Sentence examples for on infestation from inspiring English sources

This suggested that selection of genotypes and species that are tolerant of H. robusta attack based on infestation of young plants may not be appropriate.

Preliminary results report that with LAS no over sprayings occur, sprayings are based on infestation risk, cultivation characteristics, and meteorological conditions.

In this study, we examined the influence of changes in two elements of landscape composition, natural grassland cover and cover of a highly suitable crop host, on infestation by a generalist insect pest in wheat, and parasitism of this pest by its dominant natural enemies.

Surprisingly, we found no significant influences of increasing natural grassland habitat, at either local or landscape scales, on infestation by the wheat stem sawfly, Cephus cinctus, or parasitism of this pest by the native parasitoid wasps, Bracon cephi and Bracon lissogaster.

Our findings indicated that high latitude combined with open landscape, presence of low vegetation and high reindeer density provided more favorable conditions for sustaining of high degree of warble fly infestation, and furthermore, that any possible effect of ivermectin treatment on infestation rate was ruled out by the higher effect by the above factors.

The strong effect of time in the surveillance phase on infestation (Tables 4, 5) suggests a dynamic pattern of recolonization.

While there have been anecdotal reports of reduced sensitivity and potential resistance of sea lice to emamectin benzoate, particularly in Chile, few published studies have examined the efficacy of emamectin benzoate on infestations of L. salmonis in farmed Atlantic salmon since regular treatment began in Scotland in 2002 [26], [27].

We then retrospectively analyzed data on infestations of 15,839 birds captured in Scandinavia in 1991 that matched the species composition of this study (Table 2) (5 ).

Overall, we show high tick species richness and year-round high levels of infestation on rodents by several different nidicolous ticks in areas where A. phagocytophilum is enzootic, including on reported reservoir species.

Future studies should determine, in the field, the exact implications of the higher susceptibility levels of Bt maize on aphid infestation levels and also on the performance of parasitoids and predators.

Nonetheless, hypotheses coherent with the results found may be raised, based on other information on the environmental sanitation in these areas and on building infestation surveys carried out subsequently.