Cannabis flower
August 11, 2024
![]()
The scientific name is Mordellistena cannabisi Matsμmura Coleoptera. Located in the northwestern area of Ningxia, it is an important pest of cannabis in the Yinchuan Plain. Host marijuana, cocklebur.
The characteristics of larvae are as follows: larvae feed on tender stems and tips, and the affected part grows in a bug-like manner, which not only reduces quality but also affects yield.
Morphological characteristics Adult body about 3mm in length, body black, body surface dense gray short hair, head bent, ventral curved bow. The hind legs are enlarged, jump well, and the tarsal is longer than the tarsal. The female worm has a long ovipositor at the end. The larvae are about 6 mm long and waxy yellow, and the thoracic foot is extremely short and small and has no abdominal foot. The sides of the abdomen of the 1-8 section expand outwards, the conical end of the abdomen is curved upward, and the distal end is bifurcated. About 3mm long, the head and chest are red-brown and yellow on the abdomen.
Life habits 1 generation in Ningxia, larvae wintering in the stems, hemp roots, and sometimes mixed with Maize larvae damage, the following spring phlegm,; June feathered into adults. Adults like to move on umbelliferous plants such as fennel and carrot.
Control methods (1) Immediately after harvest, marijuana plows, picks up roots, and requires it to be burned before adult emergence in May of the following year. (2) When adults are found gathering on flowers of umbelliferae, such as carrots or fennel, spray 2.5% trichlorfon powder or 2% Badan powder, and 2.5% phoxim powder every 667m 22 kg. 80% dichlorvos emulsion 1000 times.
