Scientific name Laphygma exigua Hubner Lepidoptera, Noctuidae. Alias ​​Spodoptera. The distribution ranges from Heilongjiang in the north, to Guangdong and Guangxi in the south, and from the coastal provinces in the east to Shaanxi, Sichuan, and Yunnan in the west. The host has more than 170 kinds of vegetables such as sugar beet, cotton, sesame, corn, hemp, tobacco, green pepper, eggplant, potato, cucumber, zucchini, cowpea, legume, fennel, carrot, celery, spinach, leeks and other vegetables. Injury features: Newly-incubated larvae colonize the leaf's back, spine the nets, feed on the mesophylls inside, leaving the epidermis and clear pores. After 3rd age, the leaves can be eaten as holes or nicks. In severe cases, only leaves veins and petioles can cause death of the sugar beet seedlings, resulting in the lack of seedlings and ridges, or even the destruction of seedlings. Reduce sugar beet and reduce quality. Living habits Beijing, Shaanxi, 4-5 generations, Shandong 5 generations, Hubei 5-6 generations, Jiangxi 6-7 generations, overlapping generations. In Jiangsu, Henan, and Shandong, the earthworms lived in the soil in winter. In Jiangxi and Hunan, the earthworms in the soil and a few young larvae lived in the weeds and in the earth seams. In winter, they still saw a small amount of feeding. In the subtropical and tropical regions, there can be no annual overheating and dormancy. The insects of the genus Insect which are intermittently fleas are different in different years. In recent years, the damage of the worms has been on the rise. For other habits, see this book Cotton Pest - Beet Armyworm. Prevention methods (1) Ploughing beet fields in the late autumn and early winter can eliminate some of the overwintering earthworms. Weeding in March-April in spring eliminates the first instar larvae on weeds. (2) The egg masses were prolific in the back of the leaves, with loose villi covering, easy to find, and 1, 2 instar larvae were concentrated on the spawning leaves or nearby leaves, combined with field operations to remove egg masses and kill young larvae. (3) Spray 90% crystal trichlorfon 1000 times or 20% cypermethrin Emulsion 20 before the third instar. o Diluent, 5% Suppository EC 3500x; 20% Erzhi No. 1 Slurry 1000x, 44% Sac Emulsion 1500x, 2.5% Emulsion 2000x, 50% Sin Phosphorus EC 1500 times. (4) Advocate the use of biological control methods, spraying with a spore of more than 100 million spores of acaricidal bacteria or 500-700 times. (5) Preparation method and usage of Spodoptera exigua extrinsic hormone See cotton pest insect Spodoptera litura control method.
In biology, folliculogenesis is the maturation of the ovarian follicle, a densely packed shell of somatic cells that contains an immature oocyte. Folliculogenesis describes the progression of a number of small primordial follicles into large preovulatory follicles that occurs in part during the menstrual cycle.
Estrogen levels peak towards the end of the follicular phase. This causes a surge in levels of luteinizing hormone (LH) and follicle-stimulating hormone (FSH). This lasts from 24 to 36 hours, and results in the rupture of
the ovarian follicles, causing the oocyte to be released from the ovary.
We have Pregnant Mare Serum Gonadotropin (PMSG) Injection and Luteinizine Hormone-Realeasing Hormone A3 (LHRH A3) to help farmers to solve breeding problems in this phase.
Folliculogenesis and Ovulation Folliculogenesis and Ovulation,Pregnant Mare Serum Gonadotropin,Veterinary Medicine Ovulation Injection,Pregnant Mare Serum Gonadotropin Jiangxi Institute of Biological Products Inc. , https://www.jxinstitute.com
Morphological characteristics Adult body length 8-10mm, wingspan 19-25mm. Gray-brown, black spots on the head and chest. The forewings are gray-brown, with double lines on the anterior segment of the baseline; the internal lines are black and wavy; the sword pattern is a black strip; the ring pattern is yellowish and black; the renal pattern is pink, the central brown, and black; The horizontal line is black and wavy; the outer horizontal line is black and black, zigzag, with white lines between the front and rear ends; the white line is submarine, zigzag, with black dots on both sides, and there is a large black on the outer side at M1. Point; edge line is a list of black spots, the inside of each point is lined with white. The hind wings are white, and the veins and edges are dark brown. Ovoid globose, white, lumps produced on foliar or leafy back, 8-100 grains ranging from 1 to 3 layers, covered with female fluff off white hairs, therefore cannot see eggs directly. The last instar larvae have a body length of about 22mm, and their body color changes greatly from green, dark green, yellow-brown, brown to dark brown, with or without the backline, and the colors are also different. The most obvious feature is that the lower part of the abdomen valve is a clear yellow-white vertical band, sometimes pink, and this band reaches the end of the abdomen and does not bend to the hip. It is an important feature that is different from Brassica napus, after each throttle. There is a clear white point above. The length is 10mm, yellow-brown, and the chest valve protrudes. 