Those products most welcomed in 2020

—NPV series, Mamestra brassicae NPV and Helicoverpa armigera NPV

—Paecilomyces lilacinus to kill nematodes

—Tea Saponin using as Molluscicide

—Metarhizium anisopliae, Beauveria bassiana and Celangulin as insecticides

—Trichoderma harzianum and Bacillus subtilis as fungicides

—γ-PGA & Chitosan/Chitosan Oligosaccharide for promoting rooting, germination and growth.

Promote growth by Chitosan oligosaccharide

Indoleacetic acid is a very important growth hormone in plants, which is closely related to root development.

The application of chitooligosaccharides can induce the increase of secretion of plant growth hormones such as indoleacetic acid in plants.

The results of the study showed that after using Chitosan oligosaccharide, plant endogenous hormones such as indoleacetic acid and gibberellic acid reached the highest levels within 8 hours.

HUANGLONGBING

Life form: Bacterium

Origin: Asia and Africa 

Distribution: Varies, depending on the species

Features: Yellowing, blotchy mottling and unseasonal leaf  flushing, leaf drop, dieback of branches .

Pathways: Imported plant propagative material, infected insects

At risk: Commercial citrus varieties & relatives

Huanglongbing (yellow dragon disease), previously known as citrus greening disease, is one of the worst diseases of citrus trees worldwide. It is caused by the bacterial disease Candidatus Liberibacter asiaticus that spreads through the tree canopy, causing decline and then death of the tree.

There is no cure – the only way to stop the disease is to destroy all infected trees and replace them.

The disease huanglongbing originated from China, with its vectors from Asia (Asiatic citrus psyllid) and Africa (African citrus psyllid). Depending on the species, the disease and its vectors can now be found throughout:

  • North, Central and South America
  • South East Asia, including Indonesia and East Timor
  • Papua New Guinea.

The islands of Torres Strait provide a potential pathway for the movement of serious pests into Australia, such as huanglongbing and the Asian citrus psyllid, present in countries to our north.

How to identify Huanglongbing (Candidatus Liberibacter asiaticus)

Everyone needs to keep an eye out for symptoms of huanglongbing.

Huanglongbing is spread by the movement of infected plants and plant propagative material and by sap sucking insects. These insects – the Asiatic citrus psyllid (Diaphorina citri) and African citrus psyllid (Trioza erytreae) – are not present in Australia and are of major concern due to their ability to spread huanglongbing.

  • Adults of the Asiatic citrus psyllid are 3-4 millimeters long with brown markings on the wings. When feeding on the veins of the young leaves, they adopt a ‘head-down, tail-up’ position.
  • Juvenile psyllids are yellow and commonly found feeding on young, soft shoots.

The African citrus psyllid is similar but larger with a light brown-grey body and black head, and large transparent forewings.

Psyllids

Psyllids

Huanglongbing causes yellowing of citrus plant leaves and in some instances deformed, sour and bitter fruit.

  • Symptoms on leaves are subtle and hard to pick but one key sign is a blotchy yellowing that is not symmetrical or mirrored on both sides of the leaf.
  • Later, new young leaves are small, upright and yellow, with green bands around the veins.

In well-managed orchards, a yellowing that spreads slowly over the tree and through an orchard is an easily seen sign. The spreading yellowing effect can be especially hard to see in neglected backyard citrus trees growing in poor soils.

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Infected trees have a blotchy yellowing that is not symmetrical or mirrored on both sides of the leaf Source: DAWR

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Fruit from infected trees can be misshapen or lopsided, and when cut lengthwise, the arrangement of internal tissues may be irregular Source: DAWR

Herbicide efficacy enhancer-Methylation Vegetable oil

Methylation Vegetable oil can improve the spreading area, adhesion and permeability of droplets on the surface of the crop, and promote the absorption and conduction in crop.

Besides, the methylated vegetable oil can prevent the liquid droplets from drying too fast, thereby enhancing the absorption of droplets through pores and the stratum corneum, and enhances efficacy for herbicides.

Tea Saponin-natural extract

Tea Saponin, a glycoside compound extracted from camellia tea seeds, is excellent natural nonionic active surfactant. It can be widely used in pesticide, cultivation, textile, daily chemicals, arthitectural field, medical field and so on.

Tea saponin is triterpenoid saponin, it tastes bitter and spicy. It stimulates mucous membrane of nose to lead to sneeze. The pure product is fine white column-shape crystalloid with strong moisture absorption ability. It presents apparent acidity to methyl red. It’s easy to be dissolved in water, water-contained methanol, water-contained ethanol, glacial acetic acid, acetic anhydride and pyridine etc. Its melting point: 224.

CAS NO.: 8047-15-2

MOLECULAR FORMULATE: C57H90O26

Content: 60%-65% 

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DMU – Dimethylolurea

Chemical name : N,N’-Dimethylolurea
Formula : C3H8N2O3
Molecular Weight : 120.1
CAS No. : 140-95-4

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Dimethylolurea is used to treat textiles and wood, and is mixed with fillers for use in molding adhesives. And used in disinfectants and other biocidal products, as an in-can preservative, as a preservative for liquid-cooling and processing systems, and as a slimicide. Dimethylolurea is also used as a preservative in metal-working fluids, as a developer of photographic film, and as a cleaning agent and disinfectant.

Mepiquat chloride for cotton

Mepiquat chloride and mepiquat pentaborate both contain mepiquat which is an anti-gibberellin growth retardant that reduces plant cell enlargement to help balance vegetative and reproductive growth.

When applied to cotton, it can help control rank growth by reducing stem elongation at newly formed internodes.

The application of PGRs can help increase fruit retention and promote earlier maturity, reducing the crop’s risk of late-season insect damage, boll rots, and harvest losses.

Mepiquat applications have been linked to increased cotton yield potential when applied at the optimum rate and timing for the variety and field planted.