Table 4.
Detection of Salmonella in fertilizer, soil, foliar, and blueberry fruit samples in 2017–2018.
| Treatment | Fertilizer | Soil | Foliar | Fruit | |||
|---|---|---|---|---|---|---|---|
| March–April | June | August | |||||
| Pre | Post | ||||||
| CON | 0/4a | 0/8|8/8b | 0/8|1/8 | 0/8 | 0/8 | 0/12 | 0/12 |
| AS1 | 0/4 | 0/8|8/8 | 0/8|2/8 | 0/8 | 0/8 | 0/12 | 0/12 |
| AS2 | 0/4 | 0/8|8/8 | 0/8|2/8 | 0/8 | 0/8 | 0/12 | 0/12 |
a
Positive samples/total samples for each treatment; 2017 and 2018 production seasons with the same result was only reported once.
b
Positive samples/total samples in 2017|Positive samples/total samples in 2018; the positive results were confirmed by Latex Salmonella and PCR detection of invA gene; CON, standard fertilization; AS1, manure-derived ammonium sulfate; AS2, manure-derived ammonium sulfate applied in split applications; Pre/Post, soils were sampled pre-application/post-application of fertilizers in late March and early April; June, soils were sampled in June before fruit harvest; August, soils were sampled in August after fruit harvest.