Please tell me, are these sentences fgramatically correct? Than you in advance!
It has been established that subplots situated in upper part of slope of analyzing plot is a part of center of infection with maximum number of virus-vector nematodes under the usage of funnel method, the number of zero samples were about 50% (under the usage of Flagg method there were not zero samples and there was 100% of infestation of all plots in all replicates).
Percent ratio of virus-vector nematodes in samples from 1 to 4 block and in all field (S=1 ha) was being varied from 4,6 to 22,7 % and from 3,2 to16,3 % in new or self-liquidating (absence of host-plant is a likely explanation for reduction of number of nematodes).
We have obtained new data about nematicide, fungicide and antiviral activity of new environment friendly domestic and imported biopesticides and bioagents, bioactive strains of bacteria, antagonistic fungi and physiologically active substance (both vegetative and animal formation) with polyfunctional activity, we have studied their regulation effect on formation of epiphytotics of NEPO and Tobraviruses Trichoderidae and Longidoridae, also we have estimated their affect on host-plant.
Some context wouldn't go amiss. It's very hard to understand as it uses very specialied terminology.
I'm not a teacher, so please consider any advice I give in that context.