The biodisposal of organic waste by larvae of the black soldier fly Hermetia illucens and the possibility of using the formed zoocompost against phytonematodes

Larvae of the black soldier fly Hermetia illucens effectively use fruit and vegetable mixtures - waste of retail chains as a feed substrate, including those infected with nematodes. It is shown that the larvae are capable to dispose of the potatoes with high speed (for the 12 day it is reached 70% conversion of substrate) and completely eliminate in the affected root as the potato plant pathogenic nematode Ditylenchus destructor and saprobiotic nematode Rhabditis spp., which impair the commercial properties of potatoes and other root crops during storage. In the control substrate without larvae of the black soldier fly phytopathogenic nematodes were preserved during the study period, and saprobiotic nematodes have been multiplied. Introduction of zoocompost obtained from fruit and vegetable waste (excrements of the larvae with the remains of undigested substrate) to the soil reduces the infectivity of tomato root-knot nematode Meloidogyne incognita. The introduction of compost under the root system immediately before the infection of the 2-month tomato seedlings reduced the negative impact of the nematode, the plants were more powerful than the infected control. Plants treated with zoocompost at a dose of 6.5 g/plant were particularly distinguished: the mass of their above-ground part and the height of the stem was close to uninfected control. The prospects of using zoocompost to stimulate the growth and development of plants, and especially plants suffering from nematode invasion, have been shown.