Symptom Identification and Control Methods for Chinese Bayberry Pests
May and June are the season when Chinese bayberry ripens and is harvested. Harvesting Chinese bayberry at the right time and promptly doing a good job of storage and freshness preservation are an important part of improving economic returns. The following introduces the harvesting and storage techniques for Chinese bayberry: determining the suitable harvest time for Chinese bayberry. The ripening period of Chinese bayberry varies depending on the production area and variety; the earliest to ripen does so in April, ...
The main pests harming Chinese bayberry trees include pine caterpillars, bagworms and leaf roller moths, etc. They generally hatch larvae in April and May. The following briefly introduces their growth characteristics and control methods:1. Pine caterpillar
Pine caterpillars harm many kinds of forest trees. Their newly hatched larvae gather on new shoots and feed on tender leaves, then after 1 week disperse and continue feeding; in severe cases only the leaf veins remain. Pine caterpillars have 1 generation per year, hatching larvae around early April, and in early to mid-May they spin cocoons on the leaves and pupate.
Control methods: (1) Newly hatched larvae should be caught and killed promptly, or sprayed with 90% trichlorfon 1000-1300 times dilution or 80% dichlorvos 1000-1300 times dilution; (2) adults have strong phototaxis, so light traps can also be used to kill them.
2. Bagworm
Bagworms mainly harm the new shoot leaves of Chinese bayberry. They have 1 generation per year, overwintering as mature larvae inside the protective case, pupating in April of the following year, emerging as adults in early May; females lay eggs inside the protective case, larvae hatch in late May, bite leaves into pieces and join them together to make a new protective case, and begin feeding.
Control methods: during the larval stage, spray with trichlorfon or dichlorvos to kill them.
3. Leaf roller moth
Leaf roller moth larvae harm the leaves of Chinese bayberry, spinning silk to wrap leaves on the tender leaves of new shoots; the larvae roll up inside and feed on the leaf mesophyll, then spin cocoons and pupate.
Control methods: when damage is found, spray 50% fenitrothion 1000 times dilution, or 20% fenvalerate (Sumicidin) 4000 times dilution.