The effect of diet and temperature on the life cycle of phytophagous insects
1999
Ivanovic, J. | Nenadovic, V. (Institut za bioloska istrazivanja "Sinisa Stankovic", Beograd (Yugoslavia). Odeljenje za fiziologiju i biohemiju insekata)
Among abiotic factors in addition to oxygen and water, temperature and diet play a significant role in survival, behaviour, development, metamorphosis, reproduction performance and population dynamics of phytophagous insects. In this article the role of the diet, especially with regard to quality and quantity of proteins and secondary metabolites on distribution of phytophagous insects, was discussed. Efficiency of metabolic food degradation directly affecting numerous characteristics of individual performances of insects is related to the action of the factors that influence these processes, e.g. amount and type of the allelochemicals, especially of tannins, inhibitors of peptide hydrolases (endo- and exopeptidases), pH of the guts, redox potential, buffer capacity, etc. Similar to the diet, temperature expresses its effects on the survival, abundance and distribution of phytophagous insects, the effects being dual - indirect and direct. Indirect action of temperature on a host plant accelerates its development and changes qualitative and quantitative composition of nutritious matters, as well as of allelochemicals. Temperature influences all levels of biological organization in insects.
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