Organic Aphids In Cane Fruit

Avoid establishing plantations near woods or hedges. Woody hosts such as wild hawthorn and pear are particularly attractive to flying adults, which seek out bright white flowers. Keep cane numbers under control and prune out excessive growth to keep the canopy open, as beetles are especially prevalent in shady conditions. Biennial cropping can help to avoid the pest, but only if fruiting and vegetative plantations are well separated.

Chemical Control

Sprays of pyrethrum may be used as a last resort, but effectiveness may be limited. It is best applied to control larvae just as the fruits are beginning to colour (usually before mid-June). Alternatively, it may be used to kill the adult beetles before the eggs are laid and before the flowers open, with a second application after flowering.

There are several species of aphid that affect cane fruits. Not all are economically damaging, but problems may arise if populations get out of control. Species such as the large and small raspberry aphids are important as virus vectors and are an increasing problem where they are able to overcome natural plant resistance. Several species cause crumpling or curling of leaves during the spring and summer. Severe attacks may result in premature leaf- fall, small fruit and weak canes. Foliage also becomes sticky and dirty with honeydew and sooty mould. Most species lay overwintering eggs on the host plant, hatching in March and April. Damage during early spring and summer is caused by generations of aphids feeding on developing leaves, shoots and flower trusses. All species produce winged forms (usually from May to July), most of which disperse to new canes close by. Sexual reproduction usually occurs between males and females in the autumn when overwintering eggs are laid. Eggs are deposited around leaf axils and buds of the host plants. Some common aphids that affect cane fruit are listed below:

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