Abstract
The article identified 10 species of pests that damage rice plants during the season in rice agrobiocenosis. Leptestheria dahalacensis Sars, Apus concriformis Sh., Ostrinia nubilalis Hb, and Cephus pygmaeus have been reported to cause damage to rice grasses. A growth calendar has been developed. In the pest experiment during the rice germination period, Nurell D was found to contain 55% em.k. (Cypermethrin + chlorpriphos) - in the variant applied to 1.5 l/ha, the biological effectiveness of the drug is the highest for 14 days - 93.9%, in the variant treated with Tayshin 500 s.d.g (Clothianidin) -0.06 kg/ha for 14 days - 93.3%. In the experiment, the main pest Nurell D in the variant using 55% (1.5 l/ha) was 73.8 quintals of Iskandar variety, ie 13.2 quintals per hectare compared to the control, the new chemical Taishin 500 s.d.g. (0.06kg/ha) yielded 70.7 q/ha in the variant in which the chemical agent was used, and 10.1 additional yields were reported.
Highlights
Rice is one of the oldest crops in the world and a staple food for a third of the world’s population. 155 million worldwide in 2018. 765.6 million hectares of rice were planted. tons of rice were grown
Tashkent region is located in the eastern part of Uzbekistan and covers an area of 15.6 thousand km2, or 10% of the country's territory
Experimental field observations revealed that Bokovlav crabs (Leptestheria dahalacensis Sars) and shielded crabs (Apus concriformis Sh.) appeared as soon as the rice fields were flooded and multiplied in late May and early June after rice planting
Summary
Rice is one of the oldest crops in the world and a staple food for a third of the world’s population. 155 million worldwide in 2018. 765.6 million hectares of rice were planted. tons of rice were grown. Rice is planted on 115,000 hectares, and the gross harvest is 450,000 tons [1, 2]. This amount is enough to meet the growing demand of the country's population for rice, one of the main food products. The Decree of the President of the Republic of Uzbekistan dated January 16, 2018 "On measures to further ensure food security of the country" PD 5303, the Cabinet of Ministers of the Republic of Uzbekistan dated March 29, 2019 No 259 "Rational placement of agricultural crops for 2019 harvest and on the forecast volumes of production” and No 12 of December 12, 2019 “On additional measures for the development of rice” and set a number of tasks [3,4,5]
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