THE EFFECTS OF EFFECTIVE MICROORGANISMS, A BIOSTIMULANT AND THE TREATMENT METHOD OF FORECROP STRAW ON HEMIMETABOLOUS HERBIVORES IN WINTER WHEAT
Background. Winter wheat is one of the most important field crops grown both in Poland and in the world. While growing it is exposed to the attack of fungal pathogens, weeds and animals, including insects, whose numbers are increasingly being limited by non-chemical methods.
Material and methods. The effects of the application of pro-ecological practices (effective microorganisms ‒ EM Naturalnie Aktywny and biostimulant ‒ Asahi SL products) and of the forecrop straw management methods on the number of noxious hemimetabolous species found were compared in a three-year field study. In developmental stages of winter wheat insects were collected with an entomological net. Their density was compared and the results are presented as individuals per plot.
Results. It was found that the cereal aphid is the most numerous pest feeding on winter wheat, especially during its milk-dough maturity stage. The bird cherry-oat aphid, thrips and Miridae were less numerous. The use of environmentally friendly treatments during wheat growth resulted in a smaller catch of these insects compared to the control. Bird cherry-oat aphid and thrips are more likely to feed on plants growing on plots with plowed straw, and Miridae on those with removed straw. However, the method of use of previous crop straw did not modify the number of cereal aphids.
Conclusion. The use of the products EM Naturalnie Aktywny and Asahi SL during wheat growth will allow for a reduction in the number of herbivores with piercing-sucking mouthparts.