The Investigations on seasonal fluctuations of tea mosquito bug Helopettis antonii Signoret was carried out by making observations In four guava gardens located at Main Agricultural Research Station, Dharwad and Navalur, a village around Dharwad (Farmers field). The cultivars L-49 and Navalur local were used for the purpose at both the locations during 1999-2000. At Dharwad, the pest incidence on fruits was at its peak during second fortnight of October in cv. L. 49 (20.53%) and on Cv. Navalur local the maximum infestation was during second fortnight of November (61.33%) and started declining there after and vanished from February onwards. However, at Navalur on Cv. Navalur local it increased during second fortnight of August on fruits (21.77%) and started declining through September, October but suddenly reached to it second peak and vanished there after from November onwards. The observations made on cashew during off season indicated that it served as an alternate host for feeding and breeding of H. antonii. At Navalur location, the bug incidence on young leaves was at its peak during second fortnight of September on Cv.L-49 (24.3%).