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梨虎在恩施专区各梨产区都有发生,造成梨树生产巨大损失。如1963年专区农科所梨园因梨虎为害减产33％,五峯山公社灯塔大队和专区园艺场因梨虎为害减产99.88％。为了扑灭梨虎的为害,保证梨树增产,我所在1964年对梨虎的发生规律及防治,作了初步研究。 一、研究方法 1.运用大田调查,观察其越冬情况,并定点
Pear tiger in the Enshi area pears have occurred, resulting in a huge loss of pear production. For example, in 1963, the pear farm of the Institute of Agricultural Sciences lost 33% of its production due to the loss of the pear tiger, and the lighthouse group of Wufengshan Commune and the horticultural market of the district reduced production by 99.88% due to the loss of the pear tiger. In order to put out the harm of pear tiger and ensure the increase of pear tree, I made a preliminary study on the occurrence and prevention and cure of pear tiger in 1964. First, research methods 1 field investigation, observation of its overwintering situation, and fixed-point