Monday, September 19, 2011

Lawn grubs

much damage to target grubs in the lawn
vermin provides bare, dead spots in the lawn:

grubs under lawn

Grubs and beetle larvae.

The larvae feed on the roots of grass. Damage to lawns, golf courses and other sports fields is evident in July when the caterpillars are at their largest. The turf will be loose because the roots are devoured. This gives the lawn here and dried, dead, yellow or even open spaces. The birds like blackbirds, starlings, docks, rooks and crows, .. want to feast on the delicious thick and larvae scavenge in the withered grass patches. If you are an affected, rootless lifting sod rolls or you'll soon find dozens of larvae.

In heavily infested gardens, starting in May and June the adult beetles at dusk in large numbers from the grass fly up. The eggs are laid in the grass and it will then hatch out after a few weeks. The larvae feed on the first week even with humus-like, plant remains. Then they switch to the hair roots and finally all the plants roots to eat. The damage to the lawn will we even notice until the early autumn when the larvae have grown a lot. The larvae are thick, C-shaped and are 2 to 4 cm long. They are white with a brown head and have three pairs of legs.

As the temperatures drop in autumn, the larvae crawl deeper underground. In the spring when the temperature rises, they will come back up to the grass roots to eat. They overwinter as larvae and pupate in the soil in spring.
The adult beetles feed on the foliage of various plants in general but cause little damage.


Control:Give the lawn plenty of water and fertilizer to ensure that the best condition possible.Restore the damaged grass, new grass seed to sow or turf to lay. Poorly maintained lawns are more susceptible to damage. Give your lawn so preventive enough food and water. Rake enough against the moss to avoid damaging beetle larvae.A chemical control is not possible because there is currently no effective pesticides available for controlling grubs in lawns.The natural enemies of grubs, birds, hedgehogs and shrews, moles.
Biological control of the garden chafer beetle and the SallandElectronics (Hoplia philanthus) is possible with insect parasitic nematodes (Heterorhabditis bacteriophora). The June beetle and the bug are not susceptible to these nematodes.These microscopic nematodes will actively search for beetle larvae. If they penetrate a beetle larvae excrete bacteria on living in symbiosis with nematodes but which is fatal to the grub. The bacteria convert the intestines of the host in liquid foods easier to eat for the nematodes.The parasitic nematodes are very at ease with their eetparadijs multiply in the grub decomposes before that. Thereby spreading a new generation of useful nematodes can look for any remaining grubs. Infected beetle larvae or grubs turn from white-beige to bright red to brown and the insect glue verse makes it often difficult to find. The first grubs after two to four days may already be slain.This treatment can we best apply from mid July to September when the beetle larvae are located just below the turf. Furthermore, the floor temperature must not drop below 12 ° C and the survival of the nematodes as large as possible to the lawn before and after treatment are well watered. Under ideal conditions, 95 percent of all white grubs after only six weeks are slain. In the absence of food, the worms turn away.
Interestingly, these nematodes also the larvae of the weevil kill harmful.For best results it is important that these nematodes are highly organic and completely safe for humans, animals and plants.

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