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However, white grubs (reaching 40–45 mm long when full grown) live in the soil and feed on plant roots, especially those of grasses and cereals, and are occasional pests in pastures, nurseries, gardens, and golf courses. An obvious indication of infestation is the presence of birds, such as crows, peeling back the grass to get to the grubs.
Serious infestations can cause plant death. Rose scale (order Hemiptera: family Coccoidea) Aulacaspis rosae – Mainly found on the stems and branches of the plant, lack of control will allow the pest to spread to flower stalks and petioles. At this point the plant would be stunted, spindly and with a white, flaky crust of scales on the bark.
Some grubs pack a triple whammy. They infest plant roots. Predators shred the lawn for grubs. And those that become Japanese beetles ravage plants.
The larvae can cause severe damage and kill the plant by gnawing the plant roots. [5] The cockchafer develops via metamorphosis, in which the beetle undergoes stages of egg, larvae, pupae and adults. The mating behaviour is controlled by pheromones. The males usually swarm during the mating season while the females stay put and feed on leaves. [6]
Chalcoscelis albiguttata-pest of leaves [1] leaf eating, gelatine grub (Chalcocelis albiguttatus) [3] scale insect (Coccoidea) [1] scale insect, soft scale (Coccus sp.) [3] durian fruit borer, durian husk borer, yellow peach moth, Queensland bollworm (Conogethes punctiferalis syn. Monogatus puntiferalis and Dichocrocis punctiferalis) [1] [3]
The coconut rhinoceros beetle attacks a palm at the base of the fronds (leaves) where they are attached to the growing trunk. They start at one of the middle leaf axils, boring through the base of other fronds into the centre of the crown, the palm heart, where the young, still white fronds develop. The beetle feeds on the undeveloped fronds ...