31. The large variety of crops in a small space also prevents plant diseases from spreading easily 32. China had imposed long-standing bans on these products on the grounds of worries about plant diseases . 33. Returning to New Zealand he rejoined the DSIR and rose to direct its plant diseases division. 34. These cultivars are less attractive to plant diseases . 35. Viruses cause plant diseases such as leaf mosaic. 36. Phytopathology is the study of plant diseases . 37. For a list of " Calathea " diseases, see List of foliage plant diseases ( Maranthaceae ). 38. Plantix is an app that provides information on over 170 plant diseases worldwide by using optical patterns. 39. Invasive plant pathogens and insect vectors for plant diseases can also suppress agricultural yields and nursery stock. 40. It said lack of rain and unusually warm weather has allowed pests and plant diseases to flourish.
