New Delhi, 22 April (NNS): The prices of black pepper markara improved by Rs 10 to Rs 655 per kg owing to the limited support of buying at the higher level. Before this, the prices have gone up by Rs 40/45 per kg. The arrivals and the prices remained stable at the same level in Kochi during the previous day. The market sentiments may affect due to the limited selling from the farmers. The spot black pepper prices will likely to remain strong during the near future.