have a very long lifecycle, lasting between one and three years. This cycle starts with the deposition of eggs in the ground, close to plant roots.…
Because Otiorhynchus sulcatus is parthenogenetic a single female is enough to start a new population. About Black vine weevil Damage symptoms The…
June in groups in the soil. They hatch about one month later and the larvae start to feed on roots. The larvae (‘wireworms’) are long, thin,…
the larvae drop to the ground to pupate. The adult stage overwinters and starts a new cycle next spring. Damage symptoms Both adults and larvae feed…
are shiny and white. The eggs hatch after about four weeks and the larvae start to feed on roots. The larvae are white-coloured, C-shaped grubs, with…
aphids mainly feed on the underside of leaves of their summer hosts and start to reproduce parthenogenetically. Both wingless and winged forms are…
host plant reaction. Infested plants become severely stunted when growth starts in spring. Petioles are shortened and leaves curled and twisted.…
. Larvae overwinter in the soil, usually in the third instar stage. and start feeding again in spring. They become active again and feed voraciously…
damage is caused through the transmission of plant viruses. Infestations start usually at the younger parts of the plant but can spread all over the…
damage on roots. Especially the root tips are affected. They become black and start to rot internally. Just above the damaged area, the roots produce…
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