Efficacy of Garlic (Allium sativum) and Red Chilli Pepper (Capsicum annum) Extracts in the Control of Red Spider Mite (Tetranychus urticae) in Tomatoes (Lycopersicon esculentum)
Keywords:
Tetranychus evansi, tomato, Allium sativum, Capsicum frutescens, efficacyAbstract
A trial to assess the efficacy of extracts from garlic (Allium sativum) and red chilli (Capsicum frutescens) as natural pesticides in the control of red spider mite (Tetranychus evansi) on tomatoes was conducted in Buhera District, Zimbabwe between 2013 and 2014.The experiment was laid out in a Randomised Complete Block Design with three replicates and five treatments as follows; 1. Red chilli, 2. Garlic, 3. Red chilli + Garlic (in the ratio 1:1), 4. Control (no treatment) and 5. Dimethoate 40% ec. The treatments were applied two weeks after red spider infestation and fortnightly until harvesting. Significant differences (P<0.001) were observed with respect to plant height, red spider mite infestation, webbing and total yield of tomato fruits. At 12 weeks after planting dimethoate had the highest plant height of 55.4 cm followed by red chilli with 47.6 cm.The dimethoate treatment had the highest yield of 88.5 tonnes per hectare followed by a combination of red chilli and garlic with 85.2tonnes per hectare and no yield was recorded in the control treatment. The experiment showed that extracts of red chilli and garlic have potential to control red spider mite (Tetranychus evansi) in tomato production.
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