Biochemical Composition of Root Mass of Healthy and Damaged by the Larva of Plagionotus floralisPall. (Coleoptera%253A Cerambycidae) Alfalfa (Medicagosativa L.) Plants
2019
Evgeniya Zhekova
Alfalfa (Medicago sativa L.) is a preferred host for a large number of arthropods. The large diversity of harmful entomofauna is a serious difficulty in its cultivation. The aim of the study is to investigate the impact of damages caused by the larvae of alfalfa longhorn beetle (Plagionotus floralis Pall.) on the biochemical composition of the roots of alfalfa plants of different variety and age. Standard methods were used to carry out the field experiments in order to define the damages and the laboratory biochemical analyzes. It was found that significant changes in the composition of important organic compounds and chemical elements occurred in the root mass of the damaged plants during the years. In the roots of the damaged plants, the composition of water-soluble sugars and saponins decreased the amount of raw protein, raw fibers, phenols and calcium increased, whereas difference was not found in dry matter, phosphorus and magnesium content, compared to healthy plants.
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