No chemical control is listed. Chrysanthemum leaf miner makes irregular tunnels in the leaves near the margins. Use applications of Orthene. Chrysanthemum lace bug sucks plant juices giving the leaves a bleached out appearance. Spray with Orthene or methoxychlor.
Mites cause the leaves to lose their good green color.
If the infestation is heavy, fine webbing may be seen at the branch tips. Spray with rotenone. The foliar nematode causes yellowish brown spotting of the leaves. The spots are more or less bounded by larger veins. The spots enlarge and run together so the entire leaf is involved.