Observations in the Negev, over two winter seasons, and the collection and maintenance of malvaceous plants from various Negev sites in the laboratory, showed that Earias insulana does not breed in the Negev during the winter, except in the most northern area (between Gaza and Beer Sheba). In the spring and summer, Earias insulana moths invade the Negev from neighbouring cotton-growing territories, and may infest cotton grown there. As indicated by light trapping the moths may reach as far as Eilat, and become most numerous in the autumn.
Observations in the Negev, over two winter seasons, and the collection and maintenance of malvaceous plants from various Negev sites in the laboratory, showed that Earias insulana does not breed in the Negev during the winter, except in the most northern area (between Gaza and Beer Sheba). In the spring and summer, Earias insulana moths invade the Negev from neighbouring cotton-growing territories, and may infest cotton grown there. As indicated by light trapping the moths may reach as far as Eilat, and become most numerous in the autumn.