Abstract
Sixteen tomato varieties were evaluated against fruit borer (Helicoverpa armigera) to find out borer resistant tomato varieties. The eight varieties were collected from Bangladesh Agricultural Research Institute (BARI) and eight varieties from the farmer’s field of South-west Bangladesh. This field experiment was conducted in a protected net house suitable for inoculation of the fruit borer at germplasm center of Khulna University for two years (2018 and 2019). Data were collected on fruit physical characters, and borer infestation. The genotypes BARI Tomato-18, BARI Tomato-16, Ruma-VF, Pusa Ruby and Guli had the minimum weight of infested fruit (3.57%, 3.63%, 4.83%, 7.17% and 7.67%, respectively ) as well as the minimum number of infested fruits (both were bellow10%) with the minimum number of larvae of H. armigera (0.23, 0.28, 0.27, 0.54 and 0.60 larvae plant-1, respectively). BARI Tomato-8, BARI Tomato-17 and Paltola were found as more susceptible (29.71%, 26.01% and 28.95% infestation, respectively) than the others. Maximum fruit weight plant-1 was recorded from the genotypes BARI Tomato-18, BARI Tomato-19, Surakha and Paltola (2603g, 2687g, 2755g and 2731g respectively) and among these BARI Tomato-18 and Suraksa gave maximum fresh yield plant-1 (2512.77 g and 2476.53 g, respectively). The fruit infestation rate was significantly and positively correlated with fruit weight loss plant-1 (r = 0.971), larvae plant-1 (r = 0.789), fruit diameter (r = 0.567) and individual fruit weight (r = 0.545). On the other hand, the fruit shape index (r = -0.44) and the number of fruit plant-1 (r = -0.498) were significant and negatively correlated with fruit infestation rate. It could be concluded that BARI Tomato-18 and BARI Tomato-16 are resistant as well as high yielding varieties.
 SAARC J. Agri., 18(2): 87-99 (2020)
Highlights
Tomato (Solanum lycopersicum L.) is one of the important and remunerative vegetable crops, which is grown everywhere in the world belongs to the family Solanaceae
This research was carried out to screen out sixteen tomato genotypes showing resistant and susceptible responses to the fruit borer, and to identify the fruit morphological characteristics influencing the infestation rate of tomato fruit borer
Sixteen tomato varieties, including 8 improved varieties viz; BARI Tomato-2, BARI Tomato-8, BARI Tomato-14, BARI Tomato-15, BARI Tomato-16, BARI Tomato17, BARI Tomato-18 and BARI Tomato-19 developed by Bangladesh Agricultural Research Institute (BARI) and 8 available genotypes collected from the farmers in South-west Bangladesh, viz; Bonkim Ruby, Pusa Ruby, Suraksa, Patharkuchi, Ruma VF, Ruma 19, Guli and Paltola were evaluated on their performance against tomato fruit borer
Summary
Tomato (Solanum lycopersicum L.) is one of the important and remunerative vegetable crops, which is grown everywhere in the world belongs to the family Solanaceae. Tomato plants are attacked by various insects-pests fruit borer Fruit borer larvae perforate the fruit and eats up the inner portion of the fruit It is responsible for significant yield loss of up to 55% (Talekar et al, 2006) and up to 46.8% in Bangladesh (Alam et al, 2007). Fruit borer damaged crop is estimated about 5 billion US dollar year-1 in the world (Sharma, 2001). It is a very hazardous pest, but the borer control operation mainly depends on chemicals which is harmful to human health. This research was carried out to screen out sixteen tomato genotypes showing resistant and susceptible responses to the fruit borer, and to identify the fruit morphological characteristics influencing the infestation rate of tomato fruit borer
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