Graph: The percentage repellent the brown planthopper ages 3 after spraying.
From the graph can be classified into plant extracts with % chasing brown planthopper have been divided 3 groups as following.
group 1 tobacco extract effective insect repellent as much as possible.
group 2 extracts from Non-tai-yak, Eucalyptus, Derris, Neem, Siam weed and Heart-leaved moonseed which these substances are effective in insect repellent is no different. So it can be used as evidence.
group 3 control no effective in insect repellent.