is 10.6 million tonnes. According to the Thai Confederation of Tapioca Farmers, the average household makes about 53 baht (US$1.70) per rai per month from tapioca cultivation. Fruits and vegetables Thailand is a leading producer and exporter of tropical fruits such as durian, mangosteen, rambutan, longan, salak, and langsat (longkong). Durian Thailand is ranked the world's number one exporter of durians, producing around 700,000 tonnes of durian per year, 400,000 tonnes of which are exported to China and Hong Kong. Tomatoes In 2017, Thailand produced 122,593 tonnes of tomatoes. The northeast produces 55 percent; the north, 32 percent; and the central region, 13 percent. The highest yielding provinces are Chiang Mai, Sakon Nakhon, Nakhon Phanom, and Nong Khai. Growing tomatoes in prime areas can generate profits of up to 40,000 baht per rai. The northeast's contribution is in jeopardy due to the construction of upstream dams on the Mekong River. The dams have depleted river banks of nutrition-rich sediments and have produced unseasonal inundations as dams release water in the dry season to maintain power generation and river navigation. Samples from Chiang Mai 1994, analysed by Nishimura et al 1999, showed Phytophthora infestans of only one type, the A1 (specifically US-1) population, on tomato. Petchaboon et al 2014 analysed 53 samples from 2000-2002, and found them all to be A1, and of those all but one were US-1 clonal lineages, agreeing with the above results of Nishimura and also Gotoh et al 2005. Non-food crops Hemp it is legal to produce, import, and export hemp in Thailand. The plant was removed from the government's list of narcotics in 2019. According to the Thai Food and Drug Administration (FDA) the plant can be used as a key ingredient in many food and cosmetic products. Rubber Thailand ranks as the world's largest rubber producer and exporter, producing around 4.3 to 5 million tonnes per year, It consumes only 519,000 tons per year. It provides about 40 percent of the world's natural rubber, mostly used in aircraft and automobile tires. But the rubber industry has faced a series of challenges. Alongside drought in 2015-2016, Thailand was hit hard by an oversupply in international rubber markets. Following a record harvest in 2011, Thailand increased rubber acreage by 45 percent. Other top producers in the region followed suit. Concomitantly, China's demand for rubber decreased by 10 percent. China is the world's largest natural rubber consumer,