ABSTRACT
E. polyphaga HAMM.) .......................................................................................... 169 6.4.3 Downy Mildew (Peronospora radii de BY., Syn. Peronospora danica GÄUM.;
Plasmopara leptosperma [de BY.] SKAL., Syn. Peronospora leptosperma [de BY.] GÄUM.)................................................................................................... 169
6.4.4 Chamomile Rust (Puccinia matricariae SYD., Syn. Puccinia tanaceti D.C. a. L.)................................................................................................. 169
6.4.5 White Rust (Albugo tragopogonis [PERS.] SCHROET.)...................................... 170 6.4.6 Leaf Spot Disease (Stemphylium botryosum WALLR.) ........................................ 170
6.5 Plant Parasites..................................................................................................................... 170 6.6 Herbivory ............................................................................................................................ 170
6.6.1 Chewing Herbivores on Roots and Stem Bases .................................................... 170 6.6.2 Gall Formation on Roots........................................................................................ 170 6.6.3 Chewing Herbivores on Leaves and Shoots .......................................................... 170 6.6.4 Sap Sucking on Leaves and Shoots ....................................................................... 171
6.6.5 Leaf and Stem Mining ........................................................................................... 171 6.6.6 Herbivores Mining and Chewing on Flowers........................................................ 171 6.6.7 Sap Sucking on Flowers......................................................................................... 172 6.6.8 Other Quality Deteriorations Caused by Insects ................................................... 172 6.6.9 Stock Pests.............................................................................................................. 172
Numerous abiotic and biotic stress factors can affect plant growth and survival, and the quantity and quality of drug yield. This chapter presents some of the most common diseases and stress agents of chamomile plants. Additional diseases may affect the two chamomile species, and the frequency and type of disease will vary with the local climate.
