Home-made organic pest control products offer an ecological, healthy and low-cost alternative to ready-made products available for organic cotton farmers in the Nimar region. Yet the recipes are not standardized and the products vary in quality and concentration of the active ingredients.udbioRe®, together with the Research Institute of Organic Agriculture (FiBL), engages in research activities to address this challenge and constantly improve pest management strategies in organic farming. The research activities are carried out as a combination of on-station trials and participatory on-farm trials with the farmers.udDuring the cotton cropping season 2013-14 one on-station and two on-farm trials were conducted with the objective of comparing different spraying intervals of the most commonly used self-made organic pest control products in order to identify an optimum level of crop protection. The study focused on the effect of the spraying intervals on the most important sucking pests (Cotton aphid (Aphis gossypii), Cotton jassid (Amrasca biguttula biguttula), Whitefly (Bemisia tabaci), Cotton mealy bug (Phenacoccus solenopsis) and Thrips (Thripidae)). Besides sucking pest incidences, data on plant stress symptoms and yield formation as well as economic parameters were also collected.udAdditionally, on-station trials were established to investigate different measures of early stage crop protection and to evaluate specific effects of three self-made products (Garlic-Onion-Chilli extract, Top Ten and Neem seed extract) against certain sucking pests.udThe products were prepared according to recipes standardized by bioRe® after careful research and hands-on experience of its associated scientists and extension workers. This knowledge was reproduced in pictorial technical leaflets which are easy-to-understand for the local farmers. A total of 11 leaflets - on seed treatments (2), early stage protection measures (1), pest control sprays (6), effective spraying technique (1) and growth promoter (1) were designed in both English and Hindi and will be used for dissemination activities.udOn-station results were inconclusive due to a low pest pressure in this year’s cotton season, as well as the small size of on-station trial plots. Results of on-farm trials revealed that a suitable strategy for in-field pest monitoring is needed for farmers to determine how often and at what time point pest control interventions are indicated. Further research is needed to understand the specific effects of home-made products on the different insect species. Optimized dosage and application techniques have to be worked out along with other options for integrated pest control (e.g. bird perches, border crops, soil enhancement practices) which could reduce the frequency of time-consuming spraying practices. These activities would best be conducted in on-farm rather than on–station trials.
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