Detail:

To control aphids or talkidi in the cotton (Gossypium hirsutum) crop, Vaghabhai Chavda merely uses onion (Allium cepa) juice. He uses water as the medium to make the juice seep into the soil where the insects lie in wait as part of their life cycle. Vaghabhai takes 10 kg onions per acre. These are crushed and the juice is let into water at the source of water supply for the crop. As water enters the field it carries onion juice as well. Since onion juice is put at the source of water to the crop, seepage in the length and breadth of the crop is ensured. The success of the practice lies in ensuring even seepage. That is why the cotton growers in Bhavnagar district are following the method. This is a traditional method.

Knowledge Provider / Innovator: Vaghabhai Nodhbhai Chaba
Agro-Ecological Zone: South Saurashtra Zone (GJ.7)
Address: Zanzmer, Umrala, Bhavnagar
District: Bhavnagar
State: Gujarat
PIN Code 364320

Crop: Cotton Crop
Crop Family: Mallows
Crop Scientific Name: (Gossypium spp.)
Crop Vernacular Name: Kapas
Formulation: Liquid of onion (Allium cepa) juice
Ingredients: onion (Allium cepa), juice

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PAS 1:

"Onion as a Pest Control Intercrop in Organic Cabbage (Brassica oleracea) Production System in Ghana - Onion was used in an intercrop as a non host crop to manage the pests of cabbage. The experiment was conducted in a Randomized Complete Block Design with four treatments; sole cabbage (T1), 2 rows of cabbage to 1 row of onion (T2), 3 rows of cabbage to 1 row of onion (T3) and 4 rows of cabbage to 1 row of onion (T4), each of which was replicated three times. Data were collected on pests’ numbers, plant height, damaged leaves at harvest, canopy spread, number of damaged heads and fresh weight. Significantly fewer Bemisia tabaci, Hellula undalis and Brevicoryne brassicae infested the intercropped plants than the sole crop. However, intercropping cabbage with onion did not significantly reduce Plutella xylostella population on cabbage. Number of damaged heads, fresh weight and damaged leaves were significantly different (P< 0.05)."
http://ir.knust.edu.gh/handle/123456789/11114

PAS 2:

"Onion (Allium cepa) and garlic (Allium sativum) as pest control intercrops in cabbage based intercrop systems in Zimbabwe - Cultural methods can be implemented to reduce the problems that have been caused by indiscriminate use of insecticides. An experiment was carried out in Makonde District, Zimbabwe to determine the ability of onion and garlic to reduce pest problem when intercropped with cabbages. A randomised complete block design was used with five treatments replicated three times. The treatments were (1) cabbage intercropped with garlic within rows, (2) cabbage intercropped with onion within rows (3) Cabbage and onion intercropped within rows (4) Cabbage and garlic intercropped within rows and (5) Sole cabbage. Data collected were on pest prevalence at physiological maturity, cabbage plants that survived at three weeks after planting (WAP), number of cabbage leaves damaged by insect pests at 6 (WAP), cabbage head diameter and yield of cabbages at physiological maturity. Intercropping cabbage significantly reduced pest revalence, plant death after transplanting, leaf damage and increased cabbage yield compared to sole cabbage crop. However there were generally more benefits when intercropping with either garlic or onions between the rows than within the rows though not statistically different from intercropping within the cabbage rows at p<0.05 "
https://www.researchgate.net/profile/Rumbidzai_Katsaruware/publication/271255202_Onion_Allium_cepa_and_garlic_Allium_sativum_as_pest_control_intercrops_in_cabbage_based_intercrop_systems_in_Zimbabwe/links/5800b65f08ae88b5a3bbd82a/Onion-Allium-cepa-and-garlic-Allium-sativum-as-pest-control-intercrops-in-cabbage-based-intercrop-systems-in-Zimbabwe.pdf