TABLE 2.

Preference of Heterorhabditis sp. strain HMD for bacterial lawns of the primary form (Vp) and small-colony variant (Vsm) of P. luminescens MD^a

Inoculum size (IJs/plate) and time after inoculation	Nematode stage	No. of nematodes/area of petri plate (mean ± SE) (n = 4)b
		Vp lawn	Middle area	Vsm lawn
1,400
1 h	IJs	822.3 ± 32.0a	20.25 ± 2.5c	535.75 ± 48.0b
24 h	Juveniles	1,039.5 ± 74.2a	3.5 ± 1.3c	319.75 ± 24.0b
8 days	Females	522 ± 52.2a	0.25 ± 0.3b	39.0 ± 6.9b
700
1 h	IJs	360.8 ± 46.3a	5.75 ± 0.9b	279.75 ± 26.4a
24 h	Juveniles	505.3 ± 59.9a	6.75 ± 0.3b	117.5 ± 16.5b
8 days	Females	122.25 ± 16.3a	0.5 ± 0.5b	39.75 ± 18.1b

^aPreference was determined on TSA plates over time at two inoculation levels of the nematode. 

^bValues in the same horizontal row followed by different letters are significantly different (P = 0.05, Student-Newman-Keuls test).