If on apple-tree there was plant louse, it is necessary to work immediately. Important not only to save tree from horde of wreckers, but also to destroy eggs which females of plant louse can lay until 17 times for life cycle.
What is plant louse?
Only at first sight the plant louse on apple-tree looks harmless insect. Hordes of insects are capable to destroy all green leaves on any fruit-tree.
Settling on rear sides of leaves, the plant louse quickly exhausts all nutrients, allocating at the same time pad. Waste products of plant louse cover tree with film which interferes with photosynthesis and becomes nutrient medium for development of diseases of bark. If in due time not to eliminate plant louse, the tree can cease to fructify and even to die.
Besides, due to abilities to migration, the plant louse by the whole colonies is capable to get over of the next cultures. For this reason, having noticed plant louse on apple-tree, it is necessary to process in a complex and other trees which are nearby.
The plant louse postpones larvae in cracks of tree or near kidneys. Thus females provide to posterity of condition for survival – after winter as soon as kidneys are dismissed, individuals get over on leaves and start further reproduction.
The plant louse has set of versions. The apple-tree is struck most often by krasnogallovy plant louse who also often locates on currant. The roundish little body of insects of these subspecies about 2.5 mm long, has yellow color. Larvae of krasnogallovy plant louse very small and white. About eight times during the season breed.
Yablonny plant louse it is accepted to call the individuals having gray color. Such plant louse can strike also other trees and bushes.
Means from plant louse on apple-tree
Experienced gardeners can remember many national recipes of fight against plant louse on apple-tree. For example, spraying by tobacco broth on soap solution. Rustic tobacco or the tobacco ashes divorced in water with addition of shaving from laundry soap is applied to such means. In this recipe tobacco is the basic striking element, and laundry soap is applied due to sticky qualities that means as long as possible remained on bark and not washed away by rain.
However practice demonstrates that folk remedies not always result in necessary effect (defeat of all colony). And for fight against this wrecker it is important to destroy not only already adult individuals, but also, what is more important, their eggs which perfectly transfer winter and are capable to revive defeat of apple-tree in the next summer season.
Spraying by solutions with addition of such medicines as Calypso, Provado, Detsis, Mospilan, Carbophos, etc. will allow to destroy plant louse and her eggs.
- Shows the greatest efficiency at extermination of young people and not created individuals. Active agents of Detsis are not toxic for the environment, the struck tree and the person. Also allows to struggle with Colorado beetle. No more once during the season is recommended to use him.
- It is effective only at hit directly on individual. The plant louse who has taken cover from influence keeps vital properties and ability to reproduction. Carbophos has pungent unpleasant smell, than safety from poisoning of livestock and animals is ensured.
- Active agents of this medicine have oily base which when spraying covers leaves and bark of apple-tree. It is not toxic to the environment and the person. Besides plant louse it is effective in fight against the whitefly.
- Is issued in the form of ready spray which processes the struck tree. Has strong effect which occurs after 8 hours from the moment of processing. At repeated use can cause accustoming in colony of plant louse therefore it is admissible to use Calypso along with other medicines which are not containing copper.
Prevention
In fight against plant louse on apple-tree and on other fruit-trees it is necessary to remember that growth of its population is promoted by ants. These hardworking insects cultivate plant louse because of the milk made by her. Therefore, at opportunity, on the site it is necessary to get rid of ants.
As assistants in fight against plant louse on apple-tree insects predators can act. For example, ladybugs.
It is recommended to clean off dry bark from trees in the fall. Thus the eggs laid by females of plant louse are removed.
One more elementary way of prevention – regular weeding of weeds as approach of plant louse to apple-tree can begin with them. The colony can move to tree as well from neighbour's trees. Therefore it is recommended to examine periodically plantings on site perimeter.