Maize is best stored against insect attack

Explanation

Maize is a type of grain that is often used as a food source for both humans and animals. However, it is susceptible to insect attacks during storage which can lead to significant losses. The question is asking how maize can be best stored to protect it against insect attack. Option A suggests that maize can be stored on a raised platform. While this may help to keep the maize dry and prevent it from being in contact with the ground, it does not provide protection against insect attack. Option B suggests that maize can be stored in fumigated silos. This is the correct answer as fumigation involves the use of chemicals that kill insects and their eggs, thereby protecting the maize against insect attack. Option C suggests that maize can be stored while still on the cob. However, this does not provide any protection against insect attack and may even make the maize more vulnerable. Option D suggests that maize can be stored in humid metal tanks. This is not a good option as high humidity can encourage the growth of mold and other fungi which can further damage the maize. In summary, the best way to store maize to protect it against insect attack is to store it in fumigated silos.