Garlic is an herbaceous annual bulbous plant in the family Amaryllidaceae grown for its pungent and edible bulb. Among the various biotic factors hindering production and productivity, purple blotch plays a predominant role in changing the crops morpho-physiological characters, thus deteriorating the metabolic activity in turn affecting the yield considerably. Fungicides have been recommended for the control of the disease, however use of fungicides is expensive and not eco-friendly. The best approach to control the disease is by using resistant genotypes. Hence, 37 genotypes were field screened at AINRPOG (All India Network Research Project on Onion and Garlic), MARS (Main Agricultural Research Station), Dharwad against purple blotch disease under artificial epiphytotic conditions during Kharif in year 2019 to identify the resistant sources. The results revealed that twenty genotypes were found to be resistant (1-10%) and five genotypes were immune (0%) however, ten genotypes were found moderately resistant (11-20%) in reaction. The remaining two genotypes viz., HRG Local and DOGR409 were found moderately susceptible (21-40%) with a maximum grade of 3 on (0-5) scale. None of the genotypes showed susceptible or highly susceptible reactions to purple blotch. Breeders can make use of these identified resistant lines in developing high yield purple blotch disease resistant varieties.

The present study was conducted at farmer’s field in Kyarakoppa village of Dharwad taluka, Karnataka, India during 2014–15 and 2015–16. Mango (Mangifera indica L.) is considered as one of the most important fruit crop for millions of people in the world, particularly in India where it is deemed to be the choicest of all indigenous fruits. Mango powdery mildew caused by Oidium mangiferae Berthet is a severe disease that infects all parts of mango trees except the fruits. Organic production has recently increased the demand for environmental friendly control programs to eliminate the risk of fungicide and pesticide resistance so, it is important to study the alternatives from natural extractions. Hence, the present investigation was carried to evaluate the use of some eco-friendly compounds as alternatives to control the powdery mildew of mango. The results revealed that out of ten different treatments evaluated, the treatment T4 involving panchagavya @ 1:10 dilution has resulted in least mean disease severity of 30.27% and maximum net returns (` 1,12,900) as against 61.00% disease severity and minimum net returns (` 50,000) in the control. The treatment T4 was statistically on par with recommended fungicide sulphur @ 3 g l-1 which has resulted in 28.96% Disease Index over the years. However, the taste and smell were found to be superior with panchagavya sprayed trees which has produced yield 6.75 t ha-1 with cost benefit ratio of 5.11 as compared to C:B ratio of triadimefon (6.86) and sulphur (6.37).

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Garlic (Allium sativum L.) is one of the oldest cultivated plants in the world and belongs to the family Amaryllidaceae. Purple blotch caused by Alternaria porri (Ellis) Ciferri is one such disease which causes a great deal of loss for farmers. The best method to manage purple blotch is to adopt resistant genotypes for cultivation, which is highly necessary in areas with a high incidence. In order to identify resistant sources, 37 genotypes were field screened under artificial epiphytotic conditions at AINRPOG (All India Network Research Project on Onion and Garlic), MARS (Main Agricultural Research Station), Dharwad during Rabi, 2019 and 2020. Results from two years showed that no genotype was immune to purple blotch. Among the genotypes tested, five genotypes viz., G50, Bhima Purple, DOGR426, DOGR543 and DOGR569 were resistant to infection (1-10%), 17 genotypes moderately resistant to infection (11-20%), while 4 genotypes were moderately susceptible to infection (21-40%). On a scale of 0 to 5, only one genotype (HRG Local) showed susceptible (41-75%) in reaction. Among the remaining genotypes, disease reactions differed between years. The genotypes that are resistant can be utilized by breeders to produce high yielding purple blotch resistant varieties.