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Allowing some leaves to remain on your lawn can benefit both the yard and various insect populations. "If you have just a few leaves, such as 20 percent of the lawn covered, you can just ignore them.
Some grubs pack a triple whammy. They infest plant roots. Predators shred the lawn for grubs. And those that become Japanese beetles ravage plants.
As the season shifts from summer to fall marked by cooler weather and leaves changing color and falling, lawn and garden maintenance shifts, too. The lawn may soon be covered in piles of leaves ...
It is responsible for a disease (commonly called milky spore) of the white grubs of Japanese beetles. The adult Japanese beetles pupate in July (in the Northeast United States) and feed on flowers and leaves of shrubs and garden plants. During this adult stage, the beetles also mate and the females lay eggs in the soil in late July to early August.
Because grass grub build up large colonies in the soil, disease can spread quickly and be devastating to the population. The most common disease of the New Zealand Grass Grub is Amber disease. Amber disease is a chronic infection of the stomach of grass grub larvae, and is caused by two strains of bacteria, Serratia entomophila and S ...
The larvae, known as "chafer grubs" or "white grubs", hatch four to six weeks after being laid as eggs. They feed on plant roots, for instance potato roots. The grubs develop in the earth for three to four years, in colder climates even five years, and grow continually to a size of about 4–5 cm, before they pupate in early autumn and develop ...
The grubs hatch by late July. The grub population consists mainly of first instars in early- to mid-August, second instars by early September, and third instars by mid-September to early October. In frost zones, the grubs feed until November, then move deeper into the soil. In frost-free areas, the larva will feed all winter.
Soil-dwelling nematodes are known to seek out and prey on Japanese beetle grubs during the subterranean portion of their life cycle by entering larvae and reproducing within their bodies. Varieties that have seen commercial use as pest control agents include Steinernema glaseri and Heterorhabditis bacteriophora. [4]
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