Narcissus are a beautiful garden decoration, however, they are attacked by several pests and diseases. Their bulbs are most often fed by Lerodon equestris larvae and Eumerus strigatus larvae.When the larvae are feeding, the leaves turn yellow or do not grow from the bulbs in the spring.Inside the bulbs, whitish larvae approx. 18 mm long can be found. In turn, the thigh larvae feed on the bulbs. You can find 10-30 individuals of this species in one onion.
As a result of foraging, the bulbs turn brown and rot.Protection of plants from this pest is to dress the bulbs. One of the most dangerous diseases of narcissus is the gray mold of Botrytis narcissicola, a symptom of which is browning of the tops of the leaves. Later, brown discoloration appears on the flowers.During storage, the bulbs show brown discoloration and the bulbs begin to rotWhen the temperature is around 20 ° C and it is humid, a gray dust coating appears on the surface of the stains.
Bulbs should be treated before planting, and in later stages of development, plants should be sprayed.Another dangerous disease found in narcissists is Fusarium oxysporum. It is manifested by yellowing of the leaves, starting from the tops. Flower buds do not develop. The flowers are narrow and small when produced.
Onions turn brown during storage and may form the so-called mummies (the onions dry out).Often, a delicate beige coating appears on the base of the heels of infected onions, and the inner scales are browned. Such onions should not be planted into the ground. To avoid contamination, the bulbs should be treated with appropriate chemicals before planting. Remove the infested plants from the beds. During storage, sort the onions and remove those showing signs of infection.
