Uses of Zineb

Uses of Zineb

 

Another group of dithiocarbamic acid derivatives with different molecular configurations is Zinc ethylenebisdithiocarbamates. It was developed by Rohm and Haas, Inc. and E.I. du pont and de Nemours Co. in 1943.

 

It is sold in market under different trade names, such as Dithane Z - 78, Hexathane, Indofil Z 78, Lonacol, Paezate C, Kanji, Du Pont Fungicide A etc. Some propriety mixed formulation containing zineb and other fungicides like copper oxy chloride are marketed by some companies. For example Miltox by Sandoz contains zineb and copper oxy chloride.

 

Zineb is soluble in pyridine, but its solubility in water is very less over 10 ppm. It is unstable in the presence of light, heat and moisture. Pure zineb is buff or light coloured but the formulated products like Dithane Z - 78 are yellowish white in colour.

 

It is an excellent, safe, multipurpose foliar and soil fungicide which is used to control various diseases. It is compatible with most of the common fungicides and insecticides. However, it should not be used with any fungicide containing lime.

 

Zineb is toxic to mammals if consumed orally. It may cause irritation to skin, nose and throat. Zineb is phytotoxic is case of zinc sensitive plants. Sometimes it can cause deloliation in vines.

 

Plants like tomato and paddy are able to absorb zinc from zineb. Use of zineb is very useful in those areas where there is deficiency of zinc in the soil. Zineb shows nematicidal properties against meloidogyne spp.

 

Application of Zineb (65 %) at the rate of 1.88 gm per litre water to root system reduces the relative number of Rhizosphere bacteria.

 

As per one report on nitrogen deficiency disease in sugarcane induced by a large number of applications of zineb or maneb to the preceding tomato crop was made by Dubey.

 

In almond, plum and peach, it used against rust disease when sprayed @ 2 gm per litre (0.2 %) at four week intervals from petal fall.

 

As per apple spray schedule issued from department of horticulture, Himachal Pradesh, India through their official website, zineb has been recommended for scab and black rot disease, spray @ 600 gm per 200 litre of water (3 gm per litre). In other recommendations, 1.5 to 2.0 gm of zineb per litre of water (0.15 % to 0.2 %) has been recommended for other diseases of apple, such as fire blight, frog eye leaf spot, fly speck, sooty blotch, Brooks fruit spot and scab rust.

Zineb 2.0 gm per litre water (0.2 %) controls various following diseases:-

• Apricot and garlic rust, 5 sprays at 10 days interval.
• Yellow rust diseases in barley, 3 sprays at 14 days intervals.
• In beans, anthracnose, 2 sprays within one month of harvest at 12 days intervals for downy mildew and 5 to 6 sprays for angular leaf spot of beans.
• Early and late blight in celery and zineb dust can also be used.
• For post emergence damping off disease in cabbage & cauliflower, spray on nursery soil can be done.
• Ray blight in chrysanthemum.
• Greasy spot in citrus, spray 7 – 10 days interval.
• Alternaria leaf spot in egg plant & cotton, 4 sprays at 20 days interval.
• Downy mildew in cucurbits at 7 days interval.
• Leaf smut in dahlia, 5 – 7 sprays at 10 days interval from July to September.
• Purple blotch in onion, 4 sprays at 10 days interval.
• Downy mildew in onion, dusting 8% in attaclay or 0.2 % spray.
• Phalsa rust, 3 sprays at 15 days interval, before disease starts.
• Early blight of potato, spray starts when plants are 10 to 15 cm tall. Repeat 7 days interval under wet weather and 14 days under dry weather condition.
• Black spot and anthracnose in rose, spray at 7 – 10 days interval from 3^rd week of July.
• Leaf spot in sapota, monthly sprays.
• Leaf spot in strawberry, sprays at 7 – 10 days interval staring from first bloom until harvest.
• Seed dip in 0.2 % zineb for black rot disease in sweet potato.
• Blight in tea, 6 to 7 weekly sprays.
• Various diseases of tomato, such as anthracnose, late blight, early blight, grey mould, leaf mould, leaf spots etc. Spray on disease appearance and repeat at 7 to 10 days interval until 10 days from harvest.  
• For leaf spots in beets, onion, downy mildew of cabbage & cauliflower and fruit rot in chilli, 1.5 to 2.0 gm per litre of water (0.15 % to 0.2 %)

 

In chrysanthemum, rust and leaf spot can be controlled by spray of zineb 1.5 gm per litre of water (0.15 %)

 

Five minute dip of gladiolus corms in 1 gm per litre water (0.1 %) can prevent corm rot due to fusarium.

 

Phytophthora blight in pigeon pea can be controlled by spraying zineb 2.5 gm per litre water (0.25 %)

 

For cut piece decay in potato, 15 minute dip followed by drying in shade in 2.5 gm zineb per litre water (0.25 %) can be done to control many diseases.

 

In white rust in radish, spray 3 gm per litre water (0.3 %) at 8 – 10 days interval or shorter interval under wet weather can be done.

 

For leaf spot in turmeric, 3 sprays with 3 gm zineb per litre water (0.3 %) can be done.

 

The above article has been prepared from authentic literature resources. The help of some books has been taken during writing this article i.e. Fungicides in Plant Disease Control by Y. L. Nene and P. N. Thapliyal and Plant Pathology by George N. Agrios etc and Spray schedules issued from department of horticulture, Himachal Pradesh, Shimla 171002 at their website and other authentic material issued from authorized agencies.

 

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