Abstract
The study assessed the effectiveness of Savanem 20 EC (Ethoprophos, 200g/l), a newly introduced nematicide on the plant-parasitic nematodes associated with sweet pepper (<em>Capsicum annuum</em>), the second most important vegetable crop after the onions in Niger. This product was compared with Furadan 5G (Carbofuran). The results show that Savanem 20 EC at the rate of 50 L/ha is more effective than Furadan at the rate of 40 kg/ha in suppressing population of <em>Meloidogyne</em> spp. and reducing the root gall index. Despite its higher effectiveness against root-knot nematodes, Savanem did not significantly out yield Furadan.
Highlights
Sweet pepper (Capsicum annuum), the second most important vegetable crop in Niger, after onions is grown all over the country, but the region of Diffa alone accounts for over 85% of national production
The average fruit yield of the crop is about 17 t/ha. This is very low compared to the potential of the crop. This low yield is partly due to diseases and pests pressure, namely the damage caused by plant-parasitic nematodes
In Niger, several species of parasitic nematodes, including the root-knot nematodes belonging to the genus Meloidogyne are found on sweet pepper. (Haougui, 1999; Zakari, 2008; Oumar, 2010; Djibey, 2012)
Summary
Sweet pepper (Capsicum annuum), the second most important vegetable crop in Niger, after onions is grown all over the country, but the region of Diffa alone accounts for over 85% of national production. Sweet pepper is the second most important export crop after onions. The average fruit yield of the crop is about 17 t/ha This is very low compared to the potential of the crop. This low yield is partly due to diseases and pests pressure, namely the damage caused by plant-parasitic nematodes. Higher yield losses are observed in the monoculture system where nematode attacks often lead to the failure of the pepper crop (INRAN, 1999; Haougui and Kollo, 2006)
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