Effectiveness of Azadirachta indica and Melia azedarach in the control of storage pests of rice, corn, and legume

Among the different treatments applied, the use of ground neem seed gave the best protection for rice up to seven months. In corn, the most effective treatment was also ground neem seed which was effective up to seven months. The number of weevils recorded among the three crops was significantly different among each other every month at 2.5 mo after treatments. The most number of weevils were found in rice, followed by corn, and the least number was recorded in mungbean. However, at five and seven months after treatment, the highest number of weevils was found in corn, followed by rice. The least number was found in mungbean. After 10 mo, corn had the most number of weevils, followed by mungbean, and the least in rice. Among the different treatments in rice, those treated with ground neem seeds had the least number of weevils counted, followed by Ground chinaberry seed, neem oil, neem leaves, insecticide treated with the control having the highest number. These number of weevils recorded at 2.5 mo after treatment were significantly diferent among the different treatments. In corn, the least number of weevils was recorded in bags with ground neem seeds, followed by neem oil, insecticide-treated bags, control, and bags with ground chinaberry seed, with the highest from bags with dried neem leaves. All the treatments in corn were significantly different among each other. In mungbean, the least number of weevils was recorded in bags with ground neem seed, followed by bags with dried neem leaves, neem oil, and ground chinaberry seeds. The number of weevils in these four treatments was not significantly different among each other. The highest number of weevils in mungbean was recorded in the control, followed by the insecticide-treated mungbean. These two were significantly different from each other and from the four treatments mentioned earlier. At five months after treatment application, the least number of weevils recorded for each crop was found in the bags treated with ground neem seeds. The highest number of weevils was found in the control. All the different treatments were significantly different from each other and the best protection was obtained from ground neem seed. The same was true with corn and mungbean. At seven months after treatments, ground neem seeds still gave the best protection in rice with an average of only 2.5 weevils per treatment, followed by dried neem leaves with 8.75. But this time the highest number of weevils was found in the insecticide-treated rice, followed by the control. Again, all the treatments in rice gave signficantly different results. In corn, although the treatments gave significantly different results, the protection obtained at this period was not enough because of the high population of weevils in each treatment. In mungbean, the best protection was obtained from ground chinaberry seeds, followed by ground neem seeds, and insecticide treatment. The most number of weevils in mungbean was found in the dried neem leaves. At 10 mo after treatment, the number of weevils in corn, rice, and mungbean were not significantly different among each other. The same was true with those of the different treatments, although these were numerically different. Statistical analysis revealed no significant differences among each other