TABLE 1.

Onion rhizosphere populations of B. cepacia complex species recovered on PCAT and TB-T media on three sampling dates in 2004

Speciesa	No. recovered on sampling dateb
	Day 172	Day 194	Day 195	Day 214	Day 243	Day 238
Population 1
B. cepacia	0		0		16
B. cenocepacia IIIB	0		57		38
B. ambifaria	6		21		12
B. pyrrocinia	0		0		0
Total B. cepacia complex	6		78		66
Population 2
B. cepacia	0		0		0
B. cenocepacia IIIB	0		44		33
B. ambifaria	82		35		26
B. pyrrocinia	0		0		0
Total B. cepacia complex	82		79		59
Population 3
B. cepacia	0		0		0
B. cenocepacia IIIB	13		90		30
B. ambifaria	28		4		35
B. pyrrocinia	0		0		0
Total B. cepacia complex	41		94		65
Population 4
B. cepacia		0		0		13
B. cenocepacia IIIB		0		0		0
B. ambifaria		0		0		1
B. pyrrocinia		0		0		0
Total B. cepacia complex		0		0		14
Population 5
B. cepacia		1		18		17
B. cenocepacia IIIB		0		14		7
B. ambifaria		67		25		16
B. pyrrocinia		0		0		0
Total B. cepacia complex		68		57		40
Population 6
B. cepacia		18		30		16
B. cenocepacia IIIB		0		53		60
B. ambifaria		36		10		27
B. pyrrocinia		16		0		0
Total B. cepacia complex		70		93		109

^aIdentification of isolates to the putative B. cepacia complex species level was done using a restriction fragment length polymorphism analysis of PCR-amplified recA as described previously (31, 34).

^bDay of the year 2004 when samples were taken.