17 research outputs found
Anthocorid predators learn to associate herbivore-induced plant volatiles with presence or absence of prey
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A CHEMICAL BASIS FOR PLANT RESISTANCE TO GRASS GRUB AND BLACK BEETLE LARVAE (COLEOPTERA : SCARABAEIDAE)
Full text linkCrude extracts of root of the resistant pasture plants lucerne (Medicago sativa) and Lotus pedunculatus contain strong feeding deterrents for third instar Costelytra zealandica and Heteronychus arutor larvae. Purified saponins isolated from active crude lucerne root extract markedly reduce grass grub feeding and have an ED of 0.019%. Black beetle larvae are even more sensitive to the material. Separate and chemically distinct feeding deterrent fractions, active against the two insects, have been isolated from Lotus pedunculatus root. The role of feeding deterrents in mediating the non-preference of these insect pests for lucerne and Lotus is discussed.</jats:p
The influence of amino acids and inorganic salts on feeding by larvae of<i>Heteronychus arator</i>(Coleoptera: Scarabaeidae)
Full text linkEffect of root extracts of resistant pasture plants on the feeding and survival of black beetle larvae,<i>Heteronychus arator</i>(Scarabaeidae)
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Effect of lucerne saponins and Lotus condensed tannins on survival of grass grub,<i>Costelytra zealandica</i>
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