By Elizabeth A. Bernays, Reginald F. Chapman
This can be the 1st ebook that specializes in the habit of host-plant choice by way of plant-feeding bugs. It describes the styles of host use, the chemical gains of vegetation that ensure host choice, the body structure of insect sensory platforms, and the insect behaviors, with an emphasis on mechanisms. The booklet additionally discusses genetic variability and the results of expertise, and it concludes with a overview of the evolution of host plant levels. this can be a one of a kind e-book for everybody drawn to plant-feeding bugs, and a huge reference for undergraduates, graduate scholars, learn scientists and agriculturists.
Read or Download Host-Plant Selection by Phytophagous Insects (Contemporary Topics in Entomology) PDF
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Additional info for Host-Plant Selection by Phytophagous Insects (Contemporary Topics in Entomology)
Sample text
Herbaceous plants have generally high levels of mineral nutrients (about 10% dry weight) compared with woody plants. Potassium is at much higher levels than sodium in most plants and is particularly high in some families, for example, the Boraginaceae. Some members of the Chenopodiaceae accumulate sodium. , NaC1 may represent more than 10% of the dry weight. Soil type affects mineral composition of plants considerably. For example plants on serpentine soils tend to be high in magnesium. 4 Internal components: secondary metabolites The nutrient compounds in plants, and all the additional substances considered "essential for plant growth and development" are together sometimes referred 26 / Chemicals in Plants to as primary metabolites.
In seedling sorghum, shorter chain lengths of alkanes and esters predominate, while in older plants, longer chain lengths are more abundant. In addition, the seedlings have very high levels of p-hydroxybenzaldehyde. In many plant species there are genetic differences in the quantity or constituents of the wax. For example on pea leaves over 50% of the wax is the alkane hentriacontane, but four mutants are known with consistently less of the alkane and more of the alcohols. 3). However, the precise wax composition is the product of the interaction between the environment and the genetic makeup of the plant.
Ascorbic acid is universally present in plants and essential for most herbivorous insects. It is found at high concentrations in young tissue. Commonly occurring organic acids also include longer chain acids, such as linoleic and linolenic acids (see Fig. 28) which are nutrients for insects, although many of the carboxylic acids are also utilizable by insects. 2. Minor nutrients, including inorganic salts, vary greatly in plants according to taxon and soil contents. Herbaceous plants have generally high levels of mineral nutrients (about 10% dry weight) compared with woody plants.