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Raspberry Beelte


Raspberry Beelte

Usually appear in

Spring to Summer

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Caused By:-     The Beetle Byturus tomentosus


The raspberry beetle Byturus tomentosus and it's larve, is one of the most destructive and annoying pest of raspberries, blackberries and loganberries, especially as they are not found until the ripe raspberries are picked and are being prepared for eating.
The adult beetles feed on the flowers, where they lay their eggs. The larvae then eat into the young fruit where they feed until either picked or the fruit drops. The larvae then lives and overwinters in the ground emerging as adult beetles when the berries are flowering.
Damaged ripe berries have greyish-brown dried up patches at the stalk end. The whitish/cream larvae can be found inside the fruits and can be up to 8mm long. Often affected berries will go mouldy especially if the weather conditions are humid or wet.
Picture from the 1st (1876–1899), 2nd (1904–1926) or 3rd (1923–1937) edition of Nordisk familjebok.


The early fruiting berries are most likely to be affected, therefore growing late varieties will reduce the incidence of this pest.
Spraying, in the evening, when most of the flowers have fallen. Will give good protection. There are also organic sprays that can be used.
Remove infested fruits immediately will reduce the likelihood of infestation the following year.
Forking over the soil will let birds get to the grubs in the soil.

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