Chaffer grubs not a big threat to maize

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How can one control chaffer grubs in maize to stop their destruction?

Chaffer grubs are creamy coloured pests about 1.5cm (0.6 inch) length. The pests are common in the root system of most growing plants. Chaffer beetles lay their eggs on the ground. The eggs later hatch into chaffer grubs, which dig into the soil and come out of the soil later as chaffer beetles.

The chaffer grub is difficult to control using pesticides. But they are controlled naturally by nematodes. The nematodes look for chaffer grubs and attack them by entering through the grubs’ body openings. Once inside the chaffer grub, the nematodes release bacteria that inhibit the chaffer grubs from feeding, in this way eventually killing them. The nematodes reproduce inside the dead chaffer grubs and release more nematodes which also go for other chaffer grubs.

Nematodes control chaffer grubs naturally

 Most farmers do not bother with chaffer grubs because they are controlled by nematodes naturally. You will notice that chaffer grubs never last long in the affected shamba. They therefore cause very little damage to crops. Farmers should ignore chaffer grubs as the damage they cause is not much compared to other pests. If the destruction of the maize is widespread, it is important to check if there are other pests responsible for the problem and take preventive measures such as spraying with plant extracts or related biopesticides.

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