Without insecticides to control the Crane fly larva, we will have to rely on the use of entomopathogenic nematodes to reduce the number of leatherjacket in the soil. Applied as a drench with the addition of Nemaflo, the nematodes move through the moist soil to find Craine Fly larvae.
Sportnem-T contains the insect pathogenic nematodes Steinernema carpocapsae.These are effective against a number of turf pests, especially the larvae of crane flies (Tipula spp.) and others.
Once the nematodes have been released into the soil, they seek out the larvae and penetrate them via the epidermis or via natural orifices such as the mouth, the anus, and breathing holes. The nematodes feed on the contents of the grubs, excreting specific bacteria from their digestive tracts as they do so. Adult crane flies only live for a few days. Some species have one generation per year, while others produce several generations in a year. As soil temperatures drop, larvae go deeper into the soil and hibernate.
Best results are achieved when application starts at first signs of larvae, rather than retrospectively.When the crane flies start appearing, they will be laying eggs. Two weeks later, these eggs will turn into larvae (usually around mid-September). Young larvae are more susceptible to nematodes. Chafer adults will be found feeding on local trees and shrubs in May/June. These will start laying eggs in July.
Number of Applications
Leatherjackets tend to have a more concentrated window when the grubs are susceptible to the nematode. Sportnem H is a nematode that lies in ambush, so uses less energy, leading to a longer active life. This means only one or two applications may be needed. Chafers will be laying eggs over a longer window, so 2 – 3 applications are recommended to give high percentage of success.
Applying both Sportnem T and Sportnem H if both pests are present
Just mix and apply. However, different nematodes are not compatible long-term. This means that we will not supply both nematodes in the same packs.
Immediately upon arrival, open and store the individual 250 million packets in the fridge until ready to use. If refrigerated between 2-60C and kept in the dark, Sportnem nematodes should remian alive for over 4 weeks.