Grape Mealybug phenology
Devin Carroll, Advanced Agricultural Services
(From various locations in the San Joaquin Valley)
Note: these dates are the first observation. We typically treat with residual materials about 10-15 days after the first appearance on leaves, or with knockdowns about 30 days after the first on leaves.
year |
2nd instar |
male cocoon |
egg sac |
hatch |
on leaves |
new male |
2000 |
|
4-11 |
5-11 |
6-5 |
6-12 |
7-11 |
2001 |
|
4-17 |
5-14 |
6-4 |
6-12 |
7-11 |
2002 |
|
4-17 |
5-15 |
6-4 |
6-14 |
|
2003 |
|
4-19 |
5-16 |
6-3 |
6-16 |
|
2004 |
3-20 |
4-3 |
5-5 |
5-25 |
6-8 |
|
2005 |
|
4-4 |
5-2 |
5-17 |
|
|
2006 |
3-24 |
4-14 |
5-19 |
6-2 |
6-14 |
|
2007 |
3-13 |
4-11 |
5-9 |
5-31 |
6-13 |
|
2008 |
3-11 |
4-16 |
5-15 |
6-4 |
6-16 |
|