THE EFFECT OF ZOOCOMPOST FORMED AS A RESULT OF THE DEVELOPMENT OF LARVAE OF THE BLACK SOLDIER FLY HERMETIA ILLUCENS IN ORGANIC SUBSTRATES ON NEMATODES OF VARIOUS TAXONOMIC AFFILIATIONS

Abstract

Bioconversion of organic material with the help of Hermetia illucens larvae allows to partially solve the problem of waste disposal and to obtain a wide range of various products, including zoocompost. In laboratory conditions, a mixture of lawn grasses was grown in the soil from a natural biocenosis with a predominance of saprobiotic (Rhabditida), polyphage species of nematodes (Dorylaimida) and phytohelminths (Tylenchida) and with the introduction of zoocompost in the soil in a ratio of 1/43. After 30 days, the number of nematodes in the control variants increased almost 6 times, the number of phytohelminths practically remained at the same level, the increase was due to saprobiotic nematodes. The ratio of phytohelminths to saprobiotic nematodes was 1:18. When zoological compost was introduced, a significant increase in saprobionts and a decrease in nematodes of the tylenchid order (~ 1:1380) were observed. The number of polyphagous species at the end of the experiment doubled in the control, while in the experiment it changed slightly. It was shown that in addition to the growth-promoting effect on plants, the introduction of an organic substrate leads to an increase in the number of saprozoid nematodes, with the displacement of phytohelminths.