The extracts obtained from Neem tree (Azadirachta indica) have been worldwide used indigenously as an insect pest antifeedant, and are known to be used by traditional medicine practitioners. The study was undertaken to investigate the impact of the synthetic pesticides and neem plant extracts on pollinators and crop yield of Pigeon Peas (Cajanus Cajan), and usage of the neem extracts on the field for pest management. The plant extracts were obtained in both aqueous and organic solvents. The insect pest infestation was more pronounced on untreated pigeon pea crop field compared to the field treated with neem extract or pesticide Dimethoate field. The field treated with neem plant extracts showed high frequency (abundance) and diversity in the numbers of pollinators of families Megachilidae and Apidae compared to the field treated with the pesticide Dimethoate. The activity of the active extracts was also performed in the dual-choice tests and No-Choice tests at different concentrations. The seed yield was high for neem extract treated field (2774 kg ha⁻¹) than dimethoate treated (1602.8 kg ha⁻¹) and untreated crop (1161.12 kg ha⁻¹). Therefore the finding showed that neem based pest control is more efficient and increased yield production than synthetic pesticides/insecticides treatment. The research findings and observations from this report proved that beneficial insects are not affected or harmed with application of Neem plant extracts, and can continue to perform their valued services even after the application of Neem plant extracts, whereas their numbers decreased significantly on treated plants with synthetic pesticides. This is an indication that the most significant alternative strategies for insect control is the use of botanical pesticides particularly Neem extracts, and may be the most efficient means to replace a wide range of synthetic pesticides. To our knowledge, this is the first study that was done in East Africa specifically in one of the hottest province (Eastern province) of Rwanda, and can help to contribute in plant protection as the use of dimethoate is prohibited in various parts of the word.

从印度em树（印度印A）获得的提取物已在全世界范围内广泛用作害虫的拒食剂，并且已知由传统医学从业者使用。进行了这项研究以调查合成农药和印ne植物提取物对鸽子豌豆（Cajanus Cajan）的授粉和作物产量的影响，以及印em提取物在田间用于害虫管理的用途。在水和有机溶剂中均获得了植物提取物。与用印em提取物或乐果杀虫剂处理过的田地相比，未经处理的木豆农作物田间的害虫侵害更为明显。用印em植物提取物处理的田地显示出高频率（丰度）和家庭传粉媒介数量的多样性与用乐果杀虫剂处理过的田间比较，甲壳纲和蜜蜂科。活性提取物的活性也在不同浓度的双重选择测试和无选择测试中进行。印ne提取物处理田（2774 kg ha ^-1）的种子产量高于乐果处理（1602.8 kg ha ^-1）和未经处理的农作物（1161.12 kg ha ^-1））。因此，该发现表明，基于印em的害虫控制比合成农药/杀虫剂处理更有效，产量更高。该报告的研究结果和观察结果表明，使用印em植物提取物不会对有益昆虫产生影响或损害，即使使用印em植物提取物后，有益昆虫也可以继续发挥其宝贵的作用，而使用印em植物提取物处理的植物中它们的数量却大大减少了。合成农药。这表明昆虫防治的最重要替代策略是使用植物性农药，特别是印em提取物，并且可能是替代多种合成农药的最有效手段。据我们所知，