How to diagnose vegetable injury

The wide application of various pesticides in vegetable production has played a very important role for the vegetable farmers to obtain high benefits, but the occurrence of phytotoxicity is not uncommon, which also brings some unnecessary losses for vegetable farmers. Therefore, grasping the types and symptoms of crop phytotoxicity and taking timely preventive and control measures are problems that cannot be ignored in the safe use of pesticides.

After consulting the relevant experts, the author summarized the following three types of crop injury.

Residue-type phytotoxicity This phytotoxicity is characterized by no phytotoxicity in the current season crop after spraying, and the residual pesticides in the soil cause phytotoxicity to crops that are more sensitive to mandibles. For example, the use of Simazine herbicide in corn fields often causes phytotoxicity to crops such as sorghum and beans. This kind of phytotoxicity occurs mostly in the germination stage of the seed crops of the lower pods, lighter root tips, bud tops and other parts become brown or rot, affecting normal growth; severe rot and poor shoots, reduce the emergence rate or no seedling emergence. This kind of phytotoxicity is difficult to diagnose, and it is easy to be confused with fertilizers. Can be used to understand the cultivation and management of the former crops, pesticide use history, soil testing and other measures to prevent misdiagnosis and cause losses.

The symptoms of chronic-type phytotoxicity do not show up immediately after the application of the phytotoxicity, and have certain latent potential, so that the growth of the crop is hindered, and the flavor of the fruit deteriorates. This phytotoxicity is often difficult to diagnose and is easily confused with other physiological diseases. When the diagnosis is made, diagnosis can be made by understanding the occurrence of pests and diseases, the type, amount, area of ​​application, and method of plant control.

The acute-type phytotoxicity has the characteristics of rapid occurrence and obvious symptoms. Generally, the symptoms appear within a few hours to several days after the application. The general appearance is that the crop leaves have spots, perforation, anxiousness, curling, deformity, and withered. , yellow, green or white. The roots suffer from short and thick roots, few root hairs, yellow or thick roots, brittleness, and rot. Seed victims are unable to germinate or germinate slowly. Plants suffer from falling flowers, falling buds, malformed, smaller, spotted, brown fruit, rust, and fruit drop. This kind of phytotoxicity is mostly caused by improper use of pesticides or improper use of pesticides for seed treatment.

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Production Specification Sheet

Product Name

Goji Berry

Country of Origin

Ningxia in China

 

ANALYSIS

DESCRIPTION

TEST METHODS

Product Name

Conventional Goji Berry

Organic Goji Berry

Form

Spindle and slightly shrinks   

SN/T 0878

Color

Bright red or purplish red

SN/T 0878

Taste and Smell

Characteristic

SN/T 0878

Size

280granule/50gram
380granule/50gram
500 granule/50gram

160granule/50gram
220granule/50gram
Ungraded

SN/T 0878

Total bacterial count, cfu/ml

≤100000

GB4789.2

Salmonella

Absence

GB/T 4789.4

SO2

NMT 30

SN/T 0878

Moisture, %

NMT13

GB/T 5009.3

Pb, mg/kg

NMT 2.0

GB/T 5009.12

As, mg/kg

NMT 1.0

GB/T 5009.11

Cu, mg/kg

NMT 10.0

GB/T 5009.13

Pesticide Residue

Acetamiprid <0.2PPM;

Imidacloprid<0.2PPM;

Fenvalerate<0.1PPM;

Cypermethrin<0.1ppm

negligible with other pesticides

Negative

GB/T 19648-2006,

GB/T 200769-2008

 

Shelf life

12 months months if stored in a cool ventilated dry place

Package

4.54Kg/Bag, 4Bags/ Carton (10Pounds/bag,4bags/Carton);

5KG/Bag,4Bags/Carton

Storage

It should be stored under the dry and ventilated environment  in original bag, the temperature no more than 20 ℃

Conventional Goji Berry

Conventional Goji Berry,Conventional Goji,Conventional Dried Goji Berries,Conventional Wolfberry

Ningxia Wolfberry Goji Industry Co.,ltd , https://www.nx-wolfberry.com