Alternative Methods to Manage Silverleaf Whitefly [Bemisia tabaci Gennadius (Hemiptera: Aleyrodidae)] in Zucchini (Cucurbita pepo L.)
, , et | 16 juil. 2023
À propos de cet article
Publié en ligne: 16 juil. 2023
Pages: 61 - 70
Reçu: 01 févr. 2023
Accepté: 01 avr. 2023
DOI: https://doi.org/10.2478/johr-2023-0002
Mots clés
© 2023 Juan Carlos Díaz-Pérez et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.
Effect of plastic mulch color and row cover on plant growth, leaf whitefly index (WFindex), and zucchini fruit yield (Trial #1). Values are means ± SE, fall of 2019
| Treatment | Plant fresh wt (g) | Whitefly index |
Marketable (1000 per ha) | Marketable (t per ha) | Fruit wt (g per fruit) |
|---|---|---|---|---|---|
| Mulch | |||||
| Black | 328 ± 34 | 3.0 | 101.3 ± 9.1 | 21.6 ± 2.6 | 208.0 ± 26.5 |
| White | 336 ± 36 | 3.2 | 131.8 ± 13.5 | 28.4 ± 3.3 | 216.8 ± 12.3 |
| Row cover | |||||
| Covered | 333 ± 32 | 1.8 b |
135.4 ± 11.0 | 28.1 ± 3.7 | 201.3 ± 12.9 |
| Uncovered | 331 ± 37 | 4.3 a | 108.6 ± 11.5 | 24.6 ± 1.9 | 236.0 ± 24.0 |
| Significance | |||||
| Mulch (M) | 0.882 | 0.972 | 0.180 | 0.298 | 0.845 |
| Row cover (C) | 0.971 | <0.002 | 0.094 | 0.360 | 0.218 |
| M × C | 0.667 | 0.994 | 0.829 | 0.820 | 0.706 |
Effect of plastic mulch color and particle clay applications on plant growth, leaf whiteflies index (WFindex), and marketable fruit yield in zucchini (Trial #2). Values are means ± SE, fall of 2019
| Treatment | Plant fresh wt (g) | WFindex | Marketable (1000 per ha) | Marketable (t per ha) | Fruit wt (g) | Leaf temperature (°C) | Mulch surface temperature (°C) |
|---|---|---|---|---|---|---|---|
| Mulch | |||||||
| Black | 521 ± 46 | 2.64 |
52.6 ± 2.9 b |
11.9 ± 0.9 b | 227 ± 11.9 | 36.9 ± 1.7 | 45.5 ± 2.6 |
| Gray | 509 ± 3 |
2.75 | 68.7 ± 5.0 a | 16.4 ± 1.6 a | 237 ± 11.4 | 36.2 ± 1.4 | 46.6 ± 3.1 |
| White | 462 ± 23 | 2.63 | 68.6 ± 5.9 a | 14.9 ± 1.5 ab | 217 ± 12.6 | 36.8 ± 1.2 | 46.8 ± 1.3 |
| Particle clay | |||||||
| Untreated | 488 ± 28 | 2.90 a3 | 58.0 ± 4.0 b | 13.0 ± 1.1 b | 225 ± 10.5 | 39.6 ± 0.9 a | 51.0 ± 1.4 a |
| Treated | 509 ± 32 | 2.44 b | 67.2 ± 4.2 a | 15.4 ± 1.2 a | 228 ± 9.3 | 33.7 ± 0.7 b | 41.5 ± 1.2 b |
| Significance | |||||||
| Mulch (M) | 0.508 | 0.708 | 0.007 | 0.018 | 0.468 | 0.737 | 0.798 |
| Particle clay (C) | 0.613 | <0.0001 | 0.032 | 0.035 | 0.645 | 0.0002 | <0.0001 |
| M × C | 0.990 | 0.079 | 0.335 | 0.069 | 0.092 | 0.865 | 0.188 |
Effect of organic insecticidal solutions on plant growth, whiteflies index (WFindex), and zucchini fruit yield (Trial #3). Values are means ± SE, fall of 2020
| Treatment | Plant fresh wt (g) | WFindex |
Marketable (1000 per ha) | Marketable (t per ha) | Fruit wt (g per fruit) |
|---|---|---|---|---|---|
| Neem oil | 777 | 2.7 b |
102 ± 2 | 16.6 ± 1.0 | 162 ± 9 |
| Soap | 717 | 2.6 b | 105 ± 6 | 16.8 ± 1.4 | 158 ± 7 |
| Control (water) | 602 | 4.1 a | 108 ± 8 | 17.0 ± 1.2 | 159 ± 6 |
| 0.283 | <0.0001 | 0.850 | 0.959 | 0.804 |
Effect of row cover on whitefly index (WFindex) odds ratio estimates and Wald confidence intervals in zucchini grown with row cover or uncovered, fall of 2019
| Odds ratio | Estimate | 95% confidence interval | |
|---|---|---|---|
| WFindex 2: With cover vs. Uncovered | 4.874 | 2.040 | 11.650 |
| WFindex 3: With cover vs. Uncovered | 2.181 | 0.608 | 7.819 |
Effect of organic insecticidal solutions on plant growth, whitefly index (WFindex), and zucchini fruit yield (Trial #3). Values are means ± SE, fall of 2019
| Treatment | Plant fresh wt (g) | WFindex |
Marketable (1000 per ha) | Marketable (t per ha) | Fruit wt (g per fruit) |
|---|---|---|---|---|---|
| Neem oil | 624 ± 74 | 2.7 ± b |
46.6 ± 3.9 a |
9.3 ± 1.0 a | 199 ± 10.4 |
| Soap | 631 ± 44 | 2.5 ± c | 34.1 ± 6.1 ab | 6.0 ± 1.3 ab | 181 ± 7.1 |
| Control (water) | 569 ± 49 | 3.7 ± a | 20.6 ± 5.7 b | 3.8 ± 1.2 b | 175 ± 22.1 |
| 0.693 | <0.0001 | 0.023 | 0.024 | 0.517 |