TABLE 2.

In vitro effects of culture filtrates of P. fluorescens strains on M. incognita egg hatching and juvenile mortality

Strain or LSDa	Hatchingb	Mortalityb
Control	83a	18a
CHA0	51b	56b
CHA89	77a	25a
CHA805	70a	31a
LSDc	17	14

^aStrains CHA0 (wild type), CHA89 (gacA), and CHA805 (aprA′-′lacZ) were grown in 1/20 King's B medium for 48 h. The control consisted of sterile medium.

^bHatching and mortality were tested as previously described (22) and are expressed as the percentage of eggs hatched after 72 h of exposure and as the percentage of juvenile mortality after 24 h of exposure, respectively. Data for each strain and medium were obtained from three different experiments with six repetitions. Means of the experiments in each column followed by different letters are significantly different (P ≤ 0.05) according to Fisher's test.

^cLSD, least significant difference.