Environmental Friendly Way of Managing Rice Weevil, Sitophilus oryzae L.

This innovation appeared on my radar after my discussion with my supervisor on how to handle infection of pest towards rice grains. As I currently enrolling my master degree in agriculture, I am inspired by the usage of natural resources to develop a new potential bio insecticide. I have a piece of basic knowledge of pest management and I decided to use these advantages to create a new insecticide that has ecological friendly for usage of the consumer.

What is it about?

Insects inflict injuries towards crop and stored products by infected directly and indirectly during securing food. Insects have been giving significant impact on humans in many ways including damage to all kinds of crops, infesting food and food storage. Pest insect that knowingly regarded as the most widespread and destructive in stored grains is Sitophilus oryzae L. or also known as rice weevil. Rice weevil is categorised in class insect, order Coleoptera and family Curculionidae.

In this millennium era, the rice industry has largely implemented synthetic chemical approach for controlling pest in rice storage. Excessive usage of this implementation has caused an increment of pesticide residue in food as they were exposed to chemical contamination. In order to prevent this situation, I have suggested to my supervisor to explore studies into a new bioinsecticide development from an abundance natural source, which is weed.

My ultimate aim for this innovation is to design a new formulation of bioinsecticide for usage in rice storage protection, as there will be more research on the bioactive compounds identification of weed species by chemical profiling. Besides that, I also intend to investigate the toxicity of crude plant extracts against rice weevil and by evaluating the formulation process of potential and efficacy of the new bioinsecticide for rice weevil. From the previous discussion, my supervisor and I have decided to conduct this research by involving these following processes:

  • Weed sample collection, ground into powder, soaked in solvent for 3 days and concentrated
  • Chemical profiling of each extract recorded by using GC-MS
  • Screening test towards rice weevil at different doses response (0, 1, 10, 100, 1000, 10000 ppm)
  • Construction of phase diagram and design of formulation
  • Contact toxicity bioassay of the formulated extract
  • Statistical analysis

The succession of my research will transform weed species into a useful bioinsecticide that will be valuable towards the rice industry. The initiatives for the project include weeds collection and screening test of the crude sample towards rice weevil by developing new bioinsecticide. So far, the results of toxicity from the selected allelopathic weeds on rice weevil are promising and I am continuing research on the suitable formulations for the extract. This innovation will also give positive social impact as it will control the infection of rice weevil on crop storage and it is environmental friendly. From this research, I strongly believe that this innovation will give benefit towards all farmers, rice industry and consumer as it will protect rice storage from rice weevil and perhaps, any pest insect infection.

Nurul Hazwani Mohamed, Malaysia


  1. Rice weevil found during storing are very inconvenience especially in rice company as they can effect the economical loss. Using chemical pesticides can reduce the loss. However, it can be harmful towards human consumption. By changing to bio insecticide to kill the rice weevil are very thoughtful as they are more natural. Good research.

    Liked by 5 people

  2. I believe this innovation idea will be good way to develop operations research in particular field. This method will be good introductory for reducing chemical usage and alternating it with natural input which giving long term benefits. Looking forward the execution.

    Liked by 5 people

  3. really nice point of view on using bio pesticide to control rice weevil. however, a lot of procedure to achieve the in product. i wish you, all the best.

    Liked by 3 people

  4. Really good research where prevention can take action. For me, its a good idea where we can increase agriculture production by knowing the root cause.

    Liked by 2 people

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