Repellent Effect of the Pandanus (Pandanus amaryllifolius Roxb.) and Neem (Azadirachta Indica) Against Rice Weevil Sitophilus oryzae L. (Coleoptera, Curculionidae)

Abstract

Listen

Translate article

Sitophilus oryzae is the main and highly destructive pest on storage products, such as rice, wheat, and cereal grains around the world. The substances that are safe and envi- ronmentally friendly are still being sought for managing this pest. One of the ingredients that are continuously being developed as an insecticide is natural plant susbtances. Hence, this research was conducted in the laboratory to evaluate the effect of Pandanus and Neem leaves powder on rice weevil. The repellency and mortality effects of PW and Neem to trice weevil were recorded. The repellency and mortality were caused by the treatment of 10 grams of pandan leaf powder and 10 grams of neem leaf powder. The treatment without a combination of insecticides in this study had a higher repellency and mortality effect than the combination. The aim of this study was to determine the effect of Pandanus (Pandanus amaryllifolius Roxb.) and Neem (Azadirachta indica) leaves powder on the repellency, mortality, and weight loss of grains due to Sitophilus oryzae. The methodes of this study used a completely randomized design (CRD) with 7 treatments and 4 replications. The results of this study indicate that the best treatment in terms of causing repellency was the treatment of 10 grams of pandanus with a percentage of 87.5%, while the best treatment in terms of causing pest mortality and was also able to reduce the risk of rice weight loss due to Sitophilus oryzae was treatment 10 gram of neem with a mortality percentage of 76.25% and weight loss of rice 3.14%. This research showed that neem leaf com- pounds are better in terms of causing mortality, while Pandanus compounds are better in terms of causing mortality of Sitophilus oryzae.