Dr. Eduardo Paningbatan Jr., a retired soil scientist from UP Los Baños, has a very practical way of preventing insect attack on his plants. Like the Arugula that he is growing in baskets made of coco coir and coco peat which he nourishes  with his special plant nutrients. 

What does he do? Well, very simple my dear Watson. He grows together his Arugula and mint in one hanging basket. The mint drives the insects away.