Whitefly Bemisia tabaci (Gennadius) is well-known as serious pest on economic plants all over the world. In this study we examine the effect of geomagnetic field on the whitefly B. tabaci flight to the cardinal (north, south, west and east) and halfway (north-east, southeast , northwest and southwest) directions in Jeddah of Saudi Arabia. Also, we studied the effect of geomagnetic field on the attraction of B. tabaci adults to five colors (yellow, orange, green, blue and violet). We found that , B. tabaci females oriented to the cardinal and halfway directions significantly more than males. Also, there were no significant differences in the total numbers of B. tabaci adults attracted to the four main directions. South east was significantly the most halfway direction which B. tabaci attracted to. Statistically, yellow color was significantly the most attractive color, while blue and violet were the least colors preferred by B. tabaci
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