| mating and pseudothecial development in mycosphaerella citri, the cause of citrus greasy spot. | abstract greasy spot, caused by mycosphaerella citri, is a serious disease of citrus in the caribbean basin. m. citri is a loculoascomycete and produces pseudothecia in decomposing leaves after intermittent wetting and drying. a new in vitro mating technique was developed for production of pseudothecia on sterilized leaf disks in petri dishes. of the single-ascospore cultures that were recovered from individual asci, four were one mating type and four were a second mating type (tentatively desig ... | 2004 | 18943074 |
| environmental factors affecting the release and dispersal of ascospores of mycosphaerella citri. | abstract greasy spot, caused by mycosphaerella citri, produces a leaf spot disease affecting all citrus species in florida and the caribbean basin. m. citri produces pseudothecia and ascospores, which are considered the principal source of inoculum, in decomposing leaves on the grove floor. in studies using a computer-controlled environmental chamber, a single rain event triggered release of most mature ascospores beginning 30 to 60 min after the rain event. additional rain events did not bring ... | 2003 | 18943870 |
| environmental factors affecting pseudothecial development and ascospore production of mycosphaerella citri, the cause of citrus greasy spot. | abstract mycosphaerella citri, the cause of citrus greasy spot, produces pseudothecia and ascospores in decomposing leaf litter on the grove floor. in laboratory studies, the effect of wetting and drying and temperature on the formation, maturation, and production of pseudothecia and ascospores was evaluated on mature, detached grapefruit leaves. production of pseudothecia was most rapid when leaves were soaked five times per week for 2 h per day, but pseudothecial density and total ascospore pr ... | 2002 | 18943880 |
| a computer-controlled environmental chamber for the study of aerial fungal spore release. | abstract an environmental chamber was designed to study aerial release of spores of ascomycetes and hyphomycetes, based on a device developed by c. m. leach. relative humidity (rh), temperature, red (660 nm) and infrared (880 nm) light, leaf wetness, wind speed, vibration, and rain events are controlled and monitored within the chamber via an rtc-hc11 real-time controller and data-acquisition system. a basic11 computer program is uploaded to and controls the system. the program requests values f ... | 1997 | 18945044 |