Aiga Kraukle, Thawj Tswj Hwm ntawm Pawg Thawj Coj ntawm Lub Koom Haum Cov Neeg Loj Hlob thiab Qos Qos, tau hais tias xyoo no cov qos yaj ywm sau hauv Latvia qis dua qhov nruab nrab ntawm cov xyoo dhau los.
Qhov poob ntawm cov qoob loo xyoo no nyob ntawm qhov chaw huab cua ntawm qhov chaw (tshav kub thiab drought) thiab lub sij hawm cog, Colorado qos beetle loj heev puas cog qoob loo. Cov qos yaj ywm uas tau cog tom qab cog tau ntau dua yields.
Tom qab drought, huab cua ntub sai sai, tubers deformed thiab tawg.
Kev tawm tswv yim txog cov teeb meem kev lag luam ntawm cov qos yaj ywm cog rau hauv kev sib txuas nrog kev txo qis ntawm cov qoob loo thiab cov qoob loo zoo, Kraukle tau taw qhia tias muaj cov neeg tsim khoom uas yuav tsis tuaj yeem them rau cov chiv thiab cov khoom tiv thaiv cov nroj tsuag.