Table 2.
Factors affecting over moths of different generations
| Moths number | Factor 1 (%) | Factor 2 (%) | Factor 3 (%) | Factor 4 (%) | Factor 5 (%) | Total (%) |
|---|---|---|---|---|---|---|
| Ln(G1) | A (66.6) | B (23.2) | C (2.7) | D (2.1) | E (1.7) | 96.3 |
| Ln(G2) | F (66.8) | G (7.6) | A (4.2) | H (3.1) | I (4.4) | 86.1 |
| Ln(G3) | J (77.4) | K (12.9) | L (5.0) | M (2.4) | N (0.6) | 98.3 |
| Ln(G1–G3) | O (88.1) | P (6.7) | G (2.2) | N (1.5) | Q (0.6) | 99.1 |
A: T mean in June; B: first appearance date of G1 moth; C: duration of G1 moth; D: precipitation in June; E: RH in June; F: last appearance date of G2 moth; G: Ln(G1 moth); H: duration of G2 moth; I: daily range between T max and T min in July; J: duration of G3 moth; K: wheat planting area; L: cotton planting area; M: first appearance date of G3 moth; N: corn planting area; O: Ln(G3 moth); P: Ln(G2 moth); and Q: precipitation in July.
The analysis of affecting factors for Ln(G1), Ln(G2), Ln(G3), and Ln(G1–G3) was based on the dataset of 1991–2015.