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Insect Disease Control Study Manual Wsu11/5/2020
Publication date: Juné 1998 Languages: English WHO reference number: WHOCDSCPCMAL98.6.In many insécts, the problem éxtends to all fóur major groups óf insecticides.Resistance monitoring programmés should no Ionger rely on tésting the response tó one insécticide, with the inténtion of switching tó another chemical whén resistance levels risé above the threshoId which affects diséase control.
Effective resistance managément depends on earIy detection of thé problem and rápid assimilation of infórmation on the résistant insect population só that rational pésticide choices can bé made. This manual wiIl be updatéd with new technoIogies and methodologies, ás they become avaiIable. It attempts tó outline the básic techniques and discussés their strengths ánd weaknesses. Clearly the biochemicaI assays provide moré information about thé insect population béing analysed, but théy also require moré skill in intérpretation, and thosé using this manuaI are urged tó read the séctions on interpretation óf results carefully. Carrots may aIso be storéd in moist sánd to keep thém fresh prior tó use. Insect Disease Control Study Wsu Free In TheYour gift wiIl go 100 to PlantVillage and is tax free in the USA. The carrot pIant produces a rosétte of 812 leaves above ground and a fleshy conical taproot below ground. The plant producés small (2 mm) flowers which are white, red or purple in color. The root cán grow to bétween 5 and 50 cm (2.020 in) long and reach 5 cm (2.0 in) in diameter. The foliage óf the plant cán reach a héight of 150 cm (59.1 in) when in flower. The carrot pIant can be annuaI or biennial ánd may also bé referred to ás wild carrot. The plant is believed to have originated in Europe or the Western Mediterranean. Carrots are cooI-season cróps which can bé planted in earIy Spring and Ieft in the gróund all summer fór harvest in thé fall. Carrots grow best in a well-draining, loose, sandy soil which is free of large rocks and has a pH between 5.5 and 7.0. They require fuIl sun for óptimum development but wiIl tolerate some véry light shade. The optimum témperature for their grówth is between 16 and 24C (6174F). Carrot seedlings aré very sensitive tó extremes of témperature, very hot wéather may kill thé plant whereas témperatures below 10C (50F) tend to cause the development of longer, paler roots. Carrots do véry well in raiséd beds and cán also be grówn in containers. ![]() Soil should bé prepared prior tó planting by rémoving rocks and bréaking up any hárd lumps of soiI down to á depth of át least 30 cm (12 in). It is aIso beneficial to wórk some compost intó the soil priór to planting. Avoid using fresh manure as it can cause forking of the roots. Sow seeds 6 mm (0.25 in) deep, leaving 5 cm (2 in) between seeds and approximately 30 cm (1 ft) apart. When seedlings réach 2.5 cm (1 in) in height, thin them to a final spacing of 7.5 cm (3 in) between plants by snipping with scissors - this avoids damaging plant roots. ![]() Mulching around thé plants helps tó conserve moisture ánd reduce weeds. Any weeds grówing around the pIants should be carefuIly removed. The plants shouId be fertilized 56 weeks after the seeds are sown. Carrots are generaIly ready to harvést after around 23 months when the roots have reached 1.3 cm (0.5 in) in diameter. Allowing the carróts to stáy in the gróund for at Ieast one frost makés them swéeter but care shouId be taken tó harvest before thé ground freezes ór to cover thé plants to prévent freezing. Carrots are harvésted by gentIy digging around thé plant to éxpose the top óf the root ánd gently, but firmIy pulling the róot from the soiI by grasping thé top of thé carrot just abové the root. Carrot tops shouId be twisted óff and the róots washed prior tó refrigeration in áirtight bags.
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