NOW Monitor
NOW MONITOR NEWSLETTER
JANUARY 2010
Why Navel Orange Worm is such a tough customer !
Navel Orange Worm (NOW) is a difficult insect to control for a variety of reasons.
| 1 - | It has different length generation times (as measured by Degree Days) in various crops and stages of crops. Mummy almond nuts require about 1,100 degree days for a generation New almond nuts require about 750 degree days for a generation Pistachios require about 835 degree days for a generation |
| 2 - | NOW has no diapause like other some other insects. So the insect never “sleeps” in the winter. It keeps eating and growing on mummy nuts. |
| 3 - | NOW spends more of its time as a energy obtaining (i.e. eating) larvae as compared to other common insect pests. NOW spends almost double the time eating as other common orchard insect pests. |
Peach Twig Borer
Generation Time 1060 degree days
Biofix to egg hatch 220 degree days or 21% of the generation time
Larval stage 507 degree days or 47% of generation time
Pupal stage 333 degree days or 32% of generational time
Oriental Fruit Moth
Generation Time 863 degree days
Biofix to egg hatch 193 degree days or 23% of the generation time
Larval stage 387 degree days or 44% of generation time
Pupal stage 283 degree days or 32% of generational time
Codling Moth
Generation Time 1,118 degree days
Biofix to egg hatch 216 degree days or 19% of the generation time
Larval stage 471 degree days or 43% of generation time
Pupal stage 431 degree days or 38% of generational time
Navel Orange Worm - Mummy Almond Nuts
Generation Time 1,100 degree days
Biofix to egg hatch 99 degree days or 9% of the generation time
Larval stage 888 degree days or 81% of generation time
Pupal stage 113 degree days or 10% of generational time
Navel Orange Worm - New Almond Nuts
Generation Time 750 degree days
Biofix to egg hatch 99 degree days or 13% of the generation time
Larval stage 538 degree days or 72% of generation time
Pupal stage 113 degree days or 15% of generational time
Navel Orange Worm - Pistachios
Generation Time 835 degree days
Biofix to egg hatch 99 degree days or 12% of the generation time
Larval stage 623 degree days or 75% of generation time
Pupal stage 113 degree days or 13% of generational time
Navel Orange Worm spends an average of 76% of their time eating as a larvae and inside the nut shielded from any pesticide sprays.
The other 3 common insect pest spend just 44% of their time eating.
No wonder this is such a difficult insect to control with pesticide sprays and why winter sanitation remains the number one option in management of this insect pest.
California Ag Supply
Tel: 559-221-7954
E-mail - Info@californiaagsupply.com