Gardening

Black bug


Main features


Black bugs are common insects throughout Europe, America and the Asian continent. They are harmless and odorless insects that do not cause great damage to agriculture, unlike their bright green cousins. This species joins in the spring, forming large flocks of adult individuals that settle at the foot of trees, sheltering from the sun. In winter black bugs they survive thanks to natural shelters where they hide, thus facing low temperatures. They feed mainly on sap and plant seeds and pose no threat to the crop. These insects are fond of malvaceae and linden, but they also feed on hazel, oak, oleander and hibiscus. The latter, therefore, are the main plants and trees infested with black bugs. This species, if necessary, can also feed on other small animals or even carcasses, sucking on the hemolymph.

Life cycle



To remember that, unlike the green bug, the black bug it does not produce any unpleasant odor if accidentally crushed. The black bugs they reproduce in spring. The females lay from twelve to sixty eggs, preferring a damp place in which to do it, sheltered from external agents or possible predators. The eggs are black and about 1 mm long. Once the eggs are hatched, the small larvae begin their life cycle. These become adult at the beginning of winter by going through five stages of evolution, until they reach the dimensions and the typical coloring of adult specimens. But we must pay attention to the larvae. If it is true that the adults are odorless, the larvae adopt a defense mechanism typical of this kind of insects: they emit an unpleasant odor thanks to three glands located on the dorsal side of the abdomen.

Dangers for crops



Those involved in agriculture will already be aware of the fact that green bugs are really harmful to their garden and that they represent a huge danger for plants and fruits. They are very infesting and prefer the most common plants found in almost all local vegetable gardens: tomatoes, beans, green beans, potatoes and cabbage. It is necessary, therefore, to be very careful with these insects if these plant species are cultivated. To be feared are also the Asian bugs, recently spread in the West, damaging in the same way for their own harvest. We should not, however, fear black bugs since these small insects are harmless, therefore, it is not at all necessary to run for cover. No chemical or homemade remedy to keep the black bug away: it prefers trees and shrubs, especially lime trees and hazels.

Black bug: How to defend ourselves



If the black bug is harmless, odorless and does not represent a danger to the world of agriculture, the speech is totally different when we speak of the green bug or, worse still, of the Asian one. The former has already been widely spoken. The Asian bug, instead, landed in the West first in the United States and then later in Europe, it is very harmful for plants. This species is the cause of extensive damage to fruit growing and horticulture. The mainly damaged species are the peach tree, the apple tree, the green bean, the soy, the cherry tree, the raspberry and the pear tree. To feed itself, this insect pierces the integuments of the host plant forming holes, called necrotic areas, on the outer surface of the fruits and leaves. This leads to the loss of seeds and the possibility that plant pathogens are transmitted to the affected plants. Due to the absence of natural predators, Asian bugs must be fought with chemical remedies and pesticides.