21. That interaction is called gene-for-gene relationship and is, in general, widespread in plant diseases . 22. Bacteria cause plant diseases including leaf spot and crown galls. 23. The uplands have traditionally suffered from drought and infertile soils, weeds and plant diseases . 24. For diseases of " Asplenium ", see List of foliage plant diseases ( Polypodiaceae ). 25. Qualitative zymoblot is of great potential use in diagnosis of human, animal and plant diseases . 26. It was also subject to plant diseases and pests. 27. Pests and plant diseases also have to be removed. 28. Third, plant diseases and adverse weather plagued sugar crops. 29. Under his leadership many crucial researches were successfully completed on plant diseases of economic crops. 30. Also in context of biological control of plant diseases cytokinins seem to have potential functions.
