1.Uma amaqabunga ephuzi ngokushesha engadini yonke, kungenzeka ukuthi kube yi-phytotoxicity;(ngenxa yokuntuleka kwezakhi noma izifo, akunakwenzeka ukuthi ingadi yonke izoqhuma maduze).

2. Uma kwenzeka ngezikhathi ezithile, ingxenye yesitshalo ishiya ukuphuzi futhi kukhona inqubo, kungase kube ukuntuleka kwezakhi, izifo zezimpande noma izifo zamaqabunga.

3. Uma imithambo yamaqabunga iluhlaza, kodwa imithambo iphuzi, kungase kube ukuntuleka kwensimbi noma i-magnesium.Singaqhubeka nokuhlukanisa.Uma amaqabunga amadala ephuzi futhi amaqabunga amasha engewona aphuzi, angabonakala njengokuntuleka kwe-magnesium;uma amaqabunga amadala engaphuzi futhi amaqabunga amasha aphuzi, kungabonakala njengokushoda kwensimbi.

4. Uma imithambo yamaqabunga aphuzi iphuzi futhi imithambo iluhlaza, kungabonakala njengesifo segciwane.

5. Uma kukhona amabala aphuzi emaqabunga aphuzi, futhi i-macula i-necrosis kancane kancane, ingabonakala njengesifo sokukhunta emaqabunga.

6. Uma amaqabunga aphuzi ebuna kusukela emaphethelweni eqabunga kuqala, kodwa imithambo kanye nemithambo kusejwayelekile, kungabonakala njengokulimala kwezimpande noma ukulimala komanyolo.

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