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Jasmine growers have to be more alert and adopt suitable methods to avoid discolouration of the flower. The fragrant flower is cultivated by small farmers in limited area and its cultivation is affected by insects and pests. The bud, when exposed to toxic substances, gets easily affected, according to T. Abdul Razak, Entomologist, Agricultural College and Research Institute, Killikulam.
Talking to The Hindu here recently, he said that jasmine buds were affected by the larvae of blossom midge Contarinia maculipennis. This insect would feed the inside of buds causing discolouration and the affected buds would finally dry up and fall.
The change of colour of buds to purple was due to the toxic saliva of the larvae. Normally, in a single flower bud, there would be more than five larvae feeding inside.
After attaining full maturity in five to seven days, the maggots would come out of the flower buds and drop down to the soil for pupation. In the subsequent stage, the adult flies would emerge from soil after a period of 12-15 days and the females would lay eggs on the tip of the flower buds. Within 24 hours, larvae would come out of the eggs and start feeding inside the flower buds.
茉莉花种植者必须更加警惕并采用合适的方法来避免花朵褪色。香花由有限区域的小农种植，其栽培受昆虫和害虫的影响。根据Killikulam农业学院和研究所昆虫学家T. Abdul Razak的说法，当暴露于有毒物质时，芽很容易受到影响。
他最近在这里与印度教徒交谈时说，茉莉花蕾受到了开花瘿蚊（Contarinia maculipennis）幼虫的影响。这种昆虫会喂养芽的内部，导致褪色，受影响的芽最终会干涸和摔倒。
芽的颜色变为紫色是由于幼虫的有毒唾液。通常，在一个花蕾中，将有超过五个幼虫进食。
在五到七天完全成熟后，蛆将从花蕾中出来并落到土壤中进行化蛹。在随后的阶段，成虫果蝇会在12-15天后从土壤中出现，雌性会在花蕾的顶端产卵。在24小时内，幼虫会从卵中出来并开始在花蕾内进食。 |
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重新编辑！刚才被吞了3000字！！大家都来说下自己选房中最后悔的那次擦肩而过吧！ (2014-10-11) zuyidi 
发表于 2019-4-7 15:09
