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Get expert help from the RHS to deal with pests and other problems
Keep a watchful eye for signs of vine weevil beetles nibbling the edges of leaves and their grubs who will be munching on roots below the surface.
Heavy attacks of narcissus bulb fly larvae can kill daffodil bulbs and some other plants in the Amaryllidaceae. This can lead to a severely reduced spring display.
The phenomenon known as oak decline has been known in the UK for nearly one hundred years. However, in the last few years there has been an alarming increase in the number of trees affected by acute oak decline – a fast-acting problem thought to be caused by bacteria.
Odd-shaped growths on the foliage, flowers, acorns and stems of oak trees are often caused by gall wasps.
Oak processionary moth is a non-native moth that has become established in parts of London and its surrounds. Whilst it can defoliate oak trees the primary concern is the caterpillars hairs, these can cause irritation if in contact with human skin. These caterpillars should not be handled nor approached .
The grazing activities of the slug-like larvae of the oak slugworm sawfly can cause leaves on oak and lime trees to turn brown and dry up.
The maggots of onion fly can damage the roots and bulbs of onions and some related plants, sometimes killing seedlings.
Small sap sucking diaspid scale insects can encrust the leaves and stems of glasshouse orchids and some other glasshouse plants.
Adult pea and bean weevils can cause distinctive notch-like damage to the leaf margins of young pea and broad bean plants in spring. This can be alarming but in most cases does not affect the growth of the crop.
Pea moth caterpillars feed inside pea pods but the, often severe, damage is often only spotted at harvest. Consequently, the pods need to be shelled with care to avoid contamination.
The grazing activities slug-like larvae of the pear and cherry slugworm sawfly can cause leaves on pears, cherries, hawthorn, plum, Cotoneaster, Chaenomeles and Sorbus to dry up and turn brown.
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