Ganoderma lucidum pest: slug

Slug (SLuge) alias water, slug, etc. Belong to mollusc phylum, gastropod, handle eye, slug family. Agrioli-naxagrestis Linnaeus, Phiolomyces bilimeatus Benson and Limax flavus Linnaeus were the main harmful fungi.

1. morphology and habit

(1)Wild slugs are soft without shell, dark gray, yellow-white or gray-yellow red, and a few have obvious dark bands or spots. Two pairs of tentacles, black. The mantle is 1/3 of the body length, the edge is rolled up, and there is a degenerated shell shield plate inside, secreting colorless mucus. When stretched, it is 30- 40mm long and 4- 6mm wide.

(2)The mantle covers the entire back, exposing only the tips of the feet. Gray or fawn body, back and both sides have a vertical band composed of black spots. The front end of the body is wide and the rear end is narrow. The tail is ridged. The antennae are blue-brown. White feet. The mucus is milky white. Breathing pores round, located 3 mm from antenna. When stretched, it is 120mm long and 12mm wide.

(3)Yellow slugs are naked, soft and without shells. Dark orange or tan with scattered pale yellow or white spots. The foot is pale yellow. Secretes yellowish mucus. Antennas pale blue. There is an elliptical mantle in the anterior 1/3 of the dorsum. When stretched, it can reach 120 mm and 12 mm wide.

No matter which kind of slug its common living habits are, hiding in the dark and damp grass, branches and leaves, stones, etc. during the day, and going out at night to do harm. They eat a variety of foods. One generation a year. The optimum activity temperature is 15-25℃.

2. Insect condition feed bud and fruiting body young part, make it become notch or jagged, lose commodity value. Slug crawling through the fruiting body, often leaving a white sticky band marks, affecting product quality.

3. control methods

(1)Remove weeds, dead leaves, stones, etc. from the cultivation field and its surroundings, so that slugs have no hiding place. Sprinkle lime powder on the ground or spray 0.3%-0.5% sodium pentachlorophenol.

(2)Slug use of the day out of the night, sunny out of the habit of rain, artificial hunting.

(3)Spraying 5% coal-phenol soap solution at the places where slugs often enter and exit has a good control effect.

(4)Calcium arsenate mixed with cake powder (1:10) to make poison bait, scattered near the site in the evening.