Citrus flower buds (pictured)

Distribution and hazard symptoms:
The worm, also known as the orange bud fly, belongs to the Diptera Melioididae. There are all citrus areas in China that only harm citrus. When the buds are 2-3 mm in diameter, the eggs are produced in the buds from the top of the buds, and the larvae eat the flowers to make them yellowish-white and spherical.

Morphological characteristics:
Female adults are 1.5-1.8 mm in length and 2.4 mm in wingspan. Dark brown, dark brown hair around the body. The head is compound and black. The wing fins are transparent and covered with fine hair. They have metallic flashes under strong light and their wings are simple. The antennae are rosary-shaped for 14 knots, and most of them have two sets of radial bristles per section. The male is slightly smaller and its antennae are dumbbell-shaped yellow-brown. The egg is long, oval and colorless and transparent, about 0.16 mm long. The larvae are long, spindle-shaped, orange-yellow, about 3 mm old, and have a yellow-brown "squatting" sword blade on the ventral surface of the chest.蛹 yellow-brown spindle, about 1.6 mm long.

Citrus flower budsCitrus flower buds

Living habits:
Two generations of 1 generation in 1 year, larvae winter in the soil. When the orange emerges, the adult eclosion emerges, and the newly emerged adult crawls to the proper position on the ground and then lurks on the ground during the day, during the night activities and spawning. Bud diameter 2-3 mm, the top of the most suitable for spawning loose eggs, eggs produced around the ovary, the larvae eat flowers to make petals thicker, filaments anther brown, and produce a lot of mucus to enhance its adaptability to the dry environment. The larvae lived in buds for about 10 days and climbed out of the flower buds into the soil to get through the winter. The rain is favorable for the emergence of adults and larvae into the soil, so the low-lying orchard, orchard and shade orchard, sand and sandy loam are conducive to the occurrence.

Control methods:
The key is to spray the ground when the adult is unearthed. When the buds are 2-3 mm in diameter, use 50% phoxim or 20% methylisotriphos 1000-2000 times solution, 20% methidone or 2.5% bromine Cypermethrin 3000-4000 times, 90% trichlorfon or 80% dichlorvos 800-1000 times, 3% methyl 1605 powder 22 kg/ha spray the ground, spray once or twice a day for 7-10 days . Before the larvae were removed from the soil, the affected flower buds were boiled or buried deeply; in winter and spring, the ploughing soil was used to kill some of the larvae.

PGA is a water soluble, biodegradable, non-toxic biopolymer produced by microbial fermentation. PGA is a sticky material first found in "natto", a fermented soybean. PGA is an unusual anionic, naturally occurring homo polyamide that is made of D & L glutamic acid units connected by amide linkages between alpha amino & gamma carboxylic acid groups.
Gamma-poly-glutamic acid (gamma-PGA) is a natural occurring, multi-functional, and biodegradable biopolymer.

It is produced through fermentation by Bacillus subtilis using glutamic acid. PGA is consists of glutamic acid monomers crosslinked between α-amino and γ-carboxyl groups, and the molecular weight of PGA is usually between 100~1000 kDa. It is water-soluble, edible and non-toxictowards human, and is environment friendly. It has broad applications in the fields of medicine, food, cosmetics, and water treatment.


CAS No.:


Other Names:

Polyglutamic Acid

Grade Standard:

Food Grade, Cosmetic Grade, Agricultural Grade


Animal Pharmaceuticals




White Powder

Product Name:

Polyglutamic Acid



Shelf life:

2 Years


Poly-γ-glutamic Acid

Poly Y Glutamic Acid,Poly Gama Glutamic Acid,High Purity Polyglutamic Acid,Glutamic Acid Production

Qufu Hi-Tech Trading Co., Ltd. ,