Question

base on the manual give the pre-operational procedure before using the
knapsack

Answer 1

Answer:

The most commonly used knapsack sprayers are the so-called ‘lever-operated  knapsack sprayers’. When using a knapsack sprayer, be sure to follow these steps:

• Step 1. Read the manual carefully before using the sprayer.
• Step 2. Before herbicide application, test with water to make sure the knapsack sprayer  is functioning properly and has no leaks.
• Step 3. Select the right nozzle. The nozzle is the part from which the herbicide spray  comes out. The type of nozzle determines how much spray comes out and  what the size of the spray is.
• Step 4. Calibrate the sprayer once every 3 months using clean water and a bucket.

Explanation:

Spraying herbicides

Prepare the sprayer and do the spraying following these steps:

Step 1. Fill the knapsack sprayer with water (e.g. 10 L).

Step 2. Add the herbicide (e.g. 100 or 200 ml).

Note: Always use gloves while adding the herbicide!

Step 3. Close the lid and shake well.

Step 4. Fill the sprayer up with more water (e.g. another 5 L) until it is full.

Step 5. Spray the weeds with the herbicide solution. Per hectare it is normal to spray

50–200 L of solution (0.5 to 2 L of herbicide) depending on the number of

weeds. When doing clear-weeding (not normally a good idea!) more herbicide

will be needed (e.g. up to 300 L/ha).

Step 6. Keep clear records of when you have sprayed, and how much.

Step 7. If it rains less than 4 hours after spraying, repeat the treatment (but not if

spraying Gramoxone).

Answer 2

A knapsack sprayer is a piece of farm equipment that is used to spray pesticides etc. on the crops. It consists of a spraying nozzle that is held by hand and connected to a reservoir of spraying solution that is carried on the back like a knapsack, hence the name.

• The solution is the sprayer should not be corrosive in nature. Otherwise, it can eat through the seals, connecting pipe and nozzle and can weaken the knapsack sprayer and render it unfunctional after a while.
• Before filling the sprayer with liquid, one should check the straps to ensure that they are properly fitted. It should sit comfortably on the back, so that one does not suffer from unnecessary back and shoulder ache afterwards.
• The sprayer liquid should not be filled so much that it exceeds the maximum fill mark in the container. This is to ensure that pressure can be sufficiently maintained for smooth spraying.

SPJ2