEEDS AS RESERVOIR OF NEMATODES Authors: S.A. ANWAR; A. ZIA; N. JAVED; Q. SHAKEEL Abstract: There is a hypothesis that damaging pests wide in host range continue their survival by repeated infection of host plants or alternative hosts. For example root-knot nematodes, Meloidogyne spp., are the most damaging nematode pests of field and vegetable crops because of their ability to feed on range of plants including field and vegetable crop, ornamentals, fruit trees, and weeds. In this manuscript the role of weeds as host for the plant parasitic nematode survival, development, reproduction, spread within a field, and increasing the potential for succeeding crops to be damaged by the nematode populations maintained on weeds has been discussed. This article has covered some of the important nematodes of crops and their weed hosts reported in Pakistan and other parts of the crop production regions of the world. It is believed that this article will provide important information not only to nematologists but also to the plant protection scientists to understand the role of weeds not only as pest but also as host of nematodes for designing the nematode management strategies. Mon, 27 Jul 2009 00:00:00 GMT http://localhost:80/xmlui/handle/123456789/17754 2009-07-27T00:00:00Z http://localhost:80/xmlui/handle/123456789/17753 Title: HISTOPATHOLOGY OF GRAPEVINE ROOTS INFECTED WITH ROOTKNOT NEMATODEMELOIDOGYNE INCOGNITA Authors: A. KHAN; F.M. BILQEES; N. KHATOON Abstract: Histopathology of grapevine (Vitis vinifera L.) roots naturally infected with Meloidogyne incognitarevealed that the larvae entered roots by puncturing action of the stylet and reached to the stellar region by intercellular penetration where cells were extensively damaged. The changes recorded were erosion of outer surface of root, compression and hyaline degeneration of cortical cells loosing their normal shape, abscess formation in the cortical region and enlargement of cells in the medullary region specially those of the superficial tissues. Sun, 26 Jul 2009 00:00:00 GMT http://localhost:80/xmlui/handle/123456789/17753 2009-07-26T00:00:00Z http://localhost:80/xmlui/handle/123456789/17752 Title: MANAGEMENT OF ROOT-KNOT NEMATODE INFECTING BRINJAL BY BIOPESTICIDES, CHEMICALS, ORGANIC AMENDMENTS AND BIOCONTROL AGENT Authors: M. SHAHID; A.U. REHMAN; S.H. KHAN; K. MAHMOOD; A.U. KHAN Abstract: The potential of bio-pesticides, chemical pesticides, organic amendments and bio-control agent was studied in controlling the root-knot nematode Meloidogyne incognita on brinjal “cv” Dilnasheen in two greenhouse experiments. In first experiment bio-pesticides (Abamectin and Azadirachtin) and a chemical pesticide Lorsban were tested alone and in combination with a bio-control agent Pasteuria penetrans for the management of root-knot disease. The best control (61 %) in root galling was recorded in pots treated with Azadirachtin + P. penetrans followed by Abamectin + P. penetrans (52 %), Abamectin and P. penetrans (48 %), Lorsban + P. penetrans (42 %), Azadirachtin (36 %) and Lorsban (21%) compared with unamended control. All the treatments showed significant reduction in egg-masses compared with untreated control; however, maximum decrease (66 %) in egg-masses was recorded in Azadirachtin + P. penetrans treatment while lowest reduction (45 %) was observed where Lorsban was applied. In another experiment bio-pesticides (Abamectin and Emamectin) and organic amendments (saw dust and kanair leaves) and a chemical (Furadan) were evaluated in controlling the root-knot disease. Abamectin proved to be the best in reducing root galling (62 %) and egg-masses (79 %) followed by Furadan while other treatments showed intermediary effects compared to untreated inoculated control Sat, 25 Jul 2009 00:00:00 GMT http://localhost:80/xmlui/handle/123456789/17752 2009-07-25T00:00:00Z http://localhost:80/xmlui/handle/123456789/17751 Title: DIVERSE ROLES / UTILITY OF NEMATODES IN NATURE- DO WE UNDERSTAND THEM ALL? Authors: R. AZMAT; Y. AKHTER Abstract: Presence of nematodes in various ecosystems and mediums such as soil, water, plants, humans, animals, fishes and other aquatic resources etc., is of great importance and concern. In every ecosystem, the nematodes like any other organisms must be playing a role. So far, nematodes associated with plants, insects and animals as harmful or useful organisms have been studied reasonably well and are known with their specific characteristics and host associations; whereas, some are referred to as “free living”. Up till now, the function of nematode parasites is well known as pathogens of plants and / or parasites of animal or fish but the role of the so-called “free living nematodes” is somewhat less defined and needs to be ascertained. Literature review shows that role and use of free living nematodes as a bio-indicator, bio-remediator or bio-transformer organisms is being expedited in recent past. A well known utility of some nematode species as a bio- remediator of marine life is already being established with the fish host where nematode are found reducing the site disturbance by concentrating more contaminants in their soft body tissues and hence providing help for survival of fish in polluted environment. Similarly free living nematodes may also serve to transform toxic compounds into nontoxic, either by concentrating or secreting or excreting or by their movement just like earthworms do in the soil. Some researchers in Pakistan are now studying chemical processes taking place in nematodes using advanced molecular techniques. Furthermore, studies on the effects of climatic changes on nematode behavior, survival strategies in harsh conditions and roles in bioremediation of polluted environments may open up new vistas on the beneficial role of these millions of years old creatures for the benefit of mankind. Thu, 23 Jul 2009 00:00:00 GMT http://localhost:80/xmlui/handle/123456789/17751 2009-07-23T00:00:00Z