Custard Apple Pest Control: Stop Fruit Drop with Neem & Verticillium Spray

A specific type of pest infestation on custard apple — and other related fruits — causes them to drop prematurely before they fully ripen. If left uncontrolled, this leads to significant crop loss. The good news is that this problem can be effectively managed using a two-step spray program involving a neem-based botanical product and a Verticillium-based biological solution, applied on consecutive evenings and repeated after 10 days.

Pest infestation on custard apple fruit causing premature drop

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🌿 Step 1: Neem-Based Spray (Day 1 Evening)

On the first evening, prepare and apply a neem-based botanical spray as follows:

✅ Dilute a neem-based botanical product with a non-ionic adjuvant in water at a ratio of 1 ml per 4 liters of water.
✅ Add 1 ml of non-ionic adjuvant to every 4 liters of spray solution.
✅ Spray to thoroughly drench the fruits, the undersides of leaves, and the clusters.

💡 Tip: Make sure the spray reaches the undersides of leaves and fruit clusters — these are the areas where pests tend to shelter and feed, making them the most critical zones to cover.

🧪 Step 2: Verticillium or Biological Spray (Next Evening)

On the following evening, apply one of the two biological solutions below. The goal is to ensure the fruits, kusurthikal, and tender parts get thoroughly wet:

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Option A — Verticillium Solution

Mix 30 grams of Verticillium in 1 liter of water. Allow it to settle, then use only the clear liquid from the top for spraying.

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Option B — 15 ml Solution

Mix 15 ml of the product in 1 liter of water and spray directly so that the target parts are fully drenched.

⚠️ Important: For both options, add 1 ml of non-ionic adjuvant per 4 liters of spray solution to improve coverage and effectiveness.

🔁 Spray Schedule & Repeat Application

Farmer spraying neem-based solution on custard apple trees to control pest infestation

Follow this simple two-evening spray cycle and repeat the full program after 10 days for continued protection:

📅 Evening 1: Neem-based botanical spray with non-ionic adjuvant (1 ml per 4 liters)
📅 Evening 2: Verticillium clear liquid (30g/liter) or 15 ml solution (per liter) with non-ionic adjuvant
🔄 Repeat: Entire two-evening program after 10 days

🌙 Why spray in the evening? Evening application reduces evaporation, ensures better absorption, and avoids harming beneficial insects that are active during the day.

❓ FAQ

What type of pest causes custard apple fruits to drop prematurely?

A specific pest infestation — visible on the fruit surface and clusters — is responsible for causing custard apple fruits to drop before they ripen fully. This type of infestation also affects other related fruits. Early identification and timely spray intervention are key to preventing significant crop loss.

How do you mix the neem-based spray for custard apple pest control?

Dilute the neem-based botanical product at a ratio of 1 ml per 4 liters of water. Add 1 ml of non-ionic adjuvant to every 4 liters of the prepared spray solution. Spray thoroughly on fruits, undersides of leaves, and clusters during the evening for best results.

What is the role of Verticillium in custard apple pest management?

Verticillium is used as a biological control agent. Mix 30 grams in 1 liter of water, let it settle, and then use only the clear liquid at the top for spraying. It is applied the evening after the neem-based spray and helps target pests on fruits, kusurthikal, and tender plant parts.

Why is a non-ionic adjuvant added to the spray solution?

A non-ionic adjuvant is added at 1 ml per 4 liters of spray solution to improve the spread and adhesion of the active ingredients on the plant surface. This ensures better coverage across the fruits, leaf undersides, clusters, and tender parts, making the spray more effective against pest infestations.

How often should the pest control spray be repeated on custard apple trees?

The full two-evening spray program — neem-based spray on day one and Verticillium or 15 ml solution on day two — should be repeated after 10 days. This repeat application ensures any newly active pest populations are also effectively controlled before further fruit drop can occur.

Why should custard apple pest sprays be applied in the evening?

Evening application is recommended because it reduces rapid evaporation of the spray solution, allowing better absorption by the plant. It also minimizes harm to beneficial insects such as bees and predatory bugs that are active during daylight hours, making the treatment safer and more targeted.

Can this pest spray method be used on fruits other than custard apple?

Yes. The article specifically mentions that this type of pest infestation affects custard apple and other fruits as well. The same neem-based and Verticillium-based spray program can be adapted for related fruit crops that face similar pest-related premature fruit drop problems.