Sugarcane

Scientific name Tryporyza nivella Fabricius Synonyms Scirpophaga nivella Fabricius. Is a lepidoptera, codling moth family. Alias ​​Yellowtail. It is mainly distributed in the cane areas of South China and Taiwan. In addition, the white locust that damages sugarcane in China and T.intacta (Snellen) are called red-tailed peony and T. auriflua (Zellen) are called cane stems.

Host sugar cane, Mao and so on.

Injury characteristics Newly hatched larvae invade the sugarcane plant from the heart leaves, and horizontal holes appear when the heart leaves are unfolded, which damages the growth point of adult plants and promotes the germination of lateral buds, forming a broom-like “sweeping cane” and withering on the tip. Some of them are harmful to the stem section.

Morphological characteristics Female adult moth body 13-15mm, wingspan 25mm, male moth slightly smaller. Pure white, shiny, with triangular wings, long and pointed top, female moth end with bright golden tail hair, abdomen with yellow. The egg is 1.3mm long, flat oval, light yellow, later orange, egg oval, covering the orange yellow hair. The last instar larvae have a body length of 20 to 30mm. The body of the larvae is hypertrophic, milky-yellow, with horizontal wrinkles. The prosthodontic plate is light orange and yellow, and the chest and feet are short and the gastropods are degraded. The cockroach is 14-18mm long, milky-yellow, silvery-white at the time of hatching, and slightly rounded at the end of abdomen.

Life habits Guangdong, Taiwan 4 to 5 generations old, 5 generations in Hainan, the old mature larvae in the cane plant tip overwintering. Guangdong had five peaks of damage in early April, late June, late July, early September, and late October. Taiwan has two main damage peaks during the period of young cane and fall of October-December, and March-April of the following year. The insects are eclipsed and have phototaxis. Many eggs are produced on the back of cane seedlings. The newly hatched larvae are lively and active, and often drooping silk puffs are scattered by the wind. In general, there is one larva per plant, which has entered the base of the unfolded heart, and has been stricken downwards. After the heart is opened, it shows a grazing hole. When the larvae grow older, they become the growth point. Withered seedlings and broom cane. The old mature larvae pupate in the cane stalks and break out of the crickets as they emerge. The generally high potential difference of sugarcane fields is vulnerable. In Taiwan, Taiwan’s Sugar 134 and Cane 4 were heavy.

Control methods (1) Planting selection 3 and other insect-resistant varieties. (2) For other methods, see Sugar Cane Two Points.

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