Biodiversity of nematodes in “Tectona grandis” of Adilabad district forest

Abstract

Nematode population was studied in Tectona grandis (Teak) forest plants in Adilabad district. Plant parasitic nematodes were identified based on morphology and is often difficult as the characters, nematodes associated with Tectona grandis (Teak). Xiphinema, Hemicycliophora, Hoplolaimus, Paralongidorus, Longidorus, while Tectonia grandis, Emblica officinalis, Syzygium cuminii, and Careya arborea had most nematodes in the rhizosphere. Soil samples are collected from 3 locations in Adilabad forest district by symptoms caused by these nematodes are somewhat similar to nutrient deficiency symptoms, such as stunting and yellowing of plants and cause galling of roots. At the site of infection of Hoplolaimus species many lateral roots may emerge giving the root system a ‘bushy’ appearance. White females of cyst nematodes can be seen as small, white, pearl-like bodies on the roots. Environmental factors such as soil type, temperature, moisture and nutrient level play a major role in the expression of nematode-induced symptoms. Teak lumber comes from a tropical tree “ Tectona grandis ”, which grow in the Southeast part of Asia. However, one can find this kind of wood growing in many places around the world but Burma is the main exporter of Teak lumber. It was used especially in the manufacture of the outdoor furniture and boat decks construction. Uses of Tectona grandis is the source of a high quality general purpose hardwood known as teak. The timber is used for ship decking, flooring, furniture and construction. It is particularly recommended for construction in seaside environments (such as bridges and docks) because it is resistant to shipworm, a wood-boring sea mollusc ( Teredo spp., Teredinidae). Quinones in the sawdust inhibit the growth of several species of the fungi that cause wood rot. Plant parasitic nematodes are microscopic, identification of nematode species based of morphological is often difficult as the characters, below are the nematodes associated with Tectona grandis .