Nematodes Against Harmful Insects
Biological method - Nematodes (Round Worms) Against Harmful Insects
Tech Area / Field
- AGR-PPR/Plant Protection/Agriculture
8 Project completed
Senior Project Manager
Weaver L M
Georgian Academy of Sciences / Institute of Zoology, Georgia, Tbilisi
- Ohio State University / Ohio Agricultural Research and Development Center; Department of Entomology, USA, Wooster, Ohio\nUniversity of Florida / Entomology and Nematology Department / The Florida Nematode Evolution Laboratory, USA, FL, Gainesville
Project summaryThe main objectives of the suggested project imply: reveal local entomopathogenic nematode species or strains, develop new methods of their cultivation, experimental study of nematode survival in various conditions, work up methods of application of entomopathogenic nematodes against the major pests of cultivated crops or forest species. The above mentioned is one of the parts of the biological method developed against the pests of agricultural crops.
Such insects as phytophageos are considered to be of great importance in natural and cultural ecosystems. They greatly damage crops, the result of which is the poor harvest and serious plant diseases. Any living organisms, including insects, have enemies - predators and pathogenic microorganisms, responsible for various diseases.
It has been stated that roundworms (nematodes) parasitize within any existing animal or plant. Insect affecting nematodes cause physiological changes within their hosts ceasing their reproduction, weakening the insects by losing their body fat and causing death by pathogenic bacteria carried by the nematodes.
Pathogenic nematodes affect only part of insects in nature. But as a result of established relations and co-adaptation within the host-parasite system, the host as a rule dies. The same nematode while penetrating into the insect which is not adapted to this parasite, carries pathogenic bacteria into the body of the host, causing the development of septicaemia and its death.
Massive introduction into harmful insects requires a plenty of nematodes in the aqueous suspension which makes it possible to spray those plants on which the pests feed.
Massive nematode reproduction can be carried out via their cultivation in specially processed and generally accepted feeding media. We suggest more effective and economic media for nematode cultivation. We also have been developing new methods of transporting the start of the invasion to those places where nematodes can be used against the crop pests. This method would greatly simplify the spraying procedure and would make the utilization of the preparation more available for both specialists and non-specialists in field conditions.
Thus the presented project suggests:
1. Revealing new entomopathogenic nematode strains
2. New techniques and new media for insect cultivation as well as nematode strains revealed anew.
3. Transporting the start of invasion and preparing the nematode suspension for field conditions.
The project will be realized at Georgian Academy of Sciences, Institute of Zoology, at the Laboratory of Entomonematodology.
The project should be referred to the category of applied sciences.
Final results of the carried out research work can be the following:
1. Reveal new entomopathogenic nematode strains.
2. Work up economic methods of nematode cultivation in various media and the methods of their preservation.
3. Develop convenient methods of transportation of the invasion start and its utilization in field conditions.
4. Evaluate the preparation effect on more harmful insects under conditions appropriate to Georgia.
5. Introduce the preparation as the ecologically pure agent against major pests.
The utilization of entomopathogenic nematodes against insects eliminates environmental pollution with chemicals, which are used to protect plants against the pests. The suggested preparation is harmless not only for plants but for man as well. At the same time the suggested preparation does not have any effect on insect predators, as they do not feed on sprayed plant tissues. Insect predators appear on sprayed plants only when attacking phytophages.
Collaborators agree to:
· Carry out joint scientific research work provided by the project.
· Exchange information during the process of the project accomplishment.
· Consider account materials.
· Carry out consultations (if necessary).
· Discuss the results and the obtained data at conferences.
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