The pests that harm freesia are mainly oil gourds. Both the adult and larvae of the oil gourd can harm the roots, stems, and leaves of freesia. Adults like to hide in shady, loosely moist soil or thin layers of grass. They come out to feed at night, and are alerted to escape. They spawn in field weeds and in the soil on the edge of haystacks.
Control methods: 1 winter combined with soil to kill overwintering eggs. 2 Put poison bait in the haystack to trap and kill adult worms. The bait is usually made of 5 kg of wheat bran, rice bran and sorghum. After frying yellow, mix 90% of trichlorfon 1000 times 1000 to 2000 ml, or 50% of octane Phosphorus 1000 times 1000 ~ 2000 ml, and then mix in fresh grass on the oil gourd often haunted and hide the place to seduce.
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