Crop spraying
Farmer's Weekly|January 21, 2022
The knapsack sprayer is ideal for controlling small outbreaks of pests, as it’s economical, can be applied quickly, and is very accurate, says Bill Kerr.
Bill Kerr

With spraying technology becoming ever more sophisticated, the humble knapsack sprayer tends to be used less and less frequently. Yet this device is ideal for many applications.

For example, many tomato farmers who encounter a patch of red spider mites on their land haul out their large mechanised rigs and spray the entire land. Yet it’s often far easier and cheaper to use the simple knapsack sprayer to spray the patches with a little overlap.

As a tomato grower, you might reason that a patch of spider mite in one location means that the pest will be present elsewhere on the land and this justifies spraying the entire land. You should bear in mind, though, that most agricultural pests in South Africa have natural enemies, and by spraying the whole land you can end up eliminating the insects that can control the pest.

Continue reading your story on the app

Continue reading your story in the magazine

MORE STORIES FROM FARMER'S WEEKLYView All

'Agriculture Is a Journey, Not a Race'

Achmad Brinkhuis was named the Agricultural Writers SA's New Entrant for Farming in 2021. He spoke to Lindi Botha about his egg and vegetable operation, and the challenges and opportunities facing his business.

8 mins read
Farmer's Weekly
May 27 2022

Read this before growing tomatoes

Tomato production can be highly profitable, but you need to choose your tomato type and cultivar with care, says Bill Kerr.

2 mins read
Farmer's Weekly
May 27 2022

Moving South Africa's apple industry forward

Cape Sweet Nursery is revolutionising the production of apple plant material on dwarfing rootstocks. Farmer Retief du Toit and ZZ2 production manager Hendrik Pohl spoke to Glenneis Kriel about their work.

6 mins read
Farmer's Weekly
May 27 2022

Tips for small-scale poultry producers

Gladys 'Nana' Towbola of Peezel Farms not only farms broilers and layers, but is passionate about uplifting other small-scale growers through regular workshops. She spoke to Susan Marais about what it takes to start and run a small poultry farm.

7 mins read
Farmer's Weekly
May 27 2022

Hertzogville Show 2022

The Hertzogville Show was held on 11 and 12 March. There were six cattle breeds and 145 cattle on show, and champions were crowned in each category.

1 min read
Farmer's Weekly
May 27 2022

Give buchu a go!

Approximately 80% of buchu essential oils are used in the food and flavour industry to enhance fruit flavours.

4 mins read
Farmer's Weekly
May 27 2022

Fighter ace, aviation pioneer, bold leader: the remarkable career of Quintin Brand

Quintin Brand had extraordinary flying skills, and put them to full use as a fighter ace and a record-breaking London-to-Cape Town pilot. He was also a superb strategist during the Battle of Britain.

4 mins read
Farmer's Weekly
May 27 2022

An innovative new harvesting tool

Enter the PickLogger, a new harvesting tool developed by Agri Technovation, that allows for more accurate yield management.

3 mins read
Farmer's Weekly
May 27 2022

Energy storage can enhance SA agriculture

Energy-related challenges pose a significant obstacle to the agriculture sector's continued growth in South Africa, says Abe Cambridge, founder, and CEO of The Sun Exchange, which specializes in solar-energy projects.

5 mins read
Farmer's Weekly
May 27 2022

Rabies cases still on the rise in South Africa

Due to people in farming communities keeping higher numbers of dogs, rabies is more prevalent in rural areas.

2 mins read
Farmer's Weekly
May 13, 2022
RELATED STORIES

How to Do Law Roach Like Law Roach Does Law Roach

It's safe to say the Legendary judge and very A-list stylist (see: every Zendaya red carpet appearance) has truly impeccable vibes. Here's how to snag a little of that magic for yourself.

1 min read
Cosmopolitan
Issue 03, 2022

5 WAYS TO FIGHT FATIGUE

KEEPING THE PEP IN YOUR STEP ISN'T AS COMPLICATED AS YOU THINK

1 min read
Closer US
March 28, 2022

HR Tech Helps SMBs Navigate the “Great Resignation

As the employer-employee paradigm goes through a period of turbulent change, HR technology provides a lifeline for small and midsize businesses

3 mins read
Inc.
March - April 2022

UN, US OFFICIALS URGE ACTION TO AVERT CLIMATE DISASTER

The U.N.’s top human rights official and U.S. President Joe Biden’s climate envoy called Thursday for countries to step up the fight against global warming, describing it as an issue of sheer survival for humankind.

3 mins read
Techlife News
October 30, 2021

CUOMO CAUGHT UP IN HEATING SCANDAL!

TV chef Sandra Lee moved 3,000 miles away from governor

3 mins read
Globe
May 03, 2021

IN ‘HAPPILY,' 10 MILLENNIALS WALK INTO AN AIRBNB....

Their friends are annoyed — and not just because the bathroom is tied up. They’re annoyed because this honeymoon phase has lasted 14 years and shows no sign of abating.

3 mins read
AppleMagazine
AppleMagazine #491

ANTI-VAXXER BOBBY RIPS KENNEDYS APART!

Crusade against COVID jab ignites ugly family feud

2 mins read
Globe
January 25, 2021

NO EXCUSE FOR IGNORANCE

Are You a Bystander or “By-Doer?” Kerry Davis of Dark Angel Medical Empowers Others to Intervene With the Training That Can Make the Difference in Matters of Life or Death

10+ mins read
OFFGRID
Issue 40

Defensive line fulfills high expectations

It was the tip of the spear followed by the old guard. Washington’s defensive line lived up to expectations in its opener against Philadelphia. After the team allowed a quick 17 points, it shut down the Eagles the rest of the game while creating two interceptions for eventual touchdowns in the 27-17 victory.

3 mins read
Warpath
October 2020

Dominic Chambers

Magical Realism

10+ mins read
JUXTAPOZ
Fall 2020