null on All
Quick answer
If your All has null, the most likely cause is: Neem oil contains azadirachtin as primary insecticidal compound, which disrupts insect molting hormone ecdysone, preventing larval development and causing mortality in target pests.
Start here:
- 1. 1. Mix 1-2 teaspoons cold-pressed neem oil per quart of warm water (never boil)
- 2. 2. Add 2-3 drops of mild liquid dish soap as emulsifier to help oil disperse
Why All gets null
Neem oil contains azadirachtin as primary insecticidal compound, which disrupts insect molting hormone ecdysone, preventing larval development and causing mortality in target pests.
How to reverse null on All
- 1
1. Mix 1-2 teaspoons cold-pressed neem oil per quart of warm water (never boil)
- 2
2. Add 2-3 drops of mild liquid dish soap as emulsifier to help oil disperse
- 3
3. Shake vigorously before each application as oil separates quickly
- 4
4. Spray all leaf surfaces (upper and lower), stems, and soil surface
- 5
5. Allow 24-48 hours before evaluating effectiveness; repeat weekly for 3-4 weeks
Keep null off this All
Apply neem oil preventively every 7-14 days during active pest seasons. Rotate with other organic controls to prevent resistance. Always spray in evening to avoid photodegradation of azadirachtin.