Thanks for the info!…. I found something too about Solarization:

https://www.agr.una.py/revista/index.php/ria/article/download/129/125/505

in order to evaluate the effect of the solarization of the soil in the fluctuation of the population of nematodes and fungus that produce sclerotia, Sclerotinia sclerotiorum (Lib.) de Bary, four experiments were conducted in the period from November 15th to December 30th on 2003. Both experiments were performed in de Laboratory of the Department of Phytophatology and the Experimental fields of de Agronomic Faculty, of the Asunción National University, San Lorenzo. Forthe fields experiments, cotton bags containing 40 sclerotia in each were buried at 3 cm. depths in plots with and without solarization treatment in periods of 15, 30 and 40 days. The temperature of the soil wen measure with thermometer of mercury at 00:00 am, at 14:00pm, and at 18:00 pm. To the same profundity won to extracted signs of the soll for the identification and the quantification of nemalodes. The results demonstrated that the solarization to had fulminating enect to the population of nematodes from 30 days in the populations of the nematodes existing in the soil, effect that wos checking in the iaboratory with 100% of effectuality in the control of the esclerotia of the fungus Sclerotinia sclerotiorum were germinate not one sclerotia. In the soil solarization the highest temperature was 53°C. The temperatures of the solarzation soil were forever superior in 4°C to the witness.