leaf curl disease

For chilli http://www.thehindu.com/sci-tech/agriculture/management-of-chilli-thrips-and-mites/article5448331.ece
Utilisation of indigenous materials have confirmed that garlic chilli kerosene extract [GCK at 0.5 per cent] +nimbecidine (2.5 ml/lit) can effectively combat the problem.
https://www.youtube.com/watch?v=3wQMnXXvRTo
raw haldi and green chilli paste/crush in 1 glass water and spray for leaf curl
leaf spot disease mosaic virus

• Spraying with a baking soda solution (a tablespoon of baking soda, 2 1/2 tablespoons of vegetable oil, a teaspoon of liquid soap, not detergent, to one gallon of water), or neem oil (do not use when pollinating insects including bees or other beneficial insects are present). Baking soda may burn some plant leaves. Spray only a few and then check for a reaction before applying applications every two weeks.https://www.planetnatural.com/pest-problem-solver/plant-disease/bacterial-leaf-spot/
• http://greenfoundation.in/bpdm/search/d7.html
• http://greenfoundation.in/bpdm/search/cm37.html
• plant diseases
• http://www.gardeningknowhow.com/plant-problems/disease/plant-leaf-spots.htm
• spraying with a mild solution of bicarbonate of soda (baking soda), using ½ teaspoon per gallon of water. Read more at Gardening Know How: Plants With Spotted Leaves: Fungal Leaf Spot Treatments http://www.gardeningknowhow.com/plant-problems/disease/plant-leaf-spots.htm
• http://www.thehindu.com/todays-paper/tp-features/tp-sci-tech-and-agri/biopesticides-ginger-garlic-extract-measures-up/article1446677.ece
• Five leaf extract
  For example she uses 5 different leaf extracts (eindhu ilai karaisal in Tamil) derived from Calotropis (called yerukku in Tamil), Jatropha curcas (kattu amanaku in Tamil), Neem (vembu in Tamil), Guduchhi/Amruth (seenthil kodi in Tamil), Chaste tree (nochi in Tamil), Malabar nut (adathoda in Tamil), Kalmegh (siriyanangai in Tamil), Clerodendron (peenarisanghu in Tamil) and Usil (arappu in Tamil). These plants are commonly found in all villages. About 1 kg of leaves from each plant is taken and powdered and then ground into a paste. It is then mixed with 5 litres of cow’s urine.
  The concoction is then diluted in 5 litres of water and left undisturbed for 5 days. When required for using about 500 ml of this concoction is diluted in 10 litres of water and sprayed over the plants, she explains.
  Ginger garlic extract
  Another tried and proven mixture she uses is ginger garlic extract (called inji poondu karaisal in Tamil). About 1 gm of ginger and garlic each, 2gm of green chilli and 5 litres of cow’s urine and water are taken. The garlic, ginger and green chilli are ground into a paste and mixed with cow’s urine and water. After 10 days the mixture is filtered and used.
  The prescribed quantity is about 500 ml of this solution diluted in 10 litres of water which can be sprayed over the plants.
  Ideal spraying time
  The ideal time for spraying these karasals is during 6 am to 8.30 am and between 4 pm and 6.30 pm. Depending upon the soil, crop and other climatic factors the concentration can be raised or lowered.
  Farmers can contact their nearby organic farmers who are using these karaisals or can contact Ms. Rajareega for guidelines regarding the concentration.
  Effective control
  Both the above karaisals have been found effective in controlling leaf roller, thrips, mealy bugs, fruit, stem and bark borer, hairy caterpillar and aphids.
  
  
• http://theunconventionalfarmer.com/recipes/ginger-garlic-extract/
• http://www.oisat.org/control_methods/plants_in_pest_control/ginger.html
• https://www.plantvillage.org/en/topics/chilli-pepper
• If aphid population is limited to just a few leaves or shoots then the infestation can be pruned out to provide control; check transplants for aphids before planting; use tolerant varieties if available; reflective mulches such as silver colored plastic can deter aphids from feeding on plants; sturdy plants can be sprayed with a strong jet of water to knock aphids from leaves; insecticides are generally only required to treat aphids if the infestation is very high - plants generally tolerate low and medium level infestation; insecticidal soaps or oils such as neem or canola oil are usually the best method of control; always check the labels of the products for specific usage guidelines prior to use.