KOLKATA: Tea production in North India which comprises Assam and West Bengal in June has been hard hit as heavy and continuous rain lashes the region. According to a rough estimate, production of second flush teas in June may decline by 20% -25% due to this continuous rainfall. Even the quality of second flush teas has been affected and the industry fears of a pest attack going ahead.Talking to ET, Sujit Patra, additional secretary, Indian Tea Association said "Till May the production was up. But due to heavy and continuous rains tea production is expected to be down in June this year compared to the same month last year. This is the second flush teas which is produced in volumes and a large portion of it is exported." Last June, India had produced 113.43 million kg of tea. It will be difficult to achieve this crop figure this year, industry officials said.Prices of both CTC and Dust teas have fallen this month as quality of the teas arriving at the auction has dropped significantly. Dust teas have fetched a price of Rs 172.73 per kg in this week's sale as compared to Rs 183 per kg in the same sale last year. Similarly, CTC teas are being available at Rs Rs 159 per kg as against Rs 170.44 per kg in the corresponding sale last year.However, orthodox tea producers have much to cheer as the prices have appreciated 33.6% on the back of a strong export market in Iran . Orthodox tea price is currently hovering around Rs246.44 per kg as compared to Rs 184.35 per kg during the same period last year. "Unlike last year, there is strong demand for orthodox tea from Iran. That is why prices are going up," said a tea broker . India produces 70 million kg of orthodox tea annually. Of this, 80% is exported to Iran.