Table 4.
Trichoderma spp. late wilt control in the 2019 growing season 1.
| Growth Parameter | Control − | Control + | T203 + | T7407 + | ||||
|---|---|---|---|---|---|---|---|---|
| Mean | S.E. | Mean | S.E. | Mean | S.E. | Mean | S.E. | |
| Emergence (plants/m2)) 7 DAS | 16.1 A | 0.19 | 16.4 A | 0.40 | 15.7 B | 0.65 | 16.0 A,B | 0.26 |
| Root weight (g) | 43.5 | 4.5 | 38.7 | 3.9 | 34.4 | 3.7 | 42.4 | 3.9 |
| Shoot weight (g) | 240.9 | 12.2 | 217.5 | 16.2 | 212.8 | 9.5 | 242.7 | 16.8 |
| Shoot height (cm) | 169.0 | 2.9 | 168.2 | 4.7 | 168.8 | 4.2 | 177.6 | 3.1 |
| Cob wet weight (g) | 245.8 | 17.1 | 261.2 | 19.5 | 242.8 | 31.5 | 210.5 | 25.2 |
| Health index (1–4 | 1.2 | 0.2 | 1.2 | 0.2 | 1.3 | 0.2 | 1.5 | 0.2 |
| qPCR (Mm/Cox ratio) | 7.3 × 10−4 | 1.5 × 10−3 | 5.3 × 10−4 | 1.1 × 10−3 | 1.9 × 10−3 | 3.0 × 10−3 | 1.6 × 10−3 | 1.9 × 10−3 |
1 Maize average growth indices 85 days after sowing (DAS), 31 days after fertilization (DAF). The experiment was performed in a Prelude corn variety susceptible to late wilt. Control– are plots without a complementary inoculation. Control+ are plots with M. maydis complementary infection. The other treatments are infected plots with Trichoderma asperelloides (T203) and T. longibrachiatum (T7407). Health assessment was made on the whole plant and was based on four categories: healthy (1), minor symptoms (2), dehydrated (3), dead (4). Values represent an average of 10 replications ± standard error. If existing, a statistically significant (p < 0.05) difference between the treatments at the same measure is indicated by different letters (A,B).