The harvesting of delicate fruits (strawberries, raspberries, grapes, plums) and vegetables (tomatoes, mushrooms, lettuce) for the fresh market has not been successfully completed despite a substantial investment in crop breeding and mechanization research. Machines that can harvest such delicate biological tissues, generally inflict too much damage on a product destined for the fresh market but have been successful with product destined for processing. Selective harvesting is another substantial challenge facing researchers in the fruit and vegetable sector in particular.
Protection from insect infestation may be accomplished by a combination of measures including temperature reduction and occasional fumigation. Irradiation has also been proposed to control insect infestation in cereals and other products but the cost of this expensive and controversial technology is prohibitive and in any event is limited to off-farm use.

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The harvesting of delicate fruits (strawberries, raspberries, grapes, plums) and vegetables (tomatoes, mushrooms, lettuce) for the fresh market has not been successfully completed despite a substantial investment in crop breeding and mechanization research. Machines that can harvest such delicate biological tissues, generally inflict too much damage on a product destined for the fresh market but have been successful with product destined for processing. Selective harvesting is another substantial challenge facing researchers in the fruit and vegetable sector in particular.
Protection from insect infestation may be accomplished by a combination of measures including temperature reduction and occasional fumigation. Irradiation has also been proposed to control insect infestation in cereals and other products but the cost of this expensive and controversial technology is prohibitive and in any event is limited to off-farm use.

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