Protecting Apples with Bordeaux Mix Quiz

Explore essential strategies and considerations for managing apple diseases using Bordeaux Mix in horticulture. Learn about timing, preparation, and application methods for healthier orchards.

1. Purpose of Bordeaux Mix in Apple Orchards

   What is the primary reason for applying Bordeaux Mix in apple orchards during early spring?

   1. Boosting fruit sugar content
   2. Repelling insect pests directly
   3. Enhancing tree growth hormones
   4. Preventing fungal diseases such as apple scab

   Explanation: Bordeaux Mix is mostly used to prevent fungal diseases in apples, especially apple scab, which can damage leaves and fruit. It is not designed to increase sugar content or enhance growth hormones, and its effect against insect pests is indirect and minimal.

2. Key Ingredients in Bordeaux Mix

   Which two main ingredients are combined to prepare a traditional Bordeaux Mix for apples?

   1. Boric acid and neem oil
   2. Potassium nitrate and sulfur
   3. Copper sulfate and lime
   4. Magnesium sulfate and urea

   Explanation: Traditional Bordeaux Mix is made by mixing copper sulfate with lime, which reduces copper toxicity and ensures safe plant application. The other options list unrelated or incomplete ingredient combinations.

3. Correct Timing for Application

   When is the most effective time to apply Bordeaux Mix to prevent primary infections on apples?

   1. Before bud break in early spring
   2. Immediately after heavy rain in midsummer
   3. During peak fruit harvest
   4. In late autumn after all leaves fall

   Explanation: Applying Bordeaux Mix before bud break protects emerging buds from early-season fungal infections. Spraying during harvest or after leaf fall is ineffective, and applying right after summer rains does not align with disease cycles.

4. Mixing Bordeaux Solution Safely

   Which safety step should be followed when preparing Bordeaux Mix for orchard use?

   1. Add copper sulfate and lime to water separately, never together
   2. Store mixed solution for several weeks before use
   3. Mix with hot water to increase solubility
   4. Apply the solution undiluted for better results

   Explanation: Adding copper sulfate and lime separately to water prevents hazardous reactions and ensures proper mixing. Using hot water or undiluted solution can damage plants, and Bordeaux Mix should be used promptly, not stored for weeks.

5. Environmental Considerations

   Why should the use of Bordeaux Mix on apples be limited, especially near water sources?

   1. It attracts more pollinating insects
   2. It accelerates fruit ripening too quickly
   3. It causes increased fruit drop
   4. Copper can accumulate in soil and affect aquatic life

   Explanation: Excessive use of copper in Bordeaux Mix can lead to soil accumulation and potential runoff, harming aquatic organisms. The mix does not cause fruit drop, attract pollinators, or impact fruit ripening speed.